The single large breaker at the top of a service panel that disconnects all branch circuits at once. Must be sized to match the service entrance conductor ampacity (100A, 200A, 320A).
Related service:
Electrical →
Comprehensive plain-English definitions for contractor, building code, and trade terms across HVAC, plumbing, electrical, roofing, flooring, landscaping, pest control, and more. Know the language before you hire.
Service tags suggest a relevant trade for this topic. They open an estimate request, not an instant appointment or a contractor endorsement. Definitions are general guidance; local codes and requirements vary.
2,113 terms
A low-voltage dimming control protocol used in commercial LED fixtures. Provides smooth full-range dimming; requires dedicated control wiring.
The standard household voltage in the United States — one hot wire plus neutral and ground, providing 120 volts at 15 or 20 amps. Used for outlets, lighting, and small appliances.
Standard wall framing lumber with actual dimensions of 1.5" × 3.5". Douglas fir and southern yellow pine are the most common species. 2×4 walls allow R-13 to R-15 of cavity insulation; 2×6 walls allow R-19 to R-21.
Wall framing using 2×6 (actual 1.5" × 5.5") studs rather than standard 2×4, providing a deeper cavity for more insulation (R-19 to R-21). Common in cold climates and energy-efficient construction.
A higher-voltage household circuit using two hot wires plus neutral and ground, providing 240 volts for large appliances — ranges, dryers, AC units, EV chargers, and hot tubs. Requires double-pole breakers.
An ASHRAE safety classification for mildly flammable, lower-toxicity refrigerants such as R-32 and R-454B. Requires leak-detection sensors and reduced charge limits in indoor units per UL 60335-2-40.
A one-way mechanical vent that admits air to a drain system but blocks sewer gas. Allowed in island sinks and remodels where extending a hard vent is impractical. Banned in some jurisdictions — verify locally.
Acrylonitrile-butadiene-styrene plastic drain piping. Black; cement-welded with ABS-only solvent. Common in pre-2000 construction; still allowed in many western states for residential drainage.
A battery with its own inverter on the AC side of the home. Easier to retrofit to existing solar; simpler inverter coordination.
A bold color used on one wall, ceiling, or architectural feature. Adds depth without committing the whole room; pulls from artwork, fabric, or trim accents.
A single wall in a room finished differently from the others — in a bolder color, with wallpaper, shiplap, stone veneer, or a wood slat panel — to create visual interest and a focal point.
A security system that restricts entry to specific individuals using key cards, PIN codes, biometrics, or smart devices. Residential systems include smart locks, keypads, and video doorbells.
A removable cover that provides entry to concealed plumbing valves, electrical boxes, or HVAC components inside walls or ceilings. Required by code near bathtub drain assemblies and shower valves.
The process of allowing wood flooring to adjust to the temperature and humidity of the installation site before installation. Hardwood requires 3–7 days of acclimation; engineered requires 48 hours. Skipping causes gapping or cupping.
Letting flooring sit in the room 3–7 days before installation to match local humidity. Skipping acclimation causes gapping in winter and cupping in summer.
A vapor-trap vessel in the suction line of a heat pump that prevents liquid refrigerant from slugging the compressor. Sized to the system; never replace with a smaller unit.
Air Changes per Hour at 50 pascals — the standard tightness metric from a blower door test. Energy-efficient new homes target under 3 ACH50; Passive House requires 0.6 or below.
A reactive metallic salt stain that creates variegated, marble-like color on concrete. Permanent and unique each time; requires neutralization and sealing after application.
A simple chemical test that detects acid contamination in refrigerant oil — a sign of compressor burnout. Required before installing replacement compressors to prevent contaminating new equipment.
Treatment of new or stained concrete with a diluted muriatic acid solution to remove surface efflorescence, open the pores for sealing, or prepare the surface for a new finish. Neutralize with baking soda before rinsing.
A textured ceiling tile (Armstrong, USG) absorbing sound. Standard size 2×2 or 2×4 feet for drop ceilings; available in plain to high-end architectural styles.
A water-based sealant used around windows, doors, and baseboards that can be painted. Paintable latex caulk is easier to work with than silicone but less durable in wet areas. Use silicone in bathrooms and kitchens.
Water-based paint using acrylic resins. The dominant interior and exterior paint in U.S. residential — superior color retention, low VOC, and easy water cleanup vs. oil-based.
Water-based interior or exterior paint that dries quickly, resists fading, and cleans up with water. Premium acrylic paints (Benjamin Moore Aura, Sherwin-Williams Emerald) offer better coverage and durability.
A water-based reflective coating that's cheaper than silicone but less ponding-water tolerant. Common on dry climate residential and commercial flat roofs.
Meets standards set by the Americans with Disabilities Act — including accessible door widths (32" min clear), grab bars, zero-threshold entries, and 1:12 ramp grades. Required in commercial construction; increasingly common in residential aging-in-place remodels.
Structural or finish adhesives used in construction — construction adhesive (Liquid Nails, Loctite PL) bonds framing, drywall, and subflooring. Polyurethane adhesive is waterproof; epoxy provides the highest strength.
A secondary residential unit on the same lot as a primary home — including garage conversions, basement apartments, and detached guest houses. Many cities now allow ADUs by-right. Can generate $1,500–$3,500/month rental income.
A framing technique using 24" stud spacing, single top plates, and inset headers to reduce wood and increase insulation cavities. Common in green building.
Perforating lawn soil with small holes to relieve compaction, improve water penetration, and enhance root growth. Core aeration removes plugs 2–3" deep. Best done in fall for cool-season grasses; spring/summer for warm-season.
Pulling cores from lawn to relieve compaction and improve oxygen delivery to roots. Annual fall service; combine with overseeding for thicker turf.
A small mesh screen at a faucet outlet that mixes air with water to reduce splashing and flow. Mineral deposits clog aerators — soak in vinegar to restore flow without replacement.
An interior duct-sealing process using aerosolized polymer particles that bond to leak edges. Seals leaks invisibly without accessing ducts; cost $1,500–$3,500 per home.
Arc Fault Circuit Interrupter — a circuit breaker that detects dangerous arcing electrical faults and cuts power before a fire starts. Required by the NEC in bedrooms, living areas, and kitchens in new construction since 2020.
An arc-fault-protected outlet that protects downstream wiring on a circuit not served by an AFCI breaker. Useful for retrofitting AFCI protection in homes with old panels.
Annual Fuel Utilization Efficiency — measures how efficiently a furnace or boiler converts fuel to heat over a full heating season. A 96% AFUE furnace wastes only 4% of fuel. Minimum efficiency for new gas furnaces is 80% AFUE.
Gravel, sand, or crushed stone mixed into concrete or asphalt to add strength and bulk. Exposed aggregate is a decorative concrete finish where the surface mortar is washed away to reveal embedded stones.
Air-Conditioning, Heating, and Refrigeration Institute certification confirms that HVAC equipment performs at its rated efficiency. Look for AHRI-certified matchups when replacing only one component of a split system.
A standardized construction contract produced by the American Institute of Architects — widely used for larger residential and commercial projects. AIA A101 (cost plus) and A102 (fixed price) are the most common residential forms.
Amps Interrupting Capacity — the maximum fault current a breaker can safely interrupt. Standard residential breakers are 10kAIC; high-fault locations may need 22kAIC or higher.
The American Innovation and Manufacturing Act of 2020, which directs the EPA to phase down HFC refrigerant production by 85% over 15 years. Drives the 2025 transition from R-410A to R-454B in residential HVAC.
A continuous layer of housewrap, sheathing, drywall, or other materials that controls air leakage. Often more impactful than added insulation in older homes.
A capped vertical pipe stub designed to cushion water hammer. Older homes used 12-inch air chambers, but they fill with water over time. Replace failed chambers with mechanical hammer arrestors.
An appliance that cools and dehumidifies indoor air by transferring heat to the outdoors via a refrigerant cycle. Central split systems, window units, and mini-splits are the three main residential types.
The fluid that absorbs and releases heat as it cycles between liquid and gas states in an AC system. R-410A is the standard residential refrigerant; R-22 (Freon) is phased out. R-32 and R-454B are newer lower-GWP alternatives.
The cooling capacity of an AC system measured in tons, where 1 ton = 12,000 BTU/hr. A 2,000 sq ft home typically requires 2–4 tons depending on climate, insulation, and sun exposure.
Professional cleaning of supply and return air ducts using vacuum equipment and agitation tools. EPA says routine duct cleaning isn't necessary but recommends it after mold presence, vermin infestation, or major renovation.
A device that removes dissolved air from a hydronic loop, preventing noisy banging and corrosion. Microbubble eliminators (Spirovent, Caleffi) are the modern standard for new boiler installs.
Microscopic air bubbles intentionally added to concrete for freeze-thaw resistance. 4–6% entrained air is required for exterior flatwork in northern climates.
A media filter in the HVAC return air stream that captures dust, allergens, and particles. MERV 8–13 filters balance efficiency with airflow. MERV 16 or HEPA systems require appropriate duct pressure design.
A code-required air space between a water outlet and the flood rim of a plumbing fixture that prevents backflow and contamination. Dishwashers require an air gap device on the countertop or sink rim.
The indoor unit of a split HVAC system containing the blower fan and evaporator coil. The air handler circulates conditioned air through the duct system. It is paired with an outdoor condenser unit.
The amount of air infiltrating around a window assembly. ENERGY STAR limit is 0.30 cfm/ft²; quality replacement windows typically test below 0.10.
A pneumatic tool that drives nails rapidly using compressed air — used for framing, finish carpentry, roofing, and flooring. Dramatically faster than hand nailing; framing nailers drive 3" nails through 2× lumber.
The duct opening that pulls indoor air back to the HVAC system for reconditioning. Undersized or blocked returns reduce airflow and cause pressure imbalances, leading to comfort complaints and energy waste.
The process of filling gaps, penetrations, and cracks in the building envelope with caulk, spray foam, or tape to reduce uncontrolled air infiltration. Air sealing before insulating can reduce heating and cooling costs 15–30%.
Caulk, foam, and gaskets sealing penetrations in the building envelope. Cheaper and often more impactful than added insulation; payback measured in months for big leaks.
A high-pressure pump sprayer for fast painting of large interior and exterior surfaces. Heavy overspray; not suitable for fine cabinetry without specialized tips.
A recessed light with a sealed housing that prevents air leakage between the conditioned space and attic. Required by energy code in many jurisdictions.
The central brain of a home security system that monitors all sensors, communicates with a monitoring center, and activates alarms. Modern panels include cellular backup, app control, and integration with smart home devices.
Asphalt shingles with copper-infused granules that prevent black streaking from algae growth. Identified by 'AR' suffix; warranties typically 10 years against staining.
Total alkalinity measures the buffering capacity of pool water against pH changes. Ideal range: 80–120 ppm. Low alkalinity causes pH swings; high alkalinity causes scale and cloudy water. Adjusted with sodium bicarbonate (up) or muriatic acid (down).
Oil-based or water-based-alkyd paint with hard-curing properties. Used for trim and cabinets where a hard, level surface is desired. Modern water-based alkyds combine acrylic cleanup with oil's leveling.
A budget line item in a construction contract for finishes not yet selected — tile, fixtures, countertops, or hardware. Allowances are often set unrealistically low; confirm realistic prices before signing.
A purple-bodied terminal connector with a steel set-screw, designed to safely terminate aluminum branch wiring. UL-approved fix for older aluminum-wired homes.
Pre-1973 aluminum branch wiring that overheats at terminations. Mitigation: COPALUM crimps or AlumiConn connectors at every device — costs $5,000–$15,000 for a typical home.
Extruded aluminum deck boards that never rot, warp, or require finishing. Completely waterproof — often used over living space or garages. More expensive than composite; lasts indefinitely. Hollow profile reduces weight.
A lightweight metal fence often used as decorative pool fencing. Code-compliant pool fence in most jurisdictions; 4-foot minimum height.
Pre-finished aluminum panels used to close the underside of roof overhangs. Available with solid or perforated (ventilated) sections. More durable than wood soffit — won't rot or need painting.
Coil stock aluminum used by siding contractors to custom-fabricate window and door trim, fascia covers, and soffit profiles. Pre-colored in standard exterior colors — no painting required.
Electrical wiring used in residential construction from approximately 1965–1973 as a copper substitute. Aluminum wiring creates fire hazards at connections due to expansion/contraction. Licensed electricians should inspect and remediate.
A wood window with aluminum cladding on the exterior. Combines wood interior beauty with weatherproof aluminum exterior maintenance.
A factory-applied UV-cured finish with embedded aluminum-oxide ceramic particles. Most durable hardwood finish; used on virtually all prefinished engineered floors.
Amazon's voice-activated smart-home platform. Largest device ecosystem; Echo speakers as hubs in many setups.
The unit of electrical current flow. Standard household circuits carry 15–20 amps. Large appliances require dedicated 30–50 amp circuits. A typical home service entrance is 100–200 amps.
A threaded bolt embedded in a concrete foundation that secures the sill plate (bottom of wall framing) to the foundation. Anchor bolts resist lateral loads from wind and seismic forces.
A leading U.S. window manufacturer known for the 400 Series and A-Series. Strong dealer network and replacement parts availability over decades.
A versatile power tool using rotating abrasive discs for cutting metal, masonry, tile, and rebar; grinding welds; and removing paint and rust. One of the most dangerous handheld power tools — use grinding shield and eye protection.
A plant that completes its life cycle — germination, growth, flowering, seeding — in a single growing season and must be replanted each year. Marigolds, petunias, and impatiens are common annuals used for seasonal color.
A sacrificial magnesium or aluminum rod inside a tank water heater that corrodes preferentially to protect the tank. Inspect every 3 years and replace when 50% consumed; doubles tank lifespan.
Treatment for carpenter ants, fire ants, pavement ants, or odorous house ants using baits, perimeter sprays, or gel treatments. Carpenter ants nest in moist or rotting wood — locate and repair the moisture source.
A pressure-balancing or thermostatic mixing valve that prevents water from exceeding 120°F at a shower or tub. Required by code in new construction — retrofitting prevents burns, especially for children and the elderly.
A control that prevents an AC compressor from restarting for 3–5 minutes after shutdown. Protects the compressor from damage caused by trying to start against high head pressure.
A valve preventing water from flowing back from sprinklers into the supply. Older code-approved backflow protection; many areas now require pressure-vacuum breakers.
A pool drain cover meeting VGBA federal requirements. Prevents body and hair entrapment; replace if cracked or non-compliant.
Apple's smart-home framework. Tightly integrated with iOS; emphasizes privacy. Requires Apple TV, HomePod, or iPad as hub for remote access.
A licensed appraiser's opinion of a property's market value based on recent sales of comparable properties. Required by mortgage lenders before closing. Renovations add value, but rarely dollar-for-dollar.
The difference between leaving fluid temperature and the saturation temperature of the refrigerant in a coil or heat exchanger. Lower approach temps indicate cleaner coils and better heat-transfer performance.
The flat trim board installed on the wall directly below a window sill. Also refers to the concrete or asphalt pad in front of a garage door, and to decorative trim at the base of a kitchen island.
The decorative molding below a window stool. Adds a finished look on traditional trim profiles.
A continuous L-shaped flashing along the bottom edge of a chimney, dormer, or wall transition. Sometimes called head flashing or saddle flashing depending on location.
A sink with exposed front face extending past the cabinet. Also called farmhouse sink. Country, modern, and transitional kitchens use this style.
A freestanding garden structure with an open lattice or beam roof to support climbing plants. Typically arched or flat-topped. Requires concrete footings to withstand wind loads. Adds outdoor privacy and architectural interest.
A professional certified in the care and maintenance of trees — including pruning, removal, cabling, and disease treatment. International Society of Arboriculture (ISA) certification indicates professional training.
An unintended electrical arc between wires or connections caused by loose connections, damaged insulation, or overloaded wiring. A leading cause of residential electrical fires. AFCI breakers detect and interrupt arc faults.
Also called dimensional or laminate shingles — multi-layer asphalt shingles that create a three-dimensional appearance. They last 25–30 years and are more wind-resistant than flat 3-tab shingles.
A floor or ground-level drain that collects surface water and directs it to a storm drain or drywell. Common in patios, pool decks, driveways, and basement floors prone to flooding.
An inert gas filling the space between window panes for better insulation than air. Standard on most modern Low-E windows; lasts 15–20 years before slow leakage.
An inert gas used between double-pane window glass for better insulation than air — argon has 34% lower thermal conductivity. Standard in most Energy Star-rated windows. Krypton fill is used in triple-pane units.
Revised architectural drawings showing the actual finished conditions of a building, including field modifications made during construction. Essential for future renovations and insurance documentation.
A naturally occurring mineral used in building materials before 1980 — including floor tiles, roof shingles, pipe insulation, and drywall joint compound. Disturbing asbestos-containing material releases carcinogenic fibers; professional abatement is required.
The residential ventilation standard requiring a minimum of 7.5 CFM per occupant + 3 CFM per 100 sq ft of conditioned space. Drives ERV/HRV sizing in tight new homes and deep retrofits.
Patching potholes with cold patch (DIY) or hot mix (pro). Edge cleaning and tack coat are key for permanent repairs.
An emulsion coating renewing asphalt driveways. Aesthetic refresh and modest UV protection; reapply every 2–3 years for best results.
The most common roofing material in the U.S., made from a fiberglass mat saturated with asphalt and coated with mineral granules. Available in 3-tab (20–25 year life) and architectural styles (25–30 year life).
The value assigned to a property by the local government for property tax purposes — typically 80–100% of market value depending on jurisdiction. Assessed values update on varying schedules and can be appealed.
A timer that adjusts on/off times by latitude/longitude and date for accurate dusk-to-dawn outdoor lighting control. More precise than fixed-time timers; common in landscape lighting.
A traditional combustion appliance that draws air from the surrounding room and vents through a natural-draft chimney. Vulnerable to backdrafting in tight, depressurized homes — being phased out of new construction.
A powered fan that exhausts hot attic air through the roof or gable vents. Whole-house fans pull indoor air into the attic and out through openings — highly effective for natural cooling in mild climates.
A roof- or gable-mounted fan that exhausts hot attic air. Studies show electric attic fans can pull conditioned air through ceiling leaks; passive ridge/soffit ventilation is usually a better solution.
A framed access opening in the ceiling that provides entry to the attic space. Uninsulated attic hatches are a major source of heat loss — weatherstrip the perimeter and add rigid insulation to the back of the hatch.
A system of intake vents (soffit) and exhaust vents (ridge or gable) that allows outside air to flow through the attic, preventing moisture buildup and ice dams in winter, and reducing cooling loads in summer.
Code-required attic ventilation: 1 sq ft net free area per 150 sq ft attic floor (1:150) — or 1:300 with proper soffit-to-ridge balance.
An advanced septic system that aerates wastewater for higher-quality effluent. Required where soils or setbacks don't allow conventional septic; needs annual professional service.
A plumbing snake — a flexible cable with a cutting head used to clear clogs in drains and toilets. Hand augers handle sink clogs; powered drum augers clear sewer lines. Also refers to a drilling tool for post holes in landscaping.
A motorized pool cover deploying via switch. Saves heat, reduces chemical loss, and improves child safety. $10,000–$25,000 installed.
A switch that detects utility power loss and automatically transfers to a standby generator within 10–30 seconds. Used with whole-house standby generators (Generac, Kohler, Briggs).
A control that prevents auxiliary heat from running above a defined outdoor temperature. Saves significant electricity by forcing the heat pump to handle moderate heating loads alone.
Backup electric resistance or gas heat staged on by a heat pump during very cold weather or defrost cycles. Locking out auxiliary heat above 35°F outdoor temperature significantly cuts winter electric bills.
A retractable or fixed covering projecting from a wall over a window or door, providing shade and rain protection. Motorized retractable awnings cost $1,500–$4,500 installed. Fixed aluminum awnings start at $300.
A top-hinged window opening outward. Allows ventilation during light rain; common above kitchen sinks and in basements/bathrooms.
Applying thinset to the back of each tile in addition to the trowel ridges on the substrate. Required by ANSI for tiles 15" or larger to ensure full coverage.
When combustion gases reverse flow and spill into the home instead of venting up the flue. Caused by chimney problems, depressurization from exhaust fans, or blocked vents. A serious CO poisoning risk.
Closed-cell foam rope used to fill gaps before caulk. Limits how much caulk is needed and provides correct hourglass-shape joint geometry for long-term flexibility.
Soil or gravel compacted around a foundation wall after concrete has cured. Poor backfill compaction causes settlement, cracked driveways, and foundation drainage problems.
The reversal of water flow in an irrigation system that could contaminate the potable water supply with fertilizers, pesticides, and soil. All irrigation systems must include a backflow preventer — required by law in most jurisdictions.
A device on irrigation systems and some plumbing connections that prevents contaminated water from flowing backward into the potable water supply. Required by code on all irrigation systems and many commercial connections.
A code-required device (typically a reduced-pressure or double-check assembly) on irrigation systems, fire sprinklers, and commercial fixtures. Must be tested annually by a certified tester in many jurisdictions.
Annual certified testing of irrigation backflow preventer. Required by most jurisdictions; prevents contamination of potable water supply.
Rolling over freshly sprayed paint to push it into porous surfaces and remove sprayer texture. Required on rough drywall and exterior stucco for proper adhesion.
Wall covering between counters and upper cabinets. Tile, glass, stainless, slabs of stone — protects wall from cooking spatter and water.
A small detached structure for home office. Accessory Dwelling Unit codes vary widely; typically requires permits and impact fees.
The outdoor temperature at which a heat pump's heating capacity equals the home's heat-loss demand. Below the balance point, auxiliary heat runs. Cold-climate heat pumps push the balance point below 5°F.
An HVAC ventilation strategy where equal amounts of stale indoor air are exhausted and fresh outdoor air are supplied, maintaining neutral pressure in the building. Achieved with HRVs, ERVs, or paired fans.
A single-handle faucet using a slotted ball as the valve. Common on Delta-style kitchen faucets pre-2010. Repair kits include springs and seats; cartridge faucets have largely replaced them.
A quarter-turn shut-off valve with a chrome-plated brass ball. The modern standard for main shut-offs and isolation valves; full-port designs maintain full flow.
A tree dug from the field with a soil ball wrapped in burlap. Larger and faster-establishing than container-grown but heavier and pricier.
In fluorescent and HID lighting, an electrical device that regulates current and voltage to start and operate the lamp. LED retrofits eliminate ballasts. In flat roofing, heavy aggregate used to hold down membrane.
A tree or shrub harvested with its root ball wrapped in burlap and a wire basket for transport. Larger sizes are available in B&B form than in containers. Remove wire and burlap at planting.
A historic framing method (pre-1940s) where wall studs run continuously from foundation to roof. Without fire blocking, flames spread rapidly through open stud cavities. A major fire risk in older homes.
The vertical post or spindle that supports a stair railing or deck guardrail. Building code requires balusters be spaced no more than 4" apart to prevent children from slipping through.
The complete railing assembly including top rail, bottom rail, and balusters. Guardrails are required on porches, decks, and stairs with a floor height over 30 inches. Minimum height is 36"–42" depending on the code.
A fast-growing grass processed into flooring planks — harder than most hardwoods when strand-woven. More sustainable than hardwood but more susceptible to moisture damage. Available in horizontal, vertical, and strand-woven constructions.
A tree shipped without soil during dormancy. Cheapest option for fruit and shade trees; plant immediately upon receipt.
Trim molding installed along the base of interior walls to cover the gap between drywall and flooring. Available in MDF (paint-grade) and wood species. Heights range from 2" to 6" or taller for a formal look.
Electric resistance or hot-water heating units mounted at floor level along exterior walls. Hydronic (hot water) baseboard is more efficient than electric resistance. Common in Northeast homes with boiler systems.
The shape of baseboard molding. Common: Colonial, Modern flat, Craftsman, Tall flat. Heights range 3.5" (entry-level) to 7" (luxury).
Water appearing in basements as seepage through walls and floors (hydrostatic pressure), condensation on cold surfaces, or runoff entry through openings. Address exterior grading and downspout diversion before interior systems.
A system of interior drainage channels, a sump pit, and a sump pump that manages water entering through the foundation — redirecting it to the pump rather than letting it accumulate on the floor.
A wall switch with built-in timer (10–60 min) for bathroom exhaust fans. Ensures the fan runs long enough after a shower to clear humidity — code in many jurisdictions for tight new construction.
A ventilation fan that exhausts moisture and odors from bathrooms to the outdoors. Code requires exhaust fans in bathrooms without operable windows. Energy Star fans run more quietly and efficiently.
A plumbing fixture for bathing, available in alcove, freestanding, drop-in, and corner styles. Alcoves are most common (fits between 3 walls). Cast iron tubs retain heat best; acrylic is most affordable.
Vertical strips applied over horizontal siding joints — the 'board and batten' pattern creates a traditional barn or farmhouse aesthetic. Available in wood, composite, and fiber cement.
A solar panel system paired with battery storage — provides power during grid outages. AC-coupled battery systems (Powerwall) work with existing grid-tied solar; DC-coupled systems (Enphase IQ) are more efficient for new installs.
A secondary sump pump powered by a deep-cycle battery in case of power failure or main-pump failure. Strongly recommended in flood-prone basements.
Lithium-ion home batteries (Tesla Powerwall, Enphase IQ Battery, FranklinWH) that supply circuits during outages. Pair with solar to recharge daily; eligible for the 30% federal tax credit.
The percentage of energy stored in a battery that's recovered when discharging. Lithium iron phosphate (LFP) batteries achieve 90–95%.
A window that projects outward from the exterior wall, creating an interior alcove. Typically angled at 30 or 45 degrees from the wall face. Bay windows add square footage, light, and visual interest.
A multi-window assembly projecting from the wall, typically with one center fixed window and two angled side windows. Adds floor area and architectural character.
A bay window group typically consists of a fixed center picture window flanked by two angled casement or double-hung units at 30° or 45°. Structural support (bay window knee wall or cable support) may be required when replacing a flat wall.
A metal or vinyl corner or edge trim that protects and finishes drywall corners and edges. 90-degree corner bead protects outside corners; L-bead and J-bead finish drywall edges at openings and transitions.
A type of paneling with vertical grooves at regular intervals — the classic look of cottage, farmhouse, and traditional kitchens and bathrooms. Available in solid wood, MDF, and PVC; used as wainscoting and cabinet door panels.
Ceiling clad in beaded T&G boards or panels. Cottage and porch ceiling style; can use traditional wood or moisture-resistant PVC.
Tongue-and-groove paneling with vertical bead grooves. Classic wainscot and ceiling material; cottage and country style.
A horizontal structural member that carries load across a span, transferring forces to columns or walls below. Engineered LVL beams are stronger than dimensional lumber and resist warping.
A wall that supports the structural load of the building above it. Removing a bearing wall requires a temporary shoring system, engineered header, and building permit. Identify bearing walls before any remodel.
Professional elimination of bed bugs using heat treatment (most effective), chemical treatment, or a combination. Heat treatment requires raising all areas to 120°F for 90 minutes — kills all life stages including eggs.
A section of sewer pipe that has settled below grade, causing solids to collect and cloggin to recur. Identified by camera inspection; usually requires excavation to repair properly.
A premium U.S. paint brand known for rich pigments and excellent coverage. Aura is their top interior line; Regal Select is mid-tier. Available through independent dealers — not sold in big-box stores.
Loop-pile carpet with flecks of color. Highly durable; budget-friendly option in family rooms and basements. Pulled loops can run when snagged.
A warm-season grass for southern lawns. Tough, fast-growing, sun-loving; goes dormant brown in winter unless overseeded with rye.
A formal price proposal from a contractor for performing specified work. Always get at least 3 written bids and compare scope carefully — the lowest bid may exclude work included in other bids.
A surety bond submitted with a contractor's bid guaranteeing they will sign the contract and furnish required bonds if awarded the work. Common on public projects; less so on residential.
The complete set of documents provided to contractors for bidding a project — including drawings, specifications, bid form, and any owner requirements. Identical packages to all bidders ensure apples-to-apples comparison.
A bathroom fixture or toilet seat attachment that uses water to cleanse after toilet use. Bidet toilet seats cost $30–$800 and require a nearby 120V outlet. Wall-mounted bidets require dedicated plumbing rough-in.
A T-fitting that taps cold water from a toilet supply line for a bidet seat. Often the only plumbing modification needed for bidet seat installation.
A replacement toilet seat with built-in cleansing wand, often with heated seat, dryer, and remote. Installs over an existing toilet; needs a nearby GFCI outlet for electric models.
A solar panel that produces from both front and back. Boost output 5–25% from ground reflectance; common on ground mounts and white commercial roofs.
A linear vegetated channel that conveys and treats stormwater. Used along driveways and parking lots; reduces runoff and pollutant loads.
An IAQ technology that releases positive and negative ions into supply air to neutralize particles and microbes. Independent test results vary widely; ASHRAE recommends caution and confirmed third-party data.
A solid blocking material installed at roof overhangs to prevent birds and pests from nesting in the rafter cavity while still allowing soffit ventilation through the blocking material itself.
A notch cut near the foot of a roof rafter that allows it to sit flush on the wall top plate. The size and angle of the bird's mouth are calculated based on roof pitch and rafter span.
Wastewater containing human waste from toilets and bidets. Requires treatment and cannot be reused for irrigation. Distinct from gray water (sinks and showers), which can be recycled in some jurisdictions.
Category 3 water damage from sewage, floodwaters, or highly contaminated water sources. Requires full PPE, complete removal of affected porous materials (drywall, insulation, carpet), and professional antimicrobial treatment.
A corner cabinet that's hard to access deeply. Pull-out blind corner organizers (Le Mans, Hafele) make remote contents reachable.
Short pieces of lumber installed between studs, joists, or rafters to provide backing for hardware, prevent structural twisting, and act as a fire stop between floor levels.
A roofing failure where wind lifts and separates roofing materials from the deck, typically at the eave or along rake edges. High-wind shingles (Class H or 130 mph rating) resist blow-off in hurricane-prone areas.
The motorized fan inside an air handler that circulates air through the duct system. Variable-speed ECM blowers use up to 75% less energy than single-speed PSC motors and run more quietly at low speeds.
A diagnostic test using a calibrated fan in a door frame that pressurizes the house to measure air leakage. Results in ACH50 (air changes per hour at 50 pascals). Energy-efficient homes target under 3 ACH50.
A diagnostic depressurizing the home to 50 Pa to measure air leakage in cubic feet per minute (CFM50). New construction code targets 3–5 ACH50 nationally.
The indoor air handler or furnace motor that circulates conditioned air through the duct system. ECM variable-speed blowers improve comfort and dehumidification vs. older PSC blowers.
Recycled-newspaper insulation treated with borate fire retardants. Higher R-value per inch than fiberglass; settles ~20% over time — install with extra inches to compensate.
A moisture-resistant drywall panel used as a substrate for veneer plaster systems. Its blue paper facing has higher water resistance than standard drywall and bonds well with finish plaster.
Detailed technical drawings showing plans, elevations, sections, and details for a construction project. Modern blueprints are printed on white paper but the term persists from the historic blue-and-white cyanotype process.
A unit of lumber volume equal to 144 cubic inches (12" × 12" × 1"). Used for pricing rough hardwood lumber. A 2×4 at 8 feet long equals 5.33 board feet.
A fence with overlapping vertical boards. Maximum privacy; uses 30% more material than basic board fence.
A wall-mounted shower jet that targets specific body areas. Multiple body sprays often require larger supply lines (3/4") to maintain flow rates.
A heating appliance that heats water for distribution through radiators or baseboard units (hydronic heat). Gas or propane boilers range 80–95% AFUE efficiency. High-efficiency condensing boilers achieve 90%+ AFUE.
A diaphragm tank that absorbs water expansion as a closed-loop hydronic system heats. Failure causes pressure-relief discharge and short boiler cycles. Verify air pre-charge during annual service.
A short post fixture (3–4 feet tall) lighting walks and patios. Modern aesthetic; often LED with multiple beam patterns.
A thin mortar or adhesive layer applied to a substrate before setting tile, stone, or brick. Using the right bond coat for the substrate (wall vs. floor, wet vs. dry area) is critical to prevent tile failure.
A drain designed for use with sheet waterproofing membranes — the membrane bonds directly to the drain flange. Ensures no leak path between waterproofing layer and drain body.
The practice of connecting all metallic components of an electrical system together to create an equipotential plane, preventing dangerous voltage differences. Required for pools, spas, and all grounded systems.
A conductor that intentionally connects metallic systems (water, gas, ductwork) to the electrical grounding system. Required to provide a low-impedance fault-clearing path.
A primer formulated to adhere to slick or hard-to-paint surfaces — varnish, plastic, glass, glossy paint. INSL-X Stix and Zinsser BIN are the residential gold standards.
An illegal wiring shortcut where the equipment ground terminal is jumpered to the neutral at the receptacle. Defeats GFCI testers, hides ungrounded wiring, and creates shock risks.
A mineral compound (disodium octaborate tetrahydrate) used to treat wood against rot, termites, and wood-boring insects. Penetrates deeply into wood fibers and remains effective indefinitely in dry conditions.
Application of boron-based compounds to wood framing that kills and prevents wood-boring insects and fungal decay. Odorless and low-toxicity — applied as a spray or foam during framing or renovation.
A retaining wall built of large natural boulders. Most natural-looking option; allows for irregular grade transitions; premium pricing.
Excessive floor springiness indicating undersized or damaged floor joists, inadequate blocking, or missing mid-span supports. Often repairable from below with sister joists or support columns without floor demolition.
A curved bay window with 4–6 windows arranged in a gentle arc. More elaborate than a standard bay; provides panoramic views.
A decorative or structural hollow beam formed from flat boards. Decorative box beams mimic heavy timber look on ceilings at a fraction of the cost and weight.
A code-required tally of conductors, devices, and clamps inside an electrical box to verify it isn't overcrowded. Overfilled boxes cause overheating and mechanical damage to insulation.
A built-in gutter integrated into the roof structure. Common on Greek Revival and Italianate homes; expensive to maintain — leak issues require sheet-metal expertise.
A slow-growing evergreen shrub commonly used for formal hedges and foundation plantings. Prune once a year in late winter/early spring to maintain shape. Susceptible to box blight fungal disease in humid climates.
A classic evergreen hedge plant. Boxwood blight is a major disease threat — resistant cultivars include NewGen Independence and Better Boxwood.
A flexible stainless-steel braided hose connecting a fixture to its supply stop. Modern alternative to copper risers; replace every 5–10 years to prevent leaks.
Wiring from a breaker to one or more receptacles or fixtures. Sized by amperage and protected by a matching breaker — 15A circuits use 14 AWG; 20A circuits use 12 AWG copper.
A vent that serves a single branch drain. Multiple branch vents can tie into a common vent before extending to the main vent stack.
Joining copper refrigerant lines using a high-temperature filler rod (typically 15% silver) at 1,200–1,500°F. Forms a leak-tight, vibration-resistant joint. The industry standard for refrigerant piping connections.
A fired clay masonry unit used for walls, pavers, and veneer. Standard modular brick is 3 5/8" × 2 1/4" × 7 5/8". Brick veneer is non-structural — one layer of brick applied to a wood or steel frame building.
Clay brick units for patios, driveways, and walkways. Sand-set on a compacted base; lasts 50+ years with periodic re-sanding of joints.
A single layer of brick applied to the exterior of a wood-frame wall for aesthetic and weather protection, not structural support. Requires a weep hole drainage system at the base to manage moisture.
Wood or metal cross-braces installed between floor joists to distribute loads and prevent lateral movement. Solid blocking is the stronger alternative.
Visible brush strokes in a finish coat. Reduced by using a high-quality brush, thinning paint slightly, and painting in long uniform strokes.
Natural stone with a softened, slightly textured surface. Newer finish that's slip-resistant and shows less wear than polished or honed.
A unit of heat energy — the amount needed to raise one pound of water 1°F. HVAC capacity is measured in BTUs per hour (BTUH). A 2,000 sq ft home typically requires 36,000–72,000 BTUH depending on climate.
A rotary floor sander used between stain and finish coats and for the final pass on refinishing. Lighter than drum sanders; produces the smoothest pre-finish surface.
Locally adopted regulations — typically the IBC, IRC, NEC, IPC, or IMC — that set minimum safety standards for construction, electrical, plumbing, and mechanical systems. Codes vary by jurisdiction and adoption year.
The horizontal main drain inside the building's footprint that collects all branch drains. Connects to the building sewer just outside the foundation wall.
The physical boundary separating the conditioned interior from the unconditioned exterior: walls, roof, foundation, windows, and doors. A tight building envelope is the foundation of energy efficiency.
A licensed government official who reviews permitted work for code compliance at key stages (framing, rough-in, insulation, final). Never cover inspected work until the inspector signs off.
The sequence of applying for a permit, submitting plans, receiving approval, scheduling inspections at key milestones, and obtaining a final approval. Permit timelines range from same-day (small jobs) to 6+ months (large projects in busy municipalities).
The technical discipline that studies how buildings perform as integrated systems — moisture management, energy use, indoor air quality, and occupant comfort. Informs best practices for insulation, ventilation, and weatherization.
The drain line from the building wall to the public sewer or septic tank. Most code authorities transition from 'building drain' to 'building sewer' at the foundation wall.
A storage or furniture piece constructed to fit a specific space and attached permanently to the walls — bookcases, window seats, entertainment centers, and closet systems. Add significant value and functionality compared to freestanding furniture.
A crown molding assembly using multiple stacked profiles for a larger and more decorative look than a single piece. Custom millwork in formal rooms.
A flat roof system using multiple layers of bitumen and reinforcing fabric, topped with gravel or a cap sheet. One of the most durable and long-lasting flat roofing systems, lasting 20–30 years.
A tile with one or two rounded finished edges for use at top edges of wainscot or showers. Order extras — bullnose is often discontinued before field tile.
A wrapped pack of shingles. Most architectural shingles are 3 bundles per square; 3-tab shingles are 3 bundles per square.
A whole-house water shut-off with flow sensor (Flo by Moen, Phyn) that detects abnormal flow and closes the valve. Insurance carriers often discount premiums for installed leak-detection systems.
The copper or aluminum conductor in a panel that distributes current to branch breakers. Aluminum bus bars in some 1960s–80s panels (Federal Pacific, Zinsco) have known failure rates and warrant replacement.
A pipe fitting that reduces an opening from one pipe size to a smaller size. Also refers to an insulating sleeve used to protect wiring where it passes through a metal knockout.
Wood countertops in maple, walnut, or cherry. Warm look; requires periodic oiling. Safe for cutting; not ideal around sinks or dishwashers without sealing.
A transitional room or large alcove between the kitchen and dining room providing extra storage, counter space, and a staging area for serving. Often includes upper and lower cabinets, a sink, and wine storage.
Older armored cable with no separate ground conductor; the metal armor itself acted as the ground path. Found in 1930s–60s homes; replace if disturbed during remodels.
A budget whole-house humidifier that uses the duct system's static pressure to push air across a wet evaporator pad. Less effective than fan-powered models but cheap to install (~$300–$600).
A document issued by the local authority having jurisdiction confirming a new or renovated building is safe and legal to occupy. Required before move-in for new construction and major gut renovations.
Face-frame: traditional cabinets with a 1.5" frame around drawer/door fronts. Frameless (European): no front frame, more interior space and modern look.
A specialty enamel formulated for hard-wearing cabinet surfaces. Top brands: Benjamin Moore Advance, Sherwin-Williams Emerald Urethane, BIN Advanced. Apply with HVLP sprayer for best finish.
Drawer or door handle. Modern: bar pulls 3-12+ inches. Traditional: knobs or bin pulls. Spend up — quality hardware is touched daily for decades.
Replacing cabinet doors and drawer fronts while keeping the existing boxes. Mid-range option between painting and full replacement; typically $4,000–$10,000 for a kitchen.
Sanding, priming, and painting existing cabinets in place. 30–50% the cost of full cabinet replacement; durability depends on prep and primer choice.
The boxes, doors, drawer fronts, and hardware that make up kitchen and bathroom storage. Stock cabinets are pre-built in set sizes; semi-custom offer more options; full custom cabinets are made to exact specifications.
The American National Standards Institute standard for tree support systems. Compliant cabling reduces liability and improves tree-life outcomes.
Measured in megapixels or specific formats (1080p, 4K). 1080p provides good detail for most residential applications; 4K is recommended for large areas or when zooming to identify faces or license plates.
A modern flush mechanism (Kohler Class Five, Toto G-Max) that opens a large port for a stronger flush than traditional flappers. More reliable but more expensive to repair.
A flush-mount LED fixture installed directly in a 4–6 inch hole without a separate housing. Slim profile fits in shallow ceilings; standard for new and remodel installations.
A structural element — beam, floor joist, or balcony — that projects beyond its support without bracing at the outer end. Requires engineering to size properly. Common for deck extensions and bay windows.
The final top layer in a built-up or modified bitumen roofing system, usually granule-surfaced for UV protection. Available in white (reflective/cool roof) or black versions.
An electrical component that starts and runs HVAC compressor and fan motors. Failed capacitors are one of the most common AC repair calls in summer — the unit won't start but the fan may still run. Typically a $150–$300 repair.
A layer of gravel or rigid foam under a slab that prevents moisture from wicking up into the concrete. Required by modern code in cold climates.
A significant alteration, addition, or improvement that materially extends a property's life or adapts it to new uses. Capital improvements add to a property's cost basis and may reduce capital gains tax when the property is sold.
In investment real estate, the ratio of net operating income to property value — used to evaluate rental property returns. A 6% cap rate means the property generates 6% of its value in annual net income.
A composite reinforcing strip epoxied to a foundation wall to stabilize bowing. Installed where bowing is under 2 inches; cheaper and faster than steel I-beam reinforcement.
High-tensile-strength fiber reinforcement bonded to bowing basement walls to halt inward movement without excavation. Cost-effective option for walls that have moved less than 2" from plumb.
A life-safety device that detects dangerous concentrations of CO gas from combustion appliances. Required by code in homes with fuel-burning appliances or attached garages. Replace every 5–7 years.
Large black ants that excavate galleries in moist or damaged wood for nesting — not eating it. Presence indicates a moisture problem (leaks, condensation). Control requires locating the colony and treating the nest directly.
Large bees that bore circular holes in unfinished wood — decks, eaves, and siding — to nest. Females lay eggs in galleries; males are territorial but cannot sting. Treat holes with pyrethrin dust and seal with caulk after the season.
Professional hot-water extraction (steam cleaning) removes deep-set soil, allergens, and odors from carpet fibers. Recommended annually for high-traffic areas; every 18 months for low-traffic rooms.
How tightly packed the carpet fibers are, measured in oz/yd² and stitches per inch. Higher density wears better and feels firmer underfoot.
The pounds-per-cubic-foot weight of carpet padding. 6 lb is minimum residential; 8 lb is recommended; 10+ lb for high-traffic. Higher density = better feel and longer carpet life.
Foam, fiber, or rubber cushion under carpet. Premium 8 lb rebond padding extends carpet warranty; ASHRAE recommends moisture-resistant padding in basements.
The fiber surface of carpet. Cut pile (plush, frieze) feels softer; loop pile (Berber) is more durable. Combined cut-and-loop creates pattern carpets.
Add 5–10% to room measurements for waste and pattern matching. Larger patterns and bedroom carpet runs need more waste allowance.
Re-tightening loose, wrinkled carpet using a power stretcher. Annual maintenance keeps carpets tight and prevents tripping hazards; about $1–$2 per sq ft.
Modular 18"–24" carpet squares with adhesive backing. Easy to replace damaged sections; common in commercial and modern residential basements.
The number of times the carpet fibers are twisted per inch. Higher twist (5+) resists matting and crushing in high-traffic areas.
A white Italian marble with subtle gray veining quarried in Tuscany — one of the most prized natural stone materials for countertops, backsplashes, and bathrooms. Requires sealing every 1–2 years to prevent staining.
A leading HVAC brand under the Carrier Global umbrella. Infinity series represents their top efficiency tier. Carrier invented mechanical air conditioning in 1902 — one of the oldest and most trusted names in HVAC.
A faucet using a replaceable ceramic-disc cartridge as the valve. Drips signal cartridge wear — replace the cartridge instead of the whole faucet.
A pleated-paper or polyester pool filter cartridge. No backwash needed; clean cartridge once per season. Easier to maintain than sand or DE.
A window with a sash hinged at the side and operated by a crank mechanism, swinging outward like a door. Provides excellent ventilation and is easier to clean than double-hung windows. More air-tight than double-hung.
A side-hinged window opened with a crank. The most weather-sealing and breeze-catching window style; best ventilation per opening.
See Allowance — a budget placeholder in a contract for items to be selected later. Be cautious of contractor-set allowances that may be unrealistically low for the finish level you expect.
Decorative trim around interior and exterior doors. Common profiles: Colonial, Craftsman, modern flat, period-specific historical reproductions.
The flat trim molding surrounding a door or window frame, covering the gap between the frame and wall finish. Standard 2 1/4" colonial casing is most common; craftsman-style uses wider flat profiles.
Heavy, durable drain pipe used in older homes. Cast iron is quiet and long-lasting — 50–100 year lifespan — but can eventually corrode and collapse. Camera inspection reveals its condition before purchase.
A traditional hydronic heat emitter found in pre-1960 homes. Long heat-up but excellent radiant comfort. Modern boilers can be retrofitted to old radiators with a primary/secondary loop.
Heavy iron drain piping common in pre-1975 homes. Lasts 50–75 years but corrodes from inside; clay-like scale builds up and reduces flow capacity. Replacement is invasive but long-lasting.
A subgrade pit with a grate that collects surface stormwater and conveys it to a piped drainage system. Also captures debris before it enters the storm sewer.
Water damage from a clean water source — burst supply pipes, appliance supply lines, or overflowing sinks. Least hazardous category but must be dried within 24–48 hours to prevent mold growth and category escalation.
Water damage from gray water containing significant contaminants — washing machine overflow, toilet tank overflow, or sump pump failure. Affected porous materials must be treated or replaced promptly.
A high, vaulted ceiling that follows the pitch of the roof, creating a dramatic open feeling. More difficult and expensive to insulate properly — requires careful air-sealing and often spray foam insulation.
Insulation in vaulted ceilings — either vented (with baffles) or unvented (closed-cell spray foam). Strict code requirements in cold climates to prevent moisture problems.
A flexible sealant used to fill gaps and joints around windows, doors, tubs, and baseboards to prevent air and water infiltration. Available in silicone (best for wet areas), latex (paintable), and polyurethane (structural) formulas.
Painter's caulk filling gaps between trim and walls/ceiling. Latex caulk is paintable; silicone is not — never use silicone where you'll paint.
Caulk for cracks under 1/4"; minimal-expanding foam for gaps 1/4"–1"; backer rod plus caulk for gaps 1–3"; full sheets of rigid foam for larger holes.
Code requires color-matched caulk (not grout) at all changes of plane — corners, tub-to-floor, vanity-to-wall — to allow building movement without cracking grout joints.
A tool holding a cartridge of caulk or sealant and dispensing it through a nozzle using a trigger mechanism. A quality caulking gun with a smooth-rod mechanism and drip stop is essential for clean, consistent beads.
Legal documents that govern what you can and cannot do with your property in a planned community or HOA. Review CC&Rs before any renovation, addition, or exterior change — violations can result in fines or mandatory removal.
Hand-split or sawn wood roofing or siding shingles made from western red cedar. Cedar shakes last 20–30 years with proper maintenance and provide natural insulation properties.
Wood shake roofing — hand-split or sawn cedar. 25–40 year life with maintenance; Class A fire resistance requires pressure-treated cedar in fire-prone regions.
Western red cedar is the traditional premium wood siding option, valued for its natural rot resistance, dimensional stability, and ability to accept stain or paint. Requires cleaning and restaining every 3–5 years.
A flush-mounted ceiling indoor unit common in commercial mini-split applications. Distributes air in 4 directions; requires a ceiling depth of 9–12 inches to recess the body.
The fan-rated box, mounting bracket, and switched circuit installed during framing or as a retrofit upgrade. Skipping fan-rated rough-in is a common code violation.
A security alarm with cellular communication backup if internet or phone fails. Required by code in some commercial occupancies; recommended for homes with monitored systems.
Expanded PVC exterior trim boards that never rot, hold paint well, and dimensionally stable. 20–30% more expensive than wood trim but eliminates rot repairs. Used for fascia, soffit, and exterior trim boards.
Honeycomb-style window shades with insulating air pockets. Adds R-2 to R-4; thermal R-value supplements low-performance windows.
Tile substrate panels (HardieBacker, Durock). Replaces water-resistant drywall behind tile in wet areas; doesn't degrade with moisture.
See Concrete Board — the substrate material behind tile in wet areas. Brands include Durock, HardieBacker, and USG Fiberock. Required by tile installation standards in all wet areas.
A 4-inch on-center faucet with handles and spout pre-mounted on a single base plate. Most common style in mid-range bathroom builds.
A faucet using two ceramic discs as the valve mechanism. The most reliable modern faucet design — often warranted for life. Replace the cartridge if drips develop after years of use.
Tile fired at lower temperatures than porcelain; more porous (0.5–7% absorption). Best for indoor wall and dry-floor installs; not freeze-thaw rated.
CertainTeed's premier roofer certification, required to offer the SureStart PLUS warranty.
A document issued after a final inspection confirming that permitted work complies with applicable codes. Required for certain projects that don't require a full Certificate of Occupancy — like accessory structures and additions.
A document issued by the local building department confirming a building meets code and is safe to occupy. Required before move-in for new construction and major renovations. Ask your contractor to obtain one.
Horizontal trim at chair-back height, traditionally 32–36 inches off the floor. Protects walls from chair damage; visually divides paint colors above and below.
A tool that snaps a straight chalk-powder line across a surface — used to mark cutting lines, tile layout grids, and framing layouts. Essential for any large-area layout task.
A water-based decorative paint with a matte, ultra-low-sheen finish. Annie Sloan and Rust-Oleum are popular brands; mainly used for furniture refinishing.
A fine powder forming on aged exterior paint as the binder degrades. Wash with a chalking-paint formulated cleaner before recoating; otherwise, new paint won't bond.
A written document that modifies the original scope, schedule, or price of a construction contract. Get every change in writing before work proceeds — verbal agreements are unenforceable and lead to disputes.
The price of changes in project scope beyond the original contract. Changes during construction are expensive — 20–50% more costly per unit than the same work included from the start. Define scope carefully upfront.
A concealed vertical or horizontal channel in walls or floors for running pipes, ducts, or electrical conduit. Adding a chase may require framing and drywall work.
A valve that allows fluid to flow in only one direction, preventing backflow. Required on sump pump discharge lines, irrigation backflow preventers, and certain water heater configurations.
A liquid termiticide applied to the soil around and under a foundation to create a long-lasting barrier. Termidor (fipronil) and Altriset provide 10+ year effectiveness. Requires annual inspection for monitoring.
A V-shaped tile or wood pattern made by mitering plank ends. More formal than herringbone; cuts add labor and material waste.
Removing creosote buildup and debris from fireplace flues by a CSIA-certified chimney sweep. Annual cleaning required for wood-burning fireplaces — creosote is highly combustible and responsible for 25,000 chimney fires per year.
Water entry through a chimney's flashing, mortar cap, or deteriorated mortar joints is one of the most common roof leaks. Annual chimney inspection identifies problems early. Waterproof coatings protect porous brick from freeze-thaw damage.
A clay tile, stainless steel, or cast-in-place liner that provides a safe path for combustion gases and protects the masonry. A damaged or missing liner is unsafe for use — required by code for all fireplaces and heating appliances.
The primary sanitizer in most residential swimming pools, killing bacteria, algae, and viruses. Free chlorine should be maintained at 1–3 ppm. Stabilized chlorine (trichlor, dichlor) contains cyanuric acid to reduce UV degradation.
A stainless-steel one-ear clamp for PEX, tightened with a ratcheting tool. Easier in tight spaces than crimp rings; requires special removal cutter to redo connections.
An automatic safety switch that interrupts electrical current when it detects overload or short circuit. Circuit breakers replace fuses in modern panels. AFCI and GFCI breakers provide additional protection.
A circuit breaker that repeatedly trips indicates an overloaded circuit, short circuit, ground fault, or a failing breaker. A repeatedly tripping GFCI outlet indicates a leakage current issue — investigate immediately.
The workhorse of construction cutting — a handheld rotary saw for framing lumber, plywood, and OSB. Typical blade size: 7-1/4". Carbide-tipped blades handle most materials; specialty blades cut tile and metal.
A small electric pump that moves hot water through hydronic loops. ECM circulators (Grundfos Alpha, Taco VR) modulate speed automatically and use 50–80% less power than fixed-speed models.
The voltage at which a surge protector starts diverting current. Lower clamping voltage = better protection. Quality SPDs clamp at 330V or lower for 120V circuits.
The highest fire resistance rating for roofing materials, as tested by ASTM E108. Asphalt shingles, metal roofing, clay and concrete tile all achieve Class A. Required in high-fire-hazard zones in California and other states.
Vitrified-clay sewer pipe used pre-1980. Brittle and prone to root intrusion at joints. Most common pipe material to fail on home-buyer scope inspections.
Premium fired-clay roofing with the longest life of any common roof material. Retains color permanently; weighs 10–15 PSF; expect $1,500–$2,500 per square installed.
Traditional roofing material made from fired clay, providing 50–100 year life and a distinctive Mediterranean appearance. Heavy (9–12 lbs/sq ft) — requires structural assessment before installation. Common in Florida, California, and Texas.
A capped access plug in a drain or sewer line that allows a plumber to insert a snake or water jetter to clear clogs. Required by code at the base of every stack and at regular intervals in horizontal runs.
A removable threaded cap at a drain cleanout opening. Lubricate threads with anti-seize so it can be reopened in a future service call.
A clear waterproofing sealant with little to no UV protection. Cheapest option; reapplication needed every 1–2 years on horizontal surfaces.
A row of windows placed high on a wall above adjacent roof structures to bring natural light deep into a space without sacrificing wall space or privacy. Common in contemporary and passive solar homes.
Floating flooring that locks together via interlocking edge profiles, no adhesive. Standard for laminate and most LVP installs; pulls apart for DIY-friendly removal.
A roof valley where shingles run all the way through and overlap from each side. Cheaper than open valleys; relies on shingle granules for water shedding.
Polyurethane spray foam with rigid, tightly closed cells. R-6.5 per inch; serves as air, vapor, and thermal barrier. Premium pricing; ideal for rim joists and unvented attics.
A valley where shingles from one slope run through and the other slope's shingles are cut 2 inches back from the centerline. Most common modern technique.
The flange at the floor that anchors a toilet and connects to the drain pipe. Cracked or rusted flanges cause toilet rocking and leaks. PVC flanges with metal rings are the modern standard.
Fees paid at the real estate closing by buyers and sellers — including loan origination fees, title insurance, appraisal, attorney fees, and prepaid taxes. Typically 2–5% of the purchase price for buyers.
Natural rounded stone, typically granite, historically used for paving streets. Reclaimed cobblestones are valued for their aged appearance in driveways, walkways, and garden paths. Provides excellent drainage through gaps.
Meeting the minimum standards set by adopted building, electrical, plumbing, mechanical, and energy codes. All permitted work must pass inspections verifying code compliance. Unpermitted work may not be code-compliant.
A ceiling with grid of recessed panels (coffers). Adds dimension and acoustic interest; common in libraries, dining rooms, and studies.
Foam or liquid chemicals formulated to dissolve dirt and biofilm on evaporator and condenser coils. Acidic for outdoor coils; alkaline for indoor coils. Always rinse thoroughly to prevent fin corrosion.
Thin aluminum fins pressed onto copper coil tubes to expand heat-transfer surface area. Bent fins reduce airflow and capacity — straighten with a fin comb. Clean and protect with a fin saver during pressure washing.
An unplanned joint where concrete partially set before more was placed against it. Visible permanent line; weak area. Avoid by maintaining continuous pour rate.
An inverter-driven heat pump engineered to deliver rated capacity down to 5°F and provide useful heat below -10°F. Required by some state utility rebate programs (Maine, Massachusetts, New York) to qualify for incentives.
A horizontal framing member connecting opposing rafters near the peak, preventing the roof from spreading outward under load. Required in the upper third of roof rafters in most framing codes.
A professional service provided by interior designers or paint specialists to select coordinated exterior or interior paint colors. Many paint manufacturers offer online visualization tools and in-store color matching.
Spectrophotometer-based color matching at paint stores using a sample of the existing paint. Modern matching is highly accurate; provide a flat sample at least 1 sq inch.
A measurement from 0–100 of how accurately a light source reveals the true colors of objects compared to natural sunlight. CRI 90+ is recommended for kitchens, bathrooms, and task areas; CRI 80+ is acceptable for most living spaces.
A measure of light hue. Warm white (2,700K) feels cozy; soft white (3,000K) is the kitchen norm; cool white (4,000K) flatters task lighting; daylight (5,000K) is energizing.
A single appliance that provides both space heating and on-demand domestic hot water. Compact and efficient for small homes; cold-water sandwich and limited flow rate are limitations.
A switch with built-in receptacle, pilot light, or USB port in a single device body. Useful in tight kitchen and laundry remodels where stud spacing limits multi-gang boxes.
An electronic instrument that measures O₂, CO, CO₂, and stack temperature to verify a gas appliance is burning safely and efficiently. Manufacturers require analysis at startup on modulating equipment.
A toilet with bowl height of 17–19 inches (vs. standard 14–15 inches), making sit-down and stand-up easier. ADA compliant; preferred by aging homeowners and most new bathroom installs.
A real estate agent's estimate of a property's market value based on recent sales of similar properties in the area. A CMA helps sellers set list price and buyers determine offering price.
Deck boards made from recycled wood fiber and plastic, requiring no sealing, staining, or painting. Top brands include Trex, TimberTech, and Fiberon. 25-year structural warranties are standard.
A fence of wood-and-plastic composite boards. Mid-range pricing; rot-resistant; typical 25-year warranty.
Engineered wood siding (LP SmartSide, Allura, TruExterior) that resists moisture and insects better than solid wood while providing the appearance of real wood. Includes a factory primer coat; requires painting on-site.
A window with frames made from blended materials (Andersen Fibrex, Marvin Ultrex). Performance close to fiberglass at competitive pricing.
Decomposed organic material used to improve soil structure, drainage, and fertility. The ideal soil amendment for planting beds and lawns. Top-dressing lawns with 1/4" of compost annually improves turf density and resilience.
A saw that makes accurate crosscuts and miter cuts at compound angles — essential for cutting crown molding, baseboard, and door casing. Capacity ranges from 10" blades (most common) to 12" for wider boards.
An older faucet design using washers compressed against a seat. Common in pre-1990 homes; rebuild kits cost under $5 vs. cartridge faucet replacements.
A brass fitting that seals a copper or PEX tube using a metal ferrule compressed between a body and nut. Common on shut-off valves and supply stops; never reuse a deformed ferrule.
The component in an air conditioning or heat pump system that compresses refrigerant gas, raising its temperature and pressure so heat can be released outside. Compressor failure is the most costly AC repair.
An add-on capacitor and relay assembly that boosts starting torque on aging single-phase compressors. A short-term fix for tripping breakers on startup — a failing compressor will still need replacement.
Concrete masonry unit — hollow blocks used for foundation walls, retaining walls, and basement construction. Standard 8" × 8" × 16" CMU blocks can be filled with rebar and grout for reinforced construction.
A cement-based panel installed behind tile in wet areas like showers, tub surrounds, and floors. Brand names include Durock, HardieBacker, and Schluter Kerdi. Prevents moisture from reaching wall studs.
A custom concrete countertop with hand-troweled finish. Industrial look; requires sealing; can crack if not reinforced. $80–$150 per sq ft installed.
Injection epoxy or polyurethane for structural cracks; flexible sealant for cosmetic cracks. Hairline cracks are normal; cracks wider than 1/8" or with offset warrant evaluation.
Concrete reaches 70% strength in 7 days, 90% in 14 days, and 100% in 28 days. Light foot traffic 24 hours; vehicles 7+ days; full strength 28 days.
A spray-applied membrane that retains moisture for proper curing. Eliminates the need to wet-cure with burlap or sprinklers; standard on commercial pours.
A thin layer of cementitious or polymer material applied over existing concrete to restore appearance, add color, or create a stamped texture. Costs $3–$7/sq ft vs. $6–$12/sq ft for full replacement.
Manufactured concrete units in various shapes and colors for patios and driveways. Less expensive than clay brick; polymeric sand resists weed growth.
Concrete strength in pounds per square inch at 28 days. Residential standards: 2,500 PSI sidewalks, 3,000 PSI driveways, 4,000 PSI foundations, 4,500–5,000 for cold-climate exposed slabs.
Applying a thin polymer-modified overlay over old concrete to renew the appearance. Hides spalling and minor cracks; typical lifespan 8–15 years.
A penetrating or topical sealer for protecting concrete from staining and freeze-thaw damage. Reapply every 2–5 years on driveways and patios.
The 28-day chemical hydration of new concrete. Most flooring manufacturers require 60–90 days post-pour before installation, regardless of slab feeling dry.
A heavy concrete tile in flat, S, or W profiles. Less expensive than clay; weighs 8–12 pounds per square foot — engineering verification required for retrofits.
A roofing material made from Portland cement, sand, and water, formed into tile shapes. More affordable than clay tile (30–40% less) with a 40–50 year lifespan. Can be painted for color refresh. Heavy — requires engineered roof framing.
An automatic pump that lifts condensate from a basement furnace, AC, or boiler up to a drain. Failure causes water on the floor — a wired safety float should shut off the appliance before flooding.
A small p-trap that catches condensate from a high-efficiency furnace and prevents combustion gases from entering the drain. Clogs with biofilm; flush annually with diluted bleach or vinegar.
Moisture that forms on cold glass surfaces when warm humid indoor air contacts the cold surface. Interior condensation indicates high indoor humidity — run bath fans and check HVAC. Between-pane fogging indicates seal failure.
An NFRC index (0–100) for window resistance to interior condensation. Higher numbers indicate less condensation risk; useful when sizing windows for high-humidity rooms.
The outdoor unit of a central air conditioning or heat pump system that rejects heat to the outside air. Contains the compressor, condenser coil, and fan. Typically replaced as a matched set with the indoor air handler.
The outdoor heat exchanger in an air conditioning or heat pump system where refrigerant releases heat to the outside air. Dirty condenser coils reduce efficiency and can cause compressor failure — clean annually.
The outdoor unit's fan motor that pulls air across the condenser coil. PSC motors are giving way to brushless ECM motors, which use 30–70% less power and modulate speed.
The outdoor portion of a split AC or heat pump containing the compressor, condenser coil, and fan. Keep 24" of clearance on three sides and 60" above; clean leaves and debris from the coil twice a year.
A 90%+ AFUE gas furnace with a secondary heat exchanger that extracts latent heat from flue gases, producing acidic condensate. Requires PVC venting and a condensate drain — never reuse old metal flues.
A lien waiver that takes effect only upon payment being received and cleared — the most common type used at interim payment milestones. An unconditional waiver takes effect immediately upon signing and is used only after payment is confirmed.
An encapsulated crawlspace supplied with HVAC supply and return air. Treated as part of the home envelope; eliminates moisture and IAQ issues common in vented crawlspaces.
A protective tube — metal (EMT, IMC) or plastic (PVC) — that houses electrical wiring. Required in exposed locations like garages and basements in most jurisdictions. Provides physical protection and allows future wire replacement.
A tool used by electricians to bend EMT, IMC, or rigid conduit to precise angles without kinking the conduit. Required for routing conduit around obstacles in exposed electrical installations.
An LED driver that provides a specified amperage (350mA, 700mA, 1000mA) regardless of voltage. Most common driver type in commercial LED fixtures.
An LED driver providing a fixed voltage (12V or 24V). Used for LED tape light and modular cabinet lighting. Add LEDs in parallel up to driver wattage limit.
A joint between two consecutive pours of concrete. Reinforced with rebar or dowels for shear transfer; located at planned stop lines in continuous concrete work.
A tree grown in a nursery pot. Cheaper than B&B but more prone to root-bound issues; check for circling roots before planting.
Insulation applied uninterrupted across framing — typically rigid foam or mineral wool on the exterior. Modern energy code requires continuous insulation in many climate zones to address thermal bridging.
A legally binding written agreement between a homeowner and contractor specifying scope, price, schedule, payment terms, and dispute resolution. Never start work based on a verbal agreement alone.
A planned crack location — saw-cut or tooled into concrete — that controls where shrinkage cracks occur. Required at column lines and approximately every 8–12 feet in slabs.
A reflective roof system (white TPO, light-colored shingles, special granules) that reduces solar heat gain. Required by California Title 24 in some climate zones and incentivized in many cities.
Reflective mineral granules embedded in asphalt shingles that boost solar reflectance to 25%+. Required to qualify for ENERGY STAR shingle ratings.
Turfgrass species (tall fescue, Kentucky bluegrass, perennial ryegrass) that grow most vigorously in spring and fall when soil temperatures are 50–65°F. Planted by seed or sod in the North and transition zones.
A specialty parallel-splice repair using a copper pigtail crimped to aluminum branch wire. Considered the gold standard for aluminum-wiring repair but requires a certified installer.
An interior trim joint where one piece is cut to fit the profile of the adjoining piece. Looks better than mitered inside corners and stays tight as wood moves.
The traditional material for residential water supply lines, valued for its durability, antimicrobial properties, and long service life of 50–70 years. Types M, L, and K refer to wall thickness — Type L is standard for residential.
The thickest-walled copper pipe, used for underground water service and fire-protection. Required by many municipal codes for potable water main runs from the meter to the house.
Standard residential copper water pipe — thicker walled than Type M, accepted in all jurisdictions for in-wall installations. Lasts 50–80 years in non-aggressive water.
Thinner-walled copper water pipe approved for above-grade exposed installation in many areas. Cheaper than Type L but not allowed underground or behind walls in some jurisdictions — verify local code.
A decorative bracket projecting from a wall to support a beam, countertop overhang, or shelf. Available in wood, MDF, stone, and cast metal. Also a structural masonry projection supporting a load above.
A decorative bracket beneath a countertop overhang or mantel shelf — providing structural or visual support. Available in wood, MDF, polyurethane foam, and cast stone. Commonly used to support breakfast bar overhangs.
Dupont's brand of solid surface countertop material made from acrylic polymer and mineral filler. Seamless, integrated sink options available. Scratches can be sanded out. Heat-sensitive — use trivets.
A cylindrical diamond or carbide-tipped bit that drills circular holes through concrete, masonry, or stone — used by plumbers and electricians to pass pipes and conduit through concrete floors and walls.
Flooring made from the bark of cork oak trees — inherently soft, warm underfoot, and acoustically absorbing. Naturally hypoallergenic and antimicrobial. Susceptible to moisture in wet areas and fading in direct sunlight.
The decorative horizontal molding at the junction of a wall and ceiling (interior) or at the roof edge (exterior). A crown molding cornice is one of the most impactful interior finish upgrades.
Wavy or ribbed metal panels — economical agricultural and farmhouse roofing. Exposed-fastener system requires gasketed screws and replacement of gaskets every 15–20 years.
The original purchase price of a property plus the cost of capital improvements — used to calculate taxable capital gains when the property is sold. Keeping renovation receipts reduces tax liability.
A contract structure where the contractor charges actual material and labor costs plus a fixed fee or percentage markup. Provides transparency but can lead to budget overruns if the scope isn't tightly defined.
Metal flashing covering the top of step flashing where it meets a brick or stucco wall. Embedded in a reglet or set into a sealed groove for water-tight integrity.
A metal flashing embedded in mortar joints at a chimney, wall, or skylight that overlaps the base flashing below and prevents water from entering the junction. A common source of roof leaks when corroded or separated.
Chlorinated polyvinyl chloride pipe rated for hot and cold potable water. Solvent-cement joints; brittle when cold. Common in 1980s–2010s Sun Belt construction; being displaced by PEX in new builds.
A waterproof, crack-bridging layer between substrate and tile. Less robust than uncoupling membranes but required for slabs with shrinkage cracks.
Hairline cracks above doors and windows are common settlement cracks, usually cosmetic. Wide horizontal cracks may indicate structural movement. Diagonal stair-step cracks in drywall or masonry indicate differential settlement.
A small heater wrapped around a compressor crankcase that prevents refrigerant migration into the oil during cold-weather standby. Required on heat pumps; 24-hour pre-energization recommended after install.
A flowering tree popular in southern landscapes. Avoid 'crape murder' — the harmful practice of topping branches each spring; prune properly to maintain natural form.
A shallow unfinished area below the first floor of a house, too low for full standing, that provides access to plumbing, wiring, and ductwork. Requires proper vapor barrier and ventilation to prevent moisture and mold problems.
Sealing a crawl space with a heavy-duty vapor barrier on the floor and walls, combined with a dehumidifier, to create a conditioned semi-space. Reduces moisture, mold, pest habitat, and improves HVAC efficiency.
A dedicated dehumidifier in encapsulated crawlspaces, sized for the crawlspace cubic footage. Maintains 50–55% RH to prevent mold and structural decay.
A 10–20 mil polyethylene sheet across the crawlspace floor and up the walls. Required in encapsulation; reduces ground-source moisture by 90%+.
A measure (0–100) of how accurately a light source renders colors. CRI 90+ is recommended for kitchens, art rooms, and bathrooms; CRI 80 is acceptable for general areas.
A small peaked structure built behind a chimney or vertical wall on a sloped roof to divert water around the obstruction. Required by code when a chimney is wider than 30 inches at the upper roofline.
A small peaked saddle behind a chimney that diverts water around it. Required by code on chimneys wider than 30 inches when measured perpendicular to the slope.
A copper-ring crimp connection for PEX tubing using a calibrated crimping tool. Reliable and inexpensive; verify each crimp with a Go/No-Go gauge to prevent failures.
A short stud above a header or below a window opening. Maintains stud spacing for sheathing and drywall fastening.
A subpanel fed by a battery or generator that powers selected essential circuits during an outage — fridge, lights, internet, well pump. Cheaper than backing up the entire main panel.
A retrofit valve under a remote sink that connects hot and cold lines briefly until hot water arrives. Used with demand or timed recirculation pumps to avoid running dedicated return lines.
Pruning to remove dead, diseased, or weakly attached branches. Annual maintenance for mature shade trees; reduces storm damage risk.
Decorative trim where the wall meets the ceiling. Sized 3–8 inches in residential; install with coped joints for clean inside corners.
Decorative trim at the top of cabinets to ceiling. Adds custom-built look; varieties include simple cove, ogee, and stacked profiles.
Installing the angled decorative trim at the wall-ceiling junction. Outside corners are mitered; inside corners are coped (one piece mitered, the other back-cut to fit against it). Requires precise angle measurement for professional results.
Pruning to reduce overall tree size while maintaining natural form. Recommended over topping for safety pruning; preserves tree health.
A condition where wood floor boards bow concave across their width — edges higher than the center — typically caused by excessive moisture from below. Must address moisture source; may need sanding after the floor stabilizes.
The attractiveness of a property as seen from the street — driven by landscaping, paint color, front door, lighting, driveway, and siding condition. High curb appeal correlates with faster sales and higher offer prices.
A barrier-free shower with the floor flush with surrounding bathroom flooring. Requires linear drain and proper waterproofing slope; ideal for ADA-accessible baths and modern aesthetics.
The process by which concrete, mortar, epoxy, or grout gains strength through chemical reactions. Concrete should be kept moist for 7 days after pour; full strength is reached at 28 days. Rushing the cure leads to cracking.
Wood trim, moldings, built-ins, and architectural elements fabricated to custom specifications by a millwork shop. More expensive than stock profiles but allows exact matching of historic profiles or unique dimensions.
Painting wall edges and corners with a brush before rolling the field. Creates clean lines at trim, ceilings, and inside corners. Skill-intensive but eliminates the need for tape on most jobs.
Painting the edges, corners, and trim lines of a wall or ceiling with a brush before rolling the field area. Professional painters cut in freehand; beginners use painter's tape. Good cut-in work defines the quality of the finished job.
A pool chemical that protects chlorine from UV degradation, extending its effective life in outdoor pools. Ideal range: 30–50 ppm. Over 80 ppm renders chlorine ineffective — requires partial drain and refill to reduce.
The maximum number of heating or cooling cycles per hour a thermostat allows. Defaults to 3 CPH for AC and 5 CPH for gas heat; adjust in the installer settings if comfort suffers.
A standard residential lockset with a key and turn cylinder going through the door face. The dominant residential lock type — easy to install and replace.
A Japanese HVAC manufacturer known for high-efficiency mini-split and central systems. Daikin manufactures the most high-efficiency mini-split compressors and components in the industry. Strong warranty support.
Compensation for a contractor or tradesperson based on a set rate per day of work rather than a fixed project price. Common for handymen and consultants. Ensure the scope of work justifies the day rate before agreeing.
Wiring multiple receptacles in series using both terminal screws. Allowed but failure of one device interrupts downstream outlets. Pigtailing each device is a more robust approach.
Digital Addressable Lighting Interface — a digital control protocol allowing individual fixture control over a shared bus. Common in commercial lighting and high-end residential.
A movable plate inside a chimney or duct that controls airflow. Fireplace dampers should be closed when not in use to prevent heat loss. HVAC zone dampers control airflow to individual rooms.
The number of days a property has been listed for sale. High DOM relative to the local market average may indicate overpricing or condition issues. Properties that sell quickly often indicate underpricing.
A battery connected to the DC side of a solar system, before the inverter. More efficient for solar charging; requires hybrid inverter.
A DC-DC converter on each panel pairing with a central string inverter. Compromise between string and microinverter — addresses shading without per-panel inverter cost.
Dynamic Coefficient of Friction — tile slip resistance. ANSI A137.1 recommends ≥0.42 for residential floors and ≥0.60 for showers and pool decks.
Diatomaceous Earth filter providing the finest pool filtration. Requires backwash and DE recharge after each cleaning. Premium choice for clear water.
The static weight of permanent structural components — framing, roofing, drywall, and mechanical equipment. Structural calculations must account for dead load plus live load (people, furniture, snow) to size beams and footings.
A keyed lock independent of the door knob. Single-cylinder deadbolts have a thumb-turn inside; double-cylinder require a key inside and out — banned in some jurisdictions for fire-egress reasons.
Metal or membrane flashing at the ledger board where a deck attaches to the house, preventing water infiltration behind the siding. Improperly flashed ledger connections are the most common cause of deck rot.
The horizontal board attached to the house band joist or rim joist that supports one end of the deck's structural frame. The most critical structural connection on a deck — must be properly bolted and flashed.
A specialized exterior paint or coating for horizontal wood surfaces exposed to foot traffic, UV, and moisture. Deck stain penetrates the wood; deck paint sits on the surface. Stains last longer; paints provide more color options.
The vertical structural column that supports the deck beams and frame. Set in concrete footings that extend below the frost line. 6×6 posts are standard for residential decks; post bases allow concrete top-setting for rot prevention.
A penetrating stain for exterior wood decks. Solid, semi-transparent, and clear formulas vary in UV protection; reapply every 2–4 years per product spec.
Hidden fasteners or face screws used to attach decking boards to the frame. Hidden fastener systems (Tiger Claw, Camo) eliminate surface screw holes for a cleaner appearance. Stainless steel fasteners resist corrosion in coastal environments.
The rectangular paddle-style switch and outlet form factor (Leviton Decora). Visually preferred over toggle switches; matches modern wall plates and trim.
Crushed stone or river rock used as ground cover in landscaping beds and paths. Lower maintenance than mulch — doesn't decompose or blow away. Pea gravel, decomposed granite, and river rock are popular choices.
A circuit serving only one appliance or load — required by code for ranges, dryers, refrigerators (in many cases), microwaves, dishwashers, and bathroom receptacles.
The bending or sagging of a structural member under load. Building codes limit floor deflection to L/360 — meaning a 12-foot span can deflect no more than 1/2". Excessive deflection causes cracked tile and squeaky floors.
The control board on a heat pump that initiates defrost cycles based on outdoor coil temperature, time, or demand. Faulty defrost boards cause coils to ice over and dramatically reduce winter heating output.
An automatic mode where a heat pump temporarily reverses to cooling to melt frost off the outdoor coil during cold-weather operation. Brief steam from the outdoor unit is normal during defrost — not a malfunction.
A heating element in heat-pump base pans that prevents condensate ice buildup that could damage the pan or block airflow. Required on cold-climate heat pumps in heavy-snow regions.
The use of commercial dehumidifiers during water damage restoration to remove moisture from building materials. Professional equipment removes 80–200 pints of water per day — far more than consumer units.
A thermostat or smart-thermostat feature that overcools slightly or runs the AC in low-fan mode to pull more moisture from indoor air. Useful in humid climates during shoulder seasons.
An appliance that removes excess moisture from indoor air. Whole-home dehumidifiers connect to the HVAC system ($1,500–$3,000 installed); portable units handle single rooms. Recommended when indoor RH exceeds 50%.
A defrost-control method that initiates defrost only when sensors detect frost buildup, rather than on a fixed time interval. Reduces unnecessary defrost cycles and improves heat-pump efficiency.
A code-allowed reduction on calculated load based on usage diversity. For example, only 75% of multiple appliance loads are counted simultaneously per NEC 220.82.
An on-demand recirculation pump activated by a button or motion sensor at the fixture. Heats the supply piping just before use — saves more water than continuous recirculation with less energy.
A heavy-duty electric or pneumatic tool for breaking concrete, tile, and masonry. Also called a jackhammer or chipping hammer. Rotary hammers (SDS) combine drilling and hammering for anchor installation.
A fiberglass-faced gypsum panel by Georgia-Pacific used as a weather-resistant substrate behind stucco, stone veneer, and other exterior claddings. More moisture-resistant than traditional OSB sheathing for these applications.
An upfront payment to a contractor before work begins. Never pay more than 10–15% upfront on large projects — most legitimate contractors don't require large deposits. Match payment milestones to completed work.
Generic name for premium pure whites used by designers. Sherwin-Williams Pure White, Benjamin Moore Simply White, and BM Chantilly Lace are most common.
Removing accumulated dead grass mat (thatch) from a lawn. Improves water and air penetration; better as power-rake before overseeding than annual maintenance.
A structural element installed at an angle to resist racking forces (lateral loads from wind and earthquakes). Can be wood let-in bracing, metal strap bracing, or structural sheathing panels.
A pipe fitting with a plastic insulator that separates dissimilar metals (copper to galvanized) to prevent galvanic corrosion. Required by code at most water heater connections.
The grille-like cover over a supply air register that distributes conditioned air into a room. Adjustable diffusers allow you to direct airflow; high-flow diffusers can also reduce HVAC noise.
Standard cut lumber sold in nominal sizes (2×4, 2×6, etc.) that are smaller than the stated dimensions — a 2×4 actually measures 1.5" × 3.5". Used for framing, decking, and trim applications.
A switch that varies LED, halogen, or incandescent fixture brightness. Use only LED-rated dimmers with LED lamps; non-rated dimmers cause flicker, buzz, or premature LED failure.
Carpet adhered directly to the subfloor without padding. Common in commercial, basements, and rolling-load applications; reduces carpet life vs. stretched-in installs.
A sealed-combustion furnace that draws combustion air directly from outside through a dedicated PVC pipe. Required in tight homes and bedrooms — eliminates backdrafting risk from CO and combustion-air starvation.
The hot, high-pressure vapor line connecting the compressor outlet to the condenser inlet. Operates at 150–250°F — never insulate; the heat must reject to ambient air through the line and condenser coil.
A weatherproof outdoor switch within sight of an air-conditioning unit that allows safe service shut-off. Required by NEC 440.14; usually fused or non-fused depending on equipment nameplate.
A lockable switch that safely isolates HVAC equipment, generators, or subpanels from power, allowing safe servicing. Required within sight of the equipment it disconnects.
An appliance that automatically washes dishes using a high-temperature water spray and detergent. Energy Star dishwashers use as little as 3.5 gallons per cycle vs. 27 gallons for hand washing. Requires 20A circuit and hot water connection.
A small concrete chamber that splits septic-tank effluent equally among multiple drainfield laterals. A tipped or damaged D-box overloads one trench and prematurely fails the field.
A polyethylene uncoupling membrane by Schluter Systems installed between the substrate and tile to prevent cracking from movement. Eliminates the need for backer board on many substrates and speeds up mortar cure time.
A valve that redirects flow between tub spout, showerhead, hand-held wand, or body sprays. Either integrated with the mixing valve or as a separate trim component.
The internal construction of a door — hollow core (cardboard honeycomb), solid core (composite), or solid wood. Solid-core doors provide better sound isolation (STC 35–40) vs. hollow-core (STC 20–25) for interior applications.
The removable pin in a door hinge. Lift out to remove a door for painting or moving furniture. Use security hinges with non-removable pins on outward-swinging exterior doors.
The vertical side member of a door frame. When a door sticks or doesn't latch, checking jamb plumb and the hinge gaps is the first diagnostic step. Settlement or moisture can cause jambs to rack out of square.
Same as slab door — the panel without frame, hinges, or hardware.
A flexible bottom seal on the door's lower edge. Replace at sign of wear (light visible under door); seals out dust, drafts, and pests.
A video-enabled doorbell that provides live streaming, motion alerts, and two-way audio via smartphone app. Ring, Nest, and Arlo are leading brands. Requires existing doorbell wiring or a battery-powered option.
A roofed structure projecting vertically from a sloping roof, containing a window. Dormers add light, ventilation, and headroom to attic spaces. Types include shed, gable, hip, and eyebrow dormers.
An entry door system with two equal-width swing doors. More dramatic than a single door with sidelights; allows wider passage for furniture.
A window where both sashes slide up and down. The traditional U.S. window style; both sashes tilt in for cleaning on modern units.
A window with two layers of glass and a sealed air or argon gap. Standard for new construction and replacement; 50% lower U-factor than single-pane.
A 240V breaker that occupies two slots in a panel and trips both phases simultaneously. Used for 240V loads — water heaters, dryers, ranges, AC units, EV chargers.
A drawer box with interlocking dovetail joinery. Premium construction; standard on quality cabinets vs. stapled or glued joints in budget cabinets.
A vertical pipe that carries rainwater from the gutter down to the ground. Should discharge at least 4–6 feet from the foundation. Extensions or underground drains direct water further away.
Vertical pipe carrying water from gutters to grade. Standard sizes: 2"×3" and 3"×4". Larger downspouts handle heavier rains and clog less.
A pipe or splash block that directs water 4–10 feet away from the foundation. The simplest and cheapest fix for wet basements and foundation cracking.
Clearing blockages in drain pipes using mechanical snakes, hydro-jetting, or chemical treatments. Hydro-jetting ($250–$500) fully scours pipe walls while snaking only punches a hole through the clog.
A flexible cable with a cutting tip used to clear drain clogs. Hand augers clear sink and tub drains; powered drum augers handle toilet and sewer line blockages. Hydro-jetting is more effective for persistent clogs.
A flexible cable used to clear drain clogs. Hand augers handle sinks; drum and sectional augers clear larger lines; powered cable machines clear sewer mains up to 4" diameter.
The main vertical drain pipe carrying wastewater from upper floors to the building drain. Extends upward through the roof as the vent stack.
Perforated pipe embedded in gravel around the foundation perimeter that collects and redirects groundwater away from the structure. Also called a French drain or footing drain. Essential in high-water-table areas.
Housewrap with creases or bumps creating a drainage gap behind it. Required by code in some states for stucco and reservoir cladding to manage trapped moisture.
A perforated drain pipe behind a retaining wall in gravel backfill. Critical to prevent hydrostatic pressure; failed drainage causes wall failure.
A graded ditch directing surface water away from buildings. Sized by anticipated peak flow; lined with grass or rock based on velocity.
A network of perforated pipes in gravel trenches that distributes septic effluent for soil treatment. Lifespan 20–30 years with proper maintenance and no surface compaction.
A payment schedule tied to project milestones — foundation complete, framing complete, rough-in complete, etc. Protects both parties by aligning payment with verified progress. Require photos or inspections before each draw.
Slide adjustments allowing fine-tuning of drawer alignment. Most modern slides offer 3-way adjustment after install.
A metal or PVC flashing installed over windows and doors to direct water away from the opening. Critical for preventing moisture damage to window frames and wall sheathing.
Metal flashing along eaves and rakes that directs water into the gutter and away from the fascia. Required by 2012+ IRC; replace if rusted during reroofing.
A pressure-compensating drip-irrigation outlet. Common flow rates: 0.5, 1, 2, or 4 GPH. Match emitter to plant water requirement.
A low-flow irrigation system delivering water directly to plant roots. Saves 30–50% over spray irrigation; ideal for landscape beds and gardens.
The individual low-flow devices (0.5–2 GPH) in a drip irrigation system that deliver water directly to plant root zones. Available in pressure-compensating versions that ensure consistent flow regardless of pipe pressure variation.
The outer edge of a tree's canopy when projected to the ground. The minimum protection zone during construction; many roots extend beyond.
A downward bend in service conductors at the weatherhead that prevents rain from following wires into the panel. A simple but critical detail in overhead service entries.
A galvanized or aluminum pan beneath a water heater that catches a tank-failure leak. Required by code in upstairs or attic installations; pan must drain to a conspicuous location.
1/2" polyethylene tubing in drip systems. Stake to grade or bury; emit through punched-in emitters at each plant.
A faucet that drips 60 drops per minute wastes 2,100 gallons per year. Cartridge faucets (most modern faucets) need a new cartridge; compression faucets (older) need new seat washers. An affordable DIY repair.
A projecting molding above a door or window on masonry construction that sheds rainwater away from the opening. Also called a drip cap — used on wood-framed buildings above doors and windows to prevent water infiltration.
The electronic ballast that powers an LED fixture. Driver failure is the most common LED-fixture issue — replace the driver, not the entire LED chip when possible.
The flared section of a driveway that meets the public street. Permits required in most jurisdictions; municipal specs apply at the public right-of-way.
A flexible sealant filling asphalt driveway cracks before sealcoating. DIY-friendly; cheaper than a full driveway resurface.
Removing and replacing a driveway. Concrete: 30–40 year life, $8–$15 per sq ft. Asphalt: 20–25 year life, $5–$10 per sq ft. Pavers: 50+ year life, $15–$30 per sq ft.
A suspended grid ceiling with removable acoustic tiles. Common in basements; allows easy access to overhead plumbing and electrical.
Canvas or plastic sheet protecting floors and furniture from paint drips. Heavy canvas is preferred — plastic stays slick and shows footprints.
A sink dropped into a counter cutout with a rim above the surface. Lower cost; works with laminate counters; rim catches debris during cleanup.
A large rolling sander used for the bulk of floor refinishing. Aggressive — improper handling creates dishing and chatter. Typically left to professionals or experienced DIYers.
A landscape feature using river rock to channel storm runoff. Functional drainage that doubles as decorative element.
Gas dryers ($50–$100 cheaper to operate annually) require a 120V outlet for controls, 3/4" gas line, and metal exhaust duct. Electric dryers require a 240V/30A dedicated circuit. Both need a properly sealed and cleared exterior vent.
The duct system exhausting hot, moist air from a clothes dryer to the outdoors. Lint buildup is the #1 cause of home dryer fires — clean annually with a long brush or professional service. Use rigid metal duct, not flexible foil.
The time required to restore a water-damaged structure to pre-loss moisture content. Typically 3–5 days with commercial equipment. Drywall and framing moisture is measured daily with a pin or pinless moisture meter.
Gypsum plaster sandwiched between paper facing, used to finish interior walls and ceilings. Standard thickness is 1/2" for walls and 5/8" Type X (fire-rated) for garage ceilings. Also called gypsum board, wallboard, or sheetrock.
A fastener designed to support weight in hollow wall cavities where hitting a stud isn't possible. Toggle bolts handle the heaviest loads (TVs, shelving). Plastic anchors are only suitable for light pictures.
The ASTM/GA-214 standard defines drywall finishing levels 0–5. Level 5 (skim coat) is required for critical lighting, high-gloss paint, and wallcovering. Most residential walls receive Level 4; ceilings may receive Level 3 or 4.
A wheeled mechanical lift for installing ceiling drywall. Eliminates the need for two-person ceiling installations; rentable from most home centers.
A self-adhesive mesh or aluminum patch covering small drywall holes. Apply joint compound over the patch in 2–3 coats, sand smooth, and prime before paint.
Same as PVA primer — formulated to even out the porosity difference between drywall paper and joint compound for uniform topcoat appearance.
A flexible foam sanding tool for feathering joint compound edges. Less dust than traditional sandpaper; useful for inside corners.
Hardened screws with bugle heads designed to embed in drywall paper without breaking through. 1-1/4" for 1/2" drywall; 1-5/8" for 5/8" drywall.
Paper or fiberglass mesh tape covering drywall joints. Paper requires multiple coats; mesh is faster but slightly weaker on butt joints.
Standard interior wall: 1/2". Ceilings: 5/8" reduces sag, especially with 24" framing. Garages and party walls: 5/8" Type X for fire rating.
A subgrade pit or proprietary chamber that allows stormwater to infiltrate into the soil rather than discharge to a storm sewer. Common in jurisdictions that limit runoff to municipal systems.
Termites that live and feed entirely within dry wood without soil contact — common in coastal areas and the Southwest. Require fumigation (tent tenting) or localized treatments unlike subterranean termites.
A heat pump paired with a gas furnace as backup heat instead of electric strips. The thermostat switches between sources based on outdoor temperature for maximum operating cost efficiency.
A breaker or receptacle providing both arc-fault and ground-fault protection in one device. Increasingly common in new construction kitchen and laundry circuits.
A combined capacitor with separate terminals (HERM, FAN, C) serving both the compressor and condenser fan motor. A common low-cost replacement part — match microfarad and voltage exactly.
A toilet with two flush volumes — typically 0.8 GPF for liquid and 1.6 GPF for solid. Saves 20–67% on water vs. legacy 3.5 GPF toilets. Required in many drought-prone jurisdictions on new installs.
A pressurization test of duct system airtightness. Code in many states requires duct leakage testing on new construction; typical target is 4 CFM25/100 sq ft conditioned area.
A rigid insulated duct panel made from fiberglass or foam used to fabricate rectangular duct sections on-site. Provides insulation and prevents condensation on the duct exterior without requiring separate insulation wrap.
Insulation wrapped around or applied inside HVAC ducts to prevent heat gain and loss as conditioned air travels from the unit to the rooms. Ducts in unconditioned attics should be insulated to R-8 minimum.
Fiberglass mat bonded to the inside of metal ductwork to provide insulation and sound absorption. Reduces noise transmission from the HVAC system. Must be installed smoothly to avoid airflow restriction.
A flexible paste-like sealant applied to ductwork joints to prevent air leakage. More durable than tape alone. Sealing ducts with mastic improves HVAC efficiency by 20–30% in most homes.
Sealing duct joints with mastic or aerosol sealant (Aeroseal). Reduces air-handler workload; typical homes lose 20–40% of conditioned air through leaky ducts.
Fiberglass blanket installed over sheet-metal ducts in unconditioned space. Standard R-6 or R-8; FSK foil-scrim-kraft facer serves as the vapor barrier.
A slim concealed-duct indoor unit served by a ductless outdoor condenser. Provides multi-room coverage from one head while keeping the architectural cleanliness of conventional ducted systems.
The system of metal or flexible tubes that distributes conditioned air from the HVAC unit to rooms throughout a home. Leaky, uninsulated, or improperly sized ductwork can waste 25–40% of HVAC energy.
A standard electrical outlet with two receptacles, rated at 15 or 20 amps. Modern codes require tamper-resistant receptacles in all new residential installations. Bathrooms, kitchens, and outdoor locations require GFCI protection.
Drain-Waste-Vent — the entire piping system that carries wastewater out and vents sewer gas to the roof. Properly designed venting prevents trap siphoning and gurgling drains.
A good-faith deposit from a buyer when making a real estate offer — typically 1–3% of the purchase price. EMD is held in escrow and applied to the down payment at closing. May be forfeited if the buyer breaches the contract.
A legal right for a third party to use a portion of your property for a specific purpose — utility easements, drainage easements, access easements. Easements run with the land and affect what you can build in those areas.
The lower edge of a roof, including the overhang projecting beyond the wall. Soffit, fascia, drip edge, and gutters all live at the eave.
Drip edge along the bottom edge of a roof. Combined with ice-and-water shield, prevents water from wicking up under shingles into the fascia.
Electronically Commutated Motor — a brushless DC motor with built-in variable-speed control. Standard on premium HVAC equipment; uses 60–75% less electricity than equivalent PSC motors.
A Canadian smart thermostat brand known for its SmartSensor system that detects temperature and occupancy in multiple rooms. Alexa built-in, strong energy reporting, and ENERGY STAR certified.
A system that uses outdoor air for cooling when outdoor conditions are suitable, reducing compressor runtime. Required by energy codes in commercial buildings in many climates; also available for high-efficiency residential systems.
Decorative or matching tape applied to plywood cabinet edges. Iron-on for DIY; pre-glued PVC banding standard for shop production.
Decorative edge: eased (slight bevel), bullnose (rounded), ogee (S-curve), waterfall (counter wraps to floor). Affects price.
A handheld disc sander used along walls where the drum sander can't reach. Match the edger grit to the drum sequence to avoid visible perimeter rings.
A defined border between lawn areas and planting beds installed with steel, aluminum, plastic, or natural stone edging to create a crisp, clean line and prevent grass from invading beds.
Older terminology for a multi-wire branch circuit — two hots and a shared neutral. The shared neutral can overheat if circuits aren't on opposite phases.
A computer-controlled refrigerant metering device used in inverter, VRF, and high-efficiency systems. Adjusts orifice size in real time for tight superheat control and improved part-load efficiency.
White mineral residue on concrete and brick from soluble salts migrating to the surface. Cosmetic in concrete; in masonry it indicates moisture intrusion to investigate.
White salt deposits on basement or crawl space walls indicate groundwater migrating through the masonry. Scrub off the deposits, then address the moisture source — exterior grading, downspout discharge, or foundation drainage — to stop recurrence.
A subtle low-sheen finish with light reflectance. The most common interior wall sheen — washable enough for living areas without showing imperfections.
A legally required means of exit from a building or room. Bedrooms below grade require egress windows with a minimum 5.7 sq ft net opening. Basements converted to living space require egress windows for code compliance.
A window well for a basement egress window. Must include a permanent ladder or steps and code-required minimum dimensions to allow escape.
A window meeting code minimum opening dimensions for emergency escape. Required in every basement bedroom — minimum 5.7 sq ft opening, 24" tall, 20" wide.
A thick, flexible exterior coating that bridges hairline cracks in stucco and concrete block. Premium product for hot, sunny climates; not for wood siding.
The main distribution board that receives electricity from the utility and distributes it to branch circuits throughout the home. Modern homes require 200-amp service to support EV chargers, heat pumps, and high-load appliances.
A burning or fish-like odor from outlets, panels, or switches is a serious warning sign of overheating wiring, failing insulation, or arcing connections. Turn off the circuit immediately and call an electrician.
Rigid or flexible tubing that protects and routes electrical wiring. EMT (electrical metallic tubing) is used in exposed areas; flexible conduit connects appliances requiring movement. Required in garages and unfinished spaces by most codes.
An engineering assessment of a home's total electrical demand to ensure the service entrance, panel, and wiring are adequately sized. Required when adding major loads like EV chargers or electric ranges.
A permit required for virtually all electrical work beyond replacing fixtures — including panel upgrades, circuit additions, subpanels, and EV charger installations. Permits trigger inspections that verify safe, code-compliant work.
An ionizing whole-house air cleaner that charges and collects particles on metal plates. Effective on smoke and fine dust but requires monthly cleaning to maintain performance.
A washable air filter that uses static charge to attract dust. Catches large particles well but rarely tests above MERV 4–6. Cleanability appeals to budget-conscious homeowners.
A thermostat mode that bypasses the heat pump compressor and runs only the auxiliary electric or gas heat. Used when the heat pump fails — running 'EM heat' continuously results in much higher utility bills.
The valve or switch that immediately stops the flow of water, gas, or electricity to a specific appliance or the entire home. Locate and test all shut-offs before an emergency occurs.
Invisible fields of energy from electrical current flow in wires and devices. Sources include power lines, electrical panels, and wiring. Currently no scientific consensus on health effects from household EMF levels.
Electrical Metallic Tubing — thin-wall steel conduit. Common for exposed branch wiring in basements, garages, and commercial spaces. Connected with set-screw or compression couplings.
A sealed and insulated crawlspace with a continuous vapor barrier on floor and walls, dehumidifier, and conditioned air supply. Eliminates moisture-driven IAQ and durability problems.
The cross-section of wood exposed when cut perpendicular to the grain direction. End-grain wood blocks used in butcher blocks and some wood floors are extremely durable and reveal the annual growth rings.
Building code requirements for energy efficiency in new construction and major renovations — governing insulation levels, window performance, duct sealing, HVAC efficiency, and lighting. The IECC (International Energy Conservation Code) is the national model code.
A ventilation unit that exchanges stale indoor air for fresh outdoor air while recovering 70–80% of the energy (heat and moisture) from the outgoing air stream. Ideal for hot, humid climates.
A joint EPA and DOE certification program identifying energy-efficient products including appliances, HVAC equipment, windows, and lighting. ENERGY STAR-certified products use 10–50% less energy than standard models.
A window meeting ENERGY STAR climate-zone-specific U-factor and SHGC limits. Required to qualify for many federal and state energy tax credits and utility rebates.
Flooring with a real-wood top veneer over plywood backing. More dimensionally stable than solid wood; suitable for basements, slab installations, and over radiant floor heat.
Structural wood products manufactured by binding wood strands, fibers, or veneers with adhesives for superior strength and dimensional stability. Includes LVL beams, I-joists, and parallel strand lumber (PSL).
Flooring with a real wood veneer bonded over plywood layers, providing dimensional stability. Can be refinished 1–4 times. More suitable than solid hardwood over radiant heat and in below-grade installations.
Enphase's modular AC-coupled battery, sized 5–10 kWh per unit. Compatible with most existing solar systems; integrates with Enphase microinverters.
A label program from the U.S. Environmental Protection Agency identifying water-efficient fixtures that use at least 20% less water than standard. WaterSense toilets (1.28 GPF vs. 1.6 GPF) qualify for utility rebates in most markets.
Ethylene Propylene Diene Monomer — a black or white synthetic rubber sheet for low-slope roofs. Adhered, ballasted, or mechanically fastened. Long-proven; 30–40 year lifespan.
Ethylene Propylene Diene Monomer — a durable rubber membrane for flat and low-slope roofing. EPDM lasts 25–35 years, is highly UV-resistant, and is one of the most cost-effective flat roof systems.
A two-part epoxy coating for garage floors and basements. Excellent chemical resistance; proper concrete prep (grinding, etching) is critical for long-term adhesion.
A two-part epoxy grout that's stain- and crack-resistant. More expensive than cement grout and tougher to install but virtually maintenance-free.
A repair method where liquid epoxy is injected under pressure into concrete cracks, bonding the crack faces together and restoring structural integrity. Best for non-moving cracks in dry conditions.
Expanded Polystyrene — white beadboard. R-4 per inch; cheapest rigid foam. Common under concrete slabs and in budget exterior wall systems.
The moisture level wood reaches when in balance with the surrounding humidity. Acceptable installation EMC depends on climate — typically 6–9%.
The bare or green wire in branch circuits that bonds metal equipment to ground. Provides the low-impedance fault path that allows breakers to trip.
A ventilation device that pre-conditions incoming fresh air using exhaust air's heat AND humidity. Best in humid climates where you want to retain or reject moisture.
A pruning technique training trees to grow flat against a wall or trellis. Common with apple, pear, and ornamental fruit trees in formal gardens.
A 240V/32–48A home charging station for electric vehicles, providing 15–30 miles of range per hour. Installation requires a dedicated 240V circuit and typically costs $700–$1,800 with a licensed electrician.
A controller that limits or modulates EV charger draw based on real-time panel load. Allows adding an EV charger without service upgrade — recognized in 2023 NEC Article 750.
Pulling deep vacuum on a refrigerant circuit to remove moisture and non-condensables before charging. ACCA/AHRI best practice is below 500 microns held for 10 minutes — moisture left in a system causes acid formation.
A whole-house cooler that pulls hot, dry outdoor air through wet pads, evaporating water to drop temperature 15–25°F. Effective only in dry climates (humidity below 30%) — common in the Southwest.
The indoor coil that absorbs heat from house air as refrigerant evaporates. Located inside the air handler or above the furnace. Dirty coils reduce capacity and ice up — clean with coil cleaner annually.
Electric Vehicle Supply Equipment — the wall- or pedestal-mounted charger that delivers AC power to a vehicle's onboard charger. Common rated currents: 32A, 40A, 48A; pair with a matching breaker.
Physically sealing entry points — gaps around pipes, vents, eaves, and foundation cracks — to prevent rodents and insects from entering a structure. The most durable long-term pest prevention strategy.
The perceived loudness of a bath or range exhaust fan. Quiet fans rate under 1.0 sone; very quiet under 0.3 sone. Quiet fans get used more often, which improves indoor air quality.
A connection for PEX-A only that expands the tubing over a fitting; the tubing's shape memory then shrinks tight. Wins for high flow rates and freeze tolerance over crimp/clamp methods.
A flexible joint between concrete and other surfaces (foundation, sidewalks, columns) that allows independent movement. Prevents stress cracking from differential expansion.
A small pressurized tank added to a closed-loop hot water system to absorb pressure increases when water is heated. Required by code in many areas when a pressure-reducing valve is present on the water main.
A metering device in an HVAC refrigerant circuit that lowers refrigerant pressure before it enters the evaporator, causing it to cool and evaporate. TXVs (thermostatic expansion valves) modulate for efficiency.
A door installed in an exterior wall that must seal against weather, provide security, and resist forced entry. Steel and fiberglass doors offer superior insulation and security compared to solid wood. Available pre-hung with frame.
Insulating value of an entry door — typically R-5 to R-7 for fiberglass and steel; wood doors are R-2 to R-3 unless built with insulating cores.
Wood, PVC, or composite boards that frame and finish exterior windows, doors, corners, and rooflines. Cellular PVC trim never rots, holds paint well, and costs 10–20% more than wood equivalents.
Excavating around the foundation to apply waterproof membrane, drainage board, and perforated pipe at the footing level — the most thorough solution for wet basements, stopping water before it enters the wall.
A ceiling box certified to support a 35–70 lb ceiling fan. Required for any ceiling fan installation; identified by the rating embossed inside the box.
An apron-front sink with a large, deep basin and exposed front face extending past the cabinet. Available in fireclay (most durable), cast iron, stainless, and composite. Requires modified cabinet and countertop cutout.
The horizontal board running along the lower edge of the roof, to which gutters are attached. Fascia is a common source of rot — inspect annually. PVC and aluminum fascia are rot-proof alternatives.
The horizontal board at the edge of a roof eave where gutters mount. Wood fascia rots when gutters overflow; aluminum and PVC alternatives are now standard for new construction.
Gallons per minute flow rate. WaterSense bath faucets cap at 1.5 GPM; kitchen faucets at 1.8 GPM. Kitchen faucets sold for commercial use can exceed 2.2 GPM.
Decorative painting techniques — sponging, ragging, color washing, Venetian plaster — that create textured visual effects. Less common in 2026 minimalist trends but still in luxury work.
A defective electrical panel brand from 1950s–80s with breakers that fail to trip during fault conditions. Replacement is strongly recommended due to documented fire hazards even on standard inspections.
Investment Tax Credit — 30% of solar system cost as federal income tax credit through 2032. Includes panels, labor, batteries, and qualifying components.
The 25C tax credit offers 30% back (up to $3,200/year) on qualified energy improvements: heat pumps ($2,000 cap), insulation, windows and doors ($600 cap each), and electrical upgrades ($600 cap). Verified with IRS Form 5695.
The traditional asphalt-saturated felt paper installed between roof sheathing and shingles. #15 felt weighs 15 lbs per 100 sq ft; #30 felt is heavier and more durable. Largely replaced by synthetic underlayments in new construction.
Plant nutrition products labeled with three numbers representing percentages of Nitrogen (N), Phosphorus (P), and Potassium (K). A 28-0-6 lawn fertilizer has 28% nitrogen, no phosphorus, and 6% potassium. Match fertilizer to soil test results.
A cool-season grass type — turf-type tall fescue is the dominant transition-zone lawn. Drought-tolerant and shade-tolerant; deep-rooted.
A mortgage insured by the Federal Housing Administration — allows down payments as low as 3.5% and more flexible credit requirements than conventional loans. FHA appraisals include a property condition check.
Siding made from Portland cement, cellulose fiber, and sand — sold under brand names including James Hardie, Nichiha, and Allura. Rated Class A fire resistant, warranted for 30+ years, and resists pests, rot, and moisture.
Concrete with synthetic, glass, or steel fibers mixed in. Reduces shrinkage cracks; allows slabs without welded wire in some applications. Doesn't replace structural rebar.
Pre-cut fiberglass mats fitted between studs and joists. Most common insulation type; R-13 for 2×4 walls, R-19 for 2×6 walls, R-30 for ceilings. Performance depends on installation quality.
A door with foam-filled fiberglass skins. Mimics wood appearance with no rotting; superior insulation R-5 to R-7. Therma-Tru and Pella are leading brands.
The woven glass fiber mat used as the reinforcing substrate for asphalt shingles, replacing the organic felt base used before 1970. Fiberglass mat shingles are fire-resistant and dimensionally stable.
A pre-formed fiberglass pool shell installed in an excavation. Faster install than gunite; smoother finish; limited shape options.
A window with pultruded fiberglass frames. Stronger and more dimensionally stable than vinyl; expands and contracts at the same rate as the glass — minimizing seal failure.
Standard wall or floor tiles used to cover the main area of a surface, as opposed to accent or border tiles. Field tiles make up the majority of a tile installation.
The toilet-tank valve that refills the tank after a flush. Modern Fluidmaster 400 and Korky Quietfill are the dominant brands. Replace at first sign of running or hissing — typical lifespan 5–7 years.
A solid wood or panel piece bridging gaps between cabinets and walls. Standard widths 3" or 6"; can be scribed to fit irregular wall surfaces.
A stain or sealer that forms a coating on top of the wood. Higher initial gloss but eventually peels — requiring sanding before recoating.
A 200-mesh filter at the start of every drip zone. Catches sediment that would otherwise clog emitters; clean every season.
The primary water filtration component in a pool system. Sand filters are simplest; cartridge filters need periodic cleaning; DE (diatomaceous earth) filters provide the finest filtration. Clean or backwash filters regularly.
A craftsman who installs interior trim, built-ins, crown molding, window and door casings, baseboards, and cabinetry. Finish carpentry requires precision and attention to detail; it's the final visible work in any renovation.
Horizontal wood blocking installed between wall studs at mid-height to slow the spread of fire through stud cavities. Required at each floor level and at 10-foot vertical intervals in platform-framed walls.
Regulations governing fire prevention, egress, sprinklers, smoke detection, and fire-rated construction. Enforced by the local fire marshal, separately from the building department.
A wood or gas-burning outdoor fire feature. Wood pits are simple; gas pits require gas line, code-compliant safety controls, and burner ratings.
Material used to seal gaps around pipes, ducts, and wires where they penetrate fire-rated walls or floors, preventing fire from traveling through the penetration. Intumescent products expand in heat to seal the opening.
A stiff, flexible metal or fiberglass tape used to route electrical wire through walls and conduit. Fiberglass fish tape works in live panels; steel tape conducts electricity and must not touch live wires.
A contract where the total price is set regardless of actual costs. Provides price certainty for the homeowner but requires a complete, detailed scope. Change orders are billed separately.
A non-operable window unit — no sash movement. Often used for picture-frame views, accent shapes, or paired with operable units. Fixed windows are more air-tight and water-resistant than operable types.
A simple piston that meters refrigerant into the evaporator at a fixed rate. Cheaper than a TXV but less efficient when load conditions vary. Common in older or budget air-conditioning equipment.
A standardized measure of wastewater flow rate used to size drain pipes and determine septic capacity. A toilet counts as 4 FUs; a sink as 1–2 FUs. Plumbers use total fixture unit count to size the drain stack.
Natural flat stone — limestone, sandstone, slate, or quartzite — used for walkways, patios, and pool decks. Can be dry-laid over gravel or mortar-set. Natural irregularity requires careful leveling. Costs $25–$50/sq ft installed.
A small rod that detects burner flame using a microamp signal. Carbon buildup is the most common nuisance failure in modern furnaces — clean with fine emery cloth as part of annual maintenance.
A rubber seal at the bottom of a toilet tank that lifts to release water during a flush. Failed flappers are the #1 cause of running toilets — replace every 3–5 years.
A 45° flared end on copper refrigerant tubing that seals against a nut and adapter. Standard on mini-splits but requires precise tooling — over-torqued or under-torqued flares are a common leak source.
A 45° flared copper-tube connection sealed by a nut and brass body. Used on gas appliances (water heaters, dryers) where compression fittings are not approved by code.
A solar racking foot with integrated flashing slipped under shingles. Permanent leak-proof installation; the modern standard.
Thin metal or membrane material installed at joints, intersections, and transitions on a roof, wall, or foundation to prevent water infiltration. Includes step flashing, counter flashing, base flashing, valley flashing, and drip edge.
A system of step flashing along the sides of a chimney and counter flashing sealed into the mortar joints that prevents water from entering the chimney-roof junction. A leading source of roof leaks in homes over 15 years old.
A non-reflective paint finish that hides wall imperfections best. Traditional choice for ceilings; not scrub-able — touch-ups blend invisibly. Modern 'matte washable' lines are scrub-rated flats.
A roof with slope less than 2/12 — technically low-slope, not flat. Requires single-ply, BUR, or modified bitumen membrane systems rather than shingles.
A paint sheen that reflects no light — hides surface imperfections best of all sheens. Least washable. Used on ceilings and low-traffic areas. Washable flat paints (like Benjamin Moore Aura Matte) retain a flat look while being cleanable.
A flexible, insulated spiral duct used for short branch runs to air registers. More economical than sheet metal but creates more airflow resistance when kinked or compressed. Should be used in short, straight runs with minimal bends.
A water-level safety switch in a condensate pan or pump that shuts down the AC when condensate isn't draining properly. Required by code in most jurisdictions in horizontal attic and second-story air handlers.
A valve in a toilet tank or other water vessel controlled by a float that shuts off the water supply when the liquid reaches a set level. A running toilet is usually caused by a worn float valve or flapper.
A floor not fastened to the subfloor — held in place by perimeter trim and gravity. Common for laminate, LVP, and engineered hardwood floating installs.
A drain set in a floor — most common in basements, mechanical rooms, garages, and laundry rooms. Maintain trap seal with periodic water or a trap primer.
An engineered floor framing member using webs of small dimensional lumber. Open webs allow ducts and plumbing to run within the truss depth.
A low-wall or floor-standing mini-split indoor head. Ideal for retrofits where wall space is limited or where homeowners want warm air at floor level for cold-climate heating.
The volume of water per unit time measured in gallons per minute (gpm) or gallons per hour (gph). Showers use 1.5–2.5 gpm; dishwashers 3–4 gpm. Inadequate flow rate from a tankless water heater is a common install complaint.
An aluminum, stainless, or clay liner inside a chimney that safely conducts combustion gases out of the home. Required when relining for high-efficiency appliances or when the original masonry liner is damaged.
The brass or plastic outlet at the bottom of a toilet tank. The flapper or canister flush mechanism seats against it. Replacement requires removing the tank from the bowl.
A coal-combustion byproduct used to partially replace cement. Improves workability and long-term strength while reducing concrete's carbon footprint by 15–30%.
Rigid insulation panels — expanded polystyrene (EPS), extruded polystyrene (XPS), or polyisocyanurate — providing R-3.8 to R-6.5 per inch. Used for exterior continuous insulation, below-slab, and basement walls.
UL 181-rated metallic tape for duct sealing. Apply to clean, dry surfaces. Note: cloth duct tape is NOT code-compliant for ducts despite the name.
A measure of light intensity at a surface. Recommended levels: 30 fc for kitchen counters, 50 fc for desk work, 5 fc for hallways. Used to design layered lighting plans.
The widened base of a foundation that distributes building loads to the soil. Sized by structural engineer; minimum width and depth set by code.
A perforated pipe surrounding a foundation footing in gravel, with a filter fabric to keep silt out. Primary defense against hydrostatic pressure and basement water intrusion.
Perforated pipe in gravel around the perimeter of footings. Discharges to daylight, sump pit, or storm drain; the foundation's primary defense against hydrostatic water pressure.
A central HVAC system that heats or cools air in a furnace or air handler and distributes it through a duct system. The most common system in U.S. homes — allows adding filtration, humidity control, and zoning.
Tiny pinhole leaks in copper refrigerant coils caused by reactions with VOCs in indoor air. Common in homes with new construction off-gassing. Manifests 5–10 years after equipment install.
The structural base of a building that transfers loads into the soil. Types include slab-on-grade, crawl space with stem wall, full basement, and pier-and-beam. Foundation type affects future renovation and waterproofing options.
Two-part epoxy or polyurethane injected into foundation cracks under low pressure. Permanent waterproof seal; warranties typically 5–10 years.
Reinforcing or extending an existing foundation through concrete pours, helical piers, or push piers. Required when settlement, cracking, or addition loads exceed original capacity.
The process of applying coatings, membranes, drainage systems, and grading to prevent water from penetrating a foundation. Exterior waterproofing is more effective but costly; interior systems manage water that enters.
A switch added between two three-ways to control a light from three or more locations. Uses two travelers in and out — common in long hallways and great rooms with multiple entries.
Filter Performance Rating — a 4–10 proprietary scale used by Home Depot and select brands. FPR 7 ≈ MERV 11; FPR 10 ≈ MERV 13. Like MPR, an alternative to industry-standard MERV.
An L-shaped metal tool used to mark right angles, check square corners, and calculate rafter lengths and stair layouts. One of the most fundamental tools in framing carpentry.
A whole-home battery system supporting time-of-use management, grid services, and full backup. Competing in the post-Powerwall residential market.
A bathtub that stands independently from walls, available in clawfoot, slipper, and contemporary oval styles. Requires a floor-mounted tub filler or a longer wall-mounted spout. Creates a dramatic bathroom focal point.
The expansion and contraction of water as it freezes in concrete pores and joints, causing spalling and cracking. High-quality air-entrained concrete and proper drainage prevent freeze-thaw damage in cold climates.
A pair of doors with glass panels extending for most of their length, hinged at opposite sides of the frame and meeting in the center. Available as exterior patio doors and interior room dividers.
A perforated pipe in a gravel-filled trench that intercepts groundwater and carries it to a discharge point. Manages wet basements, soggy yards, and foundation moisture.
A pair of casement windows that meet in the center and open outward like French doors. Provides maximum ventilation and an architectural focal point. Most common in Mediterranean and Colonial Revival architecture.
A duct or pipe that brings outside air into the HVAC system or directly into the living space to dilute indoor pollutants. Required in tight homes with limited natural infiltration — tied to bathroom exhaust timing in some designs.
Trim where the soffit meets the wall, just below the eave. Decorative crown molding can mount above the frieze for a more classical exterior look.
Highly twisted cut-pile carpet with a casual, textured appearance. Hides footprints and vacuum marks better than smooth Saxony; durable for active homes.
Common front door materials: solid wood (premium, requires maintenance), fiberglass (durable, dent-resistant), steel (security, dent-prone), composite (mid-tier balance).
The depth to which the ground freezes in a given geographic location. Footings must extend below the frost line to prevent movement. Ranges from 0" in Florida to 60"+ in northern Minnesota.
A foundation stem wall extending below frost depth. Required in cold climates to prevent frost heaving — typically 36–60 inches below grade.
An exterior faucet with a 6–14 inch stem that shuts water off inside the heated envelope. Disconnect the hose in winter to prevent water from freezing in the stem.
A slab foundation insulated to prevent frost penetration without deep footings. Allowed by code as alternative to traditional 4-foot frost depth in cold climates.
Water pipes can freeze and burst when temperatures fall below 20°F and insulation is inadequate. At-risk pipes: exterior walls, crawl spaces, attics, and garages. Let faucets drip in extreme cold; insulate vulnerable pipes.
Removing the entire window — frame, sill, trim — and installing a new unit. Allows reframing, flashing replacement, and proper waterproofing; needed when frames are rotted.
A cabinet door covering most of the face frame, leaving only a thin reveal between doors. Modern look; standard on frameless cabinets.
Enclosing a structure in a tent and filling it with a gas fumigant (typically Vikane/sulfuryl fluoride) to eliminate wood-boring pests including drywood termites, bed bugs, and wood borers. Requires 2–3 days out of the home.
A forced-air heating appliance that burns gas, oil, or electricity to heat air distributed through ducts. Modern condensing furnaces achieve 95–98% AFUE. Requires annual inspection and filter replacement every 1–3 months.
A thin strip of wood or metal attached to a wall or ceiling to create a level surface for attaching drywall or paneling, or to create an air gap between masonry and finished wall surfaces.
A disconnect with replaceable fuses providing both shut-off and overcurrent protection. Required when feeder ampacity exceeds equipment requirements.
A roof style with two sloped sides forming a triangular gable wall on each end. Simpler to frame and ventilate than hip roofs but less wind-resistant.
A triangular or louvered vent in a gable end wall that exhausts attic air. Less effective than ridge vents on long roofs; can short-circuit airflow if mixed with ridge venting.
A thermostatically controlled fan installed in the gable end wall to actively exhaust hot attic air. Less effective than a properly designed ridge/soffit passive system for hot climates but can supplement passive ventilation.
GAF's top contractor certification — held by 3% of U.S. roofers. Required for the GAF Golden Pledge warranty (50-year material + workmanship).
An aluminum-zinc alloy coating on steel roofing panels. Outlasts traditional galvanized in salt and humid environments; standard on most modern metal roofing.
Steel water pipe coated in zinc, used in pre-1960 homes. Internal corrosion restricts flow and adds lead from joint compounds. Replace any remaining galvanized supply lines for water quality and pressure.
Steel coated with zinc to resist corrosion. Used for pipe, nails, flashing, gutters, and fencing. Hot-dipped galvanized is more durable than electroplated. Galvanized water pipes corrode from the inside over 40–50 years.
A symmetrical two-sided roof with two slopes per side — common on barns and Dutch Colonials. Provides more headroom in attic space than a standard gable roof.
A small wireless sensor reporting open/closed status. Pair with smart hubs for automation rules ('close at 10 pm if still open').
An under-sink motor that grinds food waste into small particles for disposal through the plumbing drain system. HP ratings: 1/3 HP (light use), 1/2 HP (medium), 3/4–1 HP (heavy use). Continuous-feed motors are most common.
A small outdoor structure for storing tools and equipment. Permits required over certain sizes (typically 100–200 sq ft); zoning setbacks apply.
A small box-shaped window projecting outward, typically over a kitchen sink. Used to grow herbs and plants — like a mini greenhouse.
Piping that supplies natural gas or propane to appliances — furnaces, water heaters, ranges, dryers, and fireplaces. Gas lines must be installed and pressure-tested by a licensed plumber or gas fitter. Never DIY gas line work.
An electromechanical valve that controls gas flow to the burner. Single-stage gas valves are simple on/off; two-stage and modulating valves provide variable BTU output for matching load.
An older-style shut-off valve with a vertical gate that lowers into the flow. Many turns to operate; corrodes open over time. Replace with ball valves during plumbing upgrades.
An octagonal or hexagonal free-standing outdoor structure with full roof. Traditional garden focal point; modern versions in metal and composite.
A licensed professional who manages the complete construction or renovation project — coordinating subcontractors, materials, permits, scheduling, and inspections. The GC is your single point of accountability.
Coverage that protects contractors — and their clients — from third-party claims for property damage or bodily injury during a project. Always verify contractor has current GL coverage before work begins.
A weatherproof exterior outlet (L14-30 or L14-50) that allows a portable generator to feed the panel through an interlock or transfer switch. Cleaner than running cords through a window.
A mechanical device that prevents the main breaker and a backfeed breaker from being on simultaneously. Allows safe portable-generator connection to a panel without a manual transfer switch.
A permanently installed natural gas or propane generator that automatically starts during a power outage. Connected via an automatic transfer switch. Sized in kilowatts — 22kW is typically sufficient for whole-home backup.
A polypropylene grid embedded in soil behind a retaining wall to add strength. Required for tall walls and high-load applications.
A highly efficient HVAC system that exchanges heat with the earth rather than outdoor air, using buried loops or wells. Qualifies for the 30% federal tax credit and provides heating efficiency of 300–500%. High upfront cost.
A breaker with built-in ground-fault protection that protects an entire branch circuit. Allows downstream use of standard receptacles. More expensive than receptacle-style GFCI but covers more outlets.
Ground Fault Circuit Interrupter — a safety outlet that trips in milliseconds when a ground fault is detected. Required by code within 6 feet of water sources: bathrooms, kitchens, laundry, garages, pools, and outdoors.
Ground Fault Circuit Interrupter — detects current leakage and trips in milliseconds. Required at all bathroom, kitchen counter, garage, basement, outdoor, and pool/spa receptacles.
An acoustic sensor detecting the sound frequency of breaking glass. Pairs with door/window contacts for comprehensive perimeter security.
Translucent or colored glass tiles used for backsplashes, shower walls, and pool surrounds. The light-transmitting quality adds luminosity. Requires white non-sanded grout and a tile-adhesive mortar — standard gray mortar shows through.
Tile with a fired glass surface coating. Most decorative tile is glazed; the glaze determines stain and abrasion resistance — verify PEI rating before purchasing for floors.
The glass in windows and doors. Double-pane glazing (two glass layers with an inert gas fill) is standard. Triple-pane is recommended in cold climates. Low-E (low-emissivity) coatings reduce solar heat gain and UV transmission.
A putty-like material used to seal glass in older wood window frames. Modern alternatives include silicone caulk and pre-formed EPDM glazing tape. Old glazing compound that cracks and falls out allows water infiltration.
The highest-sheen paint level, reflecting the most light. Most durable and washable. Used on trim, doors, and cabinetry. Shows surface imperfections clearly — requires excellent prep work for a quality result.
Flooring adhered to the subfloor with mastic or pressure-sensitive adhesive. Required over existing tile, on staircase landings, or in commercial applications with rolling loads.
Glued-laminated timber — large engineered beams from layered dimensional lumber. Common for vaulted ceiling beams and exposed structural elements.
Propylene or ethylene glycol mixed with water in hydronic systems exposed to freezing — snow-melt, outdoor reset, garage zones. Test annually with a refractometer; replace every 5–10 years.
Google's smart-home ecosystem with Nest devices and broad third-party support. Strong voice assistant integration via Google Assistant.
The slope of the land around a building. Positive grade slopes away from the foundation to drain water — 6" of fall in the first 10 feet is typically required by code. Negative grade directs water toward the foundation.
A continuous reinforced concrete beam at grade level that ties together isolated footings and distributes building loads. Used in areas with expansive soils where spread footings would be compromised by soil movement.
A construction element or system that was legal when installed but doesn't meet current code — permitted to remain because it predates the current standard. Grandfathered conditions must be brought to code when renovations disturb them.
A natural stone countertop with unique veining and color variations. Heat-resistant; requires periodic sealing to prevent staining. Cost similar to quartz.
Granite slabs are templated, cut, and installed by stone fabricators — not countertop installers. Typical process: measure, template (cardboard or digital), fabricate at shop (2–3 weeks), deliver and install in 1–2 hours. Weight: 18–20 lbs/sq ft.
Erosion of mineral granules from aging shingles, exposing asphalt to UV. Heavy granule shedding indicates a roof in the last 25% of its life.
Wastewater from sinks, showers, and laundry (not toilets). Can be recycled for irrigation in states with gray water reuse laws. Gray water systems cost $500–$2,000 installed and reduce outdoor water use 30–50%.
The process of clearing an algae-infested pool using shock treatment (10× normal chlorine dose), algaecide, brushing, and multiple filter cycles. Severe cases may require draining, acid washing, and refilling.
A moisture-resistant drywall panel with a green paper facing — intended for high-humidity areas but not wet areas. Largely replaced by cement backer board in wet applications; still used in humid areas like laundry rooms.
Older water-resistant drywall (purple or green facer) for wet areas. Replaced by paperless and cement backer in most modern bathroom installs.
A third-party certification for low-emission building materials. GreenGuard Gold paints are tested for ultra-low chemical emissions in schools and healthcare environments.
A solar system connected to the utility grid — excess power flows back to the grid for credit (net metering). The most common residential solar configuration. Cannot power the home during grid outages without battery backup.
Decorative dividers sealed inside the IGU. Visually divide a single pane into smaller lights; easier to clean than removable grilles.
A large rotating disc machine used to grind, polish, or scarify concrete floors — preparing them for coatings, removing high spots, or exposing aggregate for decorative concrete. Available in single-disc and planetary models.
A sewage pump with a cutter blade that shreds solids into slurry. Used in low-pressure sewer systems and remote properties where gravity sewer isn't possible.
Low-growing plants used to cover bare soil, prevent erosion, and suppress weeds under trees and in shady areas where grass won't thrive. Pachysandra, liriope, vinca, and creeping phlox are popular choices.
A 5/8" copper-clad steel rod 8' long driven into the earth and bonded to the service grounding electrode conductor. Two are usually required for residential services.
An electrical safety system that provides a fault-current path to earth, protecting people from shock and equipment from damage. Modern wiring includes a green or bare copper ground conductor. Older 2-prong outlets lack this protection.
The bare or green-insulated conductor running from the service neutral to the grounding electrode system. Sized per NEC table 250.66 based on service size.
The combination of grounding rods, ufer ground, water-pipe ground, and/or building steel that grounds the electrical service. Code requires at least two electrodes bonded together.
A cementitious or epoxy material used to fill the joints between tiles. Sanded grout is used for joints wider than 1/8"; unsanded for narrower joints. Epoxy grout is stain-proof but difficult to work with.
Cement grout containing fine sand for joints 1/8" or wider. Standard floor grout — color varies by brand; epoxy-grout alternatives offer stain resistance at higher cost.
Cement grout without sand for joints under 1/8" — typical for marble and glass tile. Sand would scratch the tile face during installation.
The color of grout joints significantly affects the overall appearance of tile installations. Dark grout hides dirt but creates a busy pattern; light grout makes the tile stand out but shows staining. Epoxy grout is stain-proof.
A pigmented topical coating that recolors faded grout. Cheaper alternative to regrouting; reapply every 5–10 years.
Cracking or crumbling grout in tile installations is caused by substrate movement, improper mortar coverage, missing expansion joints, or using grout in structural movement joints. Regrout after addressing the underlying cause.
A rubber-faced tool used to spread grout into tile joints. Held at a 45° angle to pack grout into joints without dragging it out. Clean the float frequently to keep grout off tile surfaces.
A penetrating silicone sealer applied to cement grout joints to prevent staining and water absorption. Reapply every 1–2 years on floors and 3–5 years on walls.
Pouring or pumping a mortar mixture into the hollow cavities of concrete block walls and around reinforcing bars for added strength. Filled and grouted CMU walls are significantly stronger than hollow-core walls.
A protective barrier on elevated surfaces — decks, balconies, landings, and stairs — to prevent falls. Building codes require guardrails on surfaces 30" or more above grade. Minimum height: 36" in residential, 42" in commercial.
A pneumatically-applied concrete pool. Most durable in-ground pool type; allows free-form designs. Premium pricing vs. fiberglass.
A channel mounted at the eave of a roof that collects rainwater and directs it to downspouts. Seamless aluminum gutters in 5" K-style are most common. Clean twice yearly; install guards to reduce frequency.
A roof-edge flashing (sometimes called drip edge into gutter) that ensures water flows from the shingle edge into the gutter rather than behind it.
Removing leaf and debris accumulation from gutters and flushing downspouts — recommended twice annually (spring and fall). Clogged gutters cause overflow, ice dams, foundation wetting, and fascia rot.
A leaf-blocking screen, mesh, foam, or surface-tension cover for gutters. Premium micro-mesh systems perform best; foam inserts deteriorate within 3–5 years.
A bracket securing the gutter to the fascia. Hidden hangers screw into fascia from inside the gutter; spike-and-ferrule hangers are less reliable in modern installs.
The slope of gutters toward downspouts — typically 1/4" per 10 feet. Insufficient pitch causes standing water, mosquito breeding, and overflow during heavy rain.
A standardized measure of how much heat a refrigerant traps relative to CO₂ over 100 years. R-410A has a GWP of 2,088 while R-454B is 466 — driving the AIM Act phasedown of high-GWP refrigerants.
Generic term for drywall — a panel consisting of a gypsum plaster core encased in two layers of paper. Versatile, inexpensive, and fire-resistant. Standard size is 4' × 8'; 4' × 12' sheets reduce seams and finishing labor.
Bruises, cracked granules, or fractured shingles caused by hail. Insurance adjusters use chalk circles and core sampling to verify hail damage during claim assessments.
Impact damage to asphalt shingles — appearing as round indentations without granules, bruising, and exposed fiberglass mat. Class 4 impact-resistant shingles resist hail up to 2" diameter and qualify for insurance premium discounts.
A bathroom containing only a toilet and sink — no tub or shower. Also called a powder room. Adding a half bath to a home increases value by 10–15% more than the cost of construction in most markets.
An outlet where one socket is switched and the other is always live. Common in living rooms for lamp control via a wall switch. The break-off tab between hot terminals is removed.
A traditional U-profile gutter common on historic and modern luxury homes. Copper and zinc options last 50+ years; aluminum half-round retrofits available.
A manual cutting tool with an adjustable iron blade for smoothing wood surfaces, fitting doors and drawers, and cleaning up rough sawn lumber. Modern hand planes are precision instruments used by finish carpenters and woodworkers.
A handheld spray on a flexible hose, mounted on a bar or wall hook. Useful for accessibility, cleaning, and bathing pets. Required on at least one fixture for ADA-accessible baths.
Shingles individually dabbed with roofing cement on edges and tabs. Required at hips, ridges, and rake edges in high-wind zones to prevent uplift.
A rail held for support alongside a stairway or ramp. Code requires a graspable handrail on all stairways with 4 or more risers. Graspable means the hand can fully wrap around the rail — flat rails are not code-compliant.
A compressed wood fiber siding product (Masonite) susceptible to moisture damage and rot, especially at cut edges and where caulking fails. Prevalent in 1980s–1990s construction — subject to class-action settlements for moisture problems.
James Hardie's fiber cement tile backer. The dominant tile backer in U.S. residential — easy to score-and-snap; install with thinset and corrosion-resistant screws.
The flagship lap siding product from James Hardie Building Products, made from fiber cement. Class A fire rated, warranted 30 years, available in ColorPlus factory-painted finish. The most popular siding brand in the U.S.
Measured by the Janka hardness test — the force needed to embed a steel ball into the wood surface. Hickory (1820 Janka) and white oak (1360 Janka) are common hardwood floors. Bamboo (strand-woven) rates 1380+.
Non-living elements of a landscape — patios, walkways, retaining walls, pergolas, water features. Often the largest portion of landscape budgets.
Pavers with extra-wide joints filled with gravel, allowing rainwater to infiltrate the soil. Required in some jurisdictions for impervious surface limits.
Non-living elements of a landscape — patios, walkways, walls, driveways, edging, and outdoor kitchens — as opposed to softscaping (plants and lawns). Hardscaping adds defined structure and reduces maintenance needs.
A blend of natural oils and waxes (Rubio Monocoat, Osmo) applied as a thin penetrating finish. Matte appearance; spot repairable; lower VOC than urethanes.
A permanently wired EV charging station, as opposed to plug-in. Allowed at higher continuous currents (48A, 80A) than plug-in installations and avoids receptacle wear.
The tree species from which solid hardwood flooring is milled — oak, maple, hickory, walnut, cherry, and Brazilian cherry are common. Species affects color, grain pattern, Janka hardness, and price.
A horizontal beam over a window, door, or opening that transfers loads from above to the studs on either side. Sized by span and load — engineered LVL is common for openings over 6 feet.
A code table specifying maximum header spans for given lumber sizes and load conditions. Used by framers and inspectors to verify header sizing without engineering.
An adjustable resistor in older mercury thermostats that fine-tuned cycling. Replaced by digital cycle-rate settings in modern thermostats. Set incorrectly, it caused short cycling or poor temperature control.
A component in a furnace that transfers heat from combustion gases to the air stream without mixing them. A cracked heat exchanger allows deadly carbon monoxide to enter the living space — requires immediate replacement.
The metal vessel that separates combustion gases from breathing air while transferring heat. A cracked heat exchanger can leak CO indoors — replace the furnace, never patch a cracked exchanger.
An HVAC system that moves heat rather than generating it — extracting heat from outdoor air in winter and reversing in summer for cooling. Cold-climate heat pumps work effectively to -15°F. Eligible for 30% federal tax credit.
A snow hood or wind baffle installed over an outdoor heat-pump unit in heavy-snow areas. Prevents drifting snow from blocking airflow while allowing condensate to drain.
A control that disables the heat pump compressor below a defined outdoor temperature, switching to backup heat. Prevents inefficient or damaging operation in extreme cold.
A highly efficient pool heating system that extracts heat from the air, achieving 500% efficiency (COP of 5). More expensive upfront than gas heaters but cost-effective for pools used frequently. Loses efficiency below 50°F air temperature.
A composite or steel stand that elevates an outdoor heat-pump unit above grade. Recommended in snow regions to keep the coil clear of drifts and condensate ice; typical cost $80–$200.
An electric water heater with a built-in heat pump that pulls heat from surrounding air. 3–4× more efficient than electric resistance models. Eligible for federal IRA tax credits up to $2,000.
A ventilation unit that exchanges stale indoor air for fresh outdoor air while recovering 70–85% of the heat energy from the outgoing air stream. Ideal for cold climates where conserving heat is the priority.
Electric resistance coils in an air handler that provide auxiliary or backup heat during cold weather or defrost. Sized in 5–25 kW increments; high amp draw and high operating cost.
Self-regulating heat cable installed inside gutters and downspouts to keep drainage paths open during freeze-thaw cycles. Common in northern climates with chronic ice dams.
A steel screw pile installed beneath an existing foundation to stabilize settlement. Faster, cleaner, and lower-impact than concrete underpinning; cost $1,500–$3,500 per pier.
High-Efficiency Particulate Air filter capturing 99.97% of particles 0.3 microns and larger. Too restrictive for most residential HVAC blowers — typically used in standalone air purifiers or bypass systems.
A 45° or 90° interlocking rectangular tile or wood pattern. Adds visual interest in entryways, kitchens, and accent walls; requires extra labor and waste over straight installation.
Hexagonal porcelain or marble floor tile. Iconic in vintage bathrooms; current revival uses larger 4–8" hex sizes in matte porcelain for kitchens and entryways.
Next-generation spray foam using hydrofluoroolefin blowing agents with very low GWP. Required in many states under refrigerant phasedowns; nearly identical performance to legacy formulas.
A paint's ability to cover the underlying surface in fewer coats. Premium paints achieve full hide in 1 coat; budget paints often need 2–3.
A mirror-like reflective finish for doors, cabinets, and accent trim. Maximum durability and wash-ability but maximum visibility of all surface defects.
Bent shingles or specialty pieces that cap hips and ridges for a finished, watertight seal. Always use matching manufacturer caps for warranty compliance.
Specially folded shingles installed at hip and ridge lines of a roof for a finished appearance and additional weather protection at the highest stress points. Available in standard and high-definition profiles.
A roof style where all sides slope down toward the walls, with no gable ends. More wind-resistant than gable roofs; common in coastal and tornado-prone areas.
Monthly or annual dues paid to a homeowners association to fund shared maintenance, amenities, and reserves. Review the HOA's reserve fund balance and history of special assessments before buying.
A heavy steel anchor connecting wall framing to the foundation to resist seismic and wind uplift. Required in shear-wall designs in seismic zones.
A missed spot or thin coverage area in a paint job. Inspect with raking light at low angle; common on cabinet sides, ceiling-wall junctions, and behind toilet tanks.
An interior door with a corrugated cardboard core between two thin face panels. Cheapest interior door option — light, less soundproof, prone to door-knob holes.
An open-source smart-home platform running on Raspberry Pi, NUC, or commercial hardware. Maximum flexibility and privacy; technical setup vs. proprietary hubs.
The integration of smart devices — lights, thermostats, locks, appliances, and entertainment systems — controlled via a central hub, voice assistant, or smartphone app. Google Home, Amazon Alexa, and Apple HomeKit are major platforms.
A professional assessment of a home's energy use, identifying inefficiencies and prioritizing improvements. A BPI-certified auditor uses a blower door test, duct pressure test, and thermal imaging. Often subsidized by utility companies.
A DOE program providing a 1–10 score for home energy efficiency. A score of 5 is median; higher is better. Generated from an on-site audit. Increasingly required in some real estate markets.
The portion of your home's value that you own outright — market value minus outstanding mortgage balance. Equity can be accessed through a HELOC or cash-out refinance for home improvements.
A revolving credit line secured by home equity, with a draw period (5–10 years) and repayment period. Interest rates are variable. Popular for financing renovations because interest may be tax-deductible if used for home improvements.
A fixed-rate, lump-sum loan secured by home equity — a second mortgage. Better than a HELOC for large, defined projects because the fixed rate provides predictable payments.
A non-invasive visual examination of a property's major systems and components by a licensed home inspector — structure, roofing, electrical, plumbing, HVAC, insulation, and ventilation. Standard before closing on a home purchase.
The regular upkeep tasks that preserve a home's condition and prevent minor issues from becoming major repairs. Annual maintenance costs average 1–2% of home value. Deferred maintenance compounds into expensive repairs.
A dedicated workspace in a residential setting — converted bedroom, basement, or purpose-built addition. Design essentials: ergonomic height desk, good lighting (natural + task), sound insulation, and adequate electrical circuits.
A policy covering damage to a home from fire, storm, theft, and liability. Most policies exclude floods and earthquakes. Required by lenders. Review coverage limits annually — rebuilding costs rise with inflation.
Natural stone with a matte, smooth-but-not-shiny finish. Less slippery than polished and shows fewer scratches; popular for marble and limestone floors.
A bottom-hinged window opening inward. Common in basements; increasingly used in modern wet rooms and laundry spaces.
An exterior wall faucet for garden hoses. Frost-free hose bibbs have a long stem that places the shut-off inside the heated wall to prevent freeze damage.
Slang for setting compound — drywall mud that cures by chemical reaction (gets warm). Allows multiple coats in one day vs. ready-mix mud.
Builder slang for an unvented attic with foam against the roof deck. The duct system and HVAC equipment are inside the building envelope, improving efficiency.
A silicon nitride or carbide element in modern furnaces that glows red-hot to ignite the gas burner. Fragile — touching the surface with bare fingers can cause early failure. Replaces standing pilot lights.
A small heated water tub for relaxation. Standalone units typically 220V; built-in spas pair with pools through shared equipment.
An insulated foam cover protecting hot tub from debris and reducing heat loss. Replace every 5–7 years; locks recommended for child safety.
A pump that continuously circulates hot water through a loop from the water heater to fixtures, providing near-instant hot water at every tap and eliminating water waste while waiting. Smart units run only when needed.
The current-carrying conductor in an electrical circuit, typically colored black (or red for the second hot in a 240V circuit). Contact with a hot wire can be fatal — de-energize all circuits before working on electrical systems.
A wiring fault where the hot and neutral wires are swapped at a receptacle. Lights and appliances usually still work but become a shock hazard. Identified with a $10 outlet tester.
Cleaning exterior siding and surfaces using low-pressure soft washing or higher-pressure power washing. Removes dirt, mildew, algae, and oxidation. Soft washing is safer for painted wood and fiber cement than high pressure.
A permeable membrane wrapped around the building exterior over sheathing before siding installation — Tyvek and Zip System are common brands. Allows moisture vapor to escape from the wall while blocking liquid water infiltration.
A weather-resistive barrier (Tyvek, Typar) installed under siding. Sheds bulk water while allowing vapor diffusion. Properly lapped over flashing and around windows to prevent leaks.
A ventilation device that exchanges only heat (not moisture) between exhaust and supply airstreams. Best in cold, dry climates where you want to retain heat without raising indoor humidity in winter.
Heating Seasonal Performance Factor — measures heat pump heating efficiency. Higher is better. HSPF2 is the updated testing standard. Minimum for new heat pumps is HSPF2 7.5; cold-climate models achieve 10+.
Philips Hue's hub connecting Zigbee bulbs to WiFi. Required for Apple HomeKit and most third-party integrations; new Hue products work with Matter without bridge.
A bath-fan switch that turns the fan on automatically when humidity exceeds a setpoint (typically 60% RH). Eliminates user error and prevents mold growth around bath surrounds.
The ability of an HVAC system to maintain indoor relative humidity (RH) in the 35–50% range. Whole-home humidifiers add moisture in winter; dehumidifiers or variable-speed systems remove excess moisture in summer.
A laminated-glass window rated for high-wind impact (Miami-Dade or Florida Building Code). Replaces shutters in coastal areas; required in Florida coastal high-velocity hurricane zones.
Storm protection for windows — accordion, roll-down, Bahama, panel, or fabric. Required by code in coastal Florida and Gulf Coast areas; insurance discounts of 15–35% common.
A metal connector fastened between roof rafters and wall top plates to resist wind uplift. Required by code in high-wind zones (Florida, Gulf Coast, Atlantic coast). Retrofitting existing homes can qualify for insurance discounts.
A metal connector that secures rafters or trusses to top plates against uplift. Required by code in coastal hurricane zones; offers insurance discounts in many states.
The integrated system controlling a home's temperature, humidity, and air quality. Includes the furnace or heat pump, air conditioner, ductwork, thermostat, and air handler. Typically the most expensive system to replace.
A diagnostic tool used by HVAC technicians to measure refrigerant pressure on both the high and low sides of a system, diagnosing charge level, leaks, and compressor performance.
If the AC runs but doesn't cool: check the air filter (dirty filters reduce airflow), check for a frozen evaporator coil, verify the thermostat setting, and check that both indoor and outdoor units are running. Call for refrigerant issues.
If the furnace doesn't fire: check the thermostat setting, verify the filter isn't clogged, confirm the gas supply is on, and check for error codes on the furnace control board. A dirty flame sensor is a common no-heat cause.
High Volume Low Pressure paint sprayer. Lower overspray than airless; preferred for cabinets, fine furniture, and detailed finishes. Pricier and slower than airless.
A water-based paint with alkyd-like leveling and hardness. Common for trim and cabinet repaints — Benjamin Moore Advance, Sherwin-Williams Emerald Urethane Trim Enamel.
A heat pump water heater that can operate in resistance-only or high-demand modes. The standard 'electric' water heater type from 2024 onward in many state efficiency codes.
A high-pressure water jetter (1,500–4,000 PSI) used to scour drain interiors. More effective than mechanical augers for grease, scale, and root fragments.
A high-pressure water drain-cleaning method using a specialized nozzle that blasts 4,000+ psi water through the pipe, fully scouring grease, scale, and debris from pipe walls. More effective than mechanical snaking for recurring clogs.
A heating system that distributes hot water through radiators, baseboard, or in-floor tubing. Boilers, electric, or heat pumps can be the heat source. Quieter and more comfortable than forced air.
Spraying a slurry of seed, mulch, water, and fertilizer onto prepared soil. Cheaper than sod; requires consistent watering for 6–8 weeks during germination.
The upward pressure exerted by water in the ground against a foundation wall or floor slab. High hydrostatic pressure is the leading cause of basement water infiltration. Addressed by drainage systems and waterproof coatings.
Grouping plants with similar water needs on the same irrigation zone. Reduces over-watering of drought-tolerant plants and under-watering of thirsty plants.
Steel I-beams installed against bowed foundation walls. Most invasive but most robust foundation reinforcement option; typical cost $400–$700 per beam.
An engineered floor joist with OSB web and dimensional lumber flanges. Lighter, straighter, and longer-spanning than dimensional joists. Brand names: TJI, BCI.
An engineered floor joist with an oriented strand board web between two LVL flanges — providing long spans with less depth than solid lumber. Require solid blocking at supports and cannot be notched or bored like dimensional lumber.
The model code governing commercial and multi-family construction in the U.S. Adopted by most jurisdictions, often with local amendments. Residential construction falls under the IRC (International Residential Code).
An insulation-contact-rated recessed light that can be buried in attic insulation without overheating. Required when installing recessed cans below insulated attics.
The organization that develops the model building codes adopted by most U.S. jurisdictions — including the IBC, IRC, NEC (co-published with NFPA), IMC, IPC, IECC, and IPMC.
A self-adhered rubberized membrane installed at eaves, valleys, and penetrations. Seals around fasteners and prevents leaks from ice dams and wind-driven rain.
A ridge of ice forming at a roof eave when melting snow refreezes on the colder overhang. Causes water to back up under shingles. Prevented by attic insulation, ventilation, and ice-and-water shield.
A self-regulating heat cable installed in a zigzag pattern at eaves and gutters to prevent ice dams. A workaround for poorly insulated/ventilated attics; addresses symptom, not root cause.
The sealed double or triple-pane glass unit. IGU seal failure causes fog between panes; replacement of just the IGU is often cheaper than a full window.
A failed seal allowing moisture between window panes. Visible as permanent fogging or mineral deposits; replace the IGU only — frame is fine.
The model code governing mechanical systems — HVAC, exhaust fans, and fuel-burning equipment — adopted by most U.S. jurisdictions. Specifies minimum ventilation, duct sizing, and clearance requirements.
A rotary power tool that delivers high torque through rapid rotational impacts — ideal for driving long screws, lag bolts, and self-tapping screws into hard materials. More powerful and faster than standard drills for fastening.
UL 2218 Class 3 or 4 rated shingles that survive hail without damage. Insurance discounts of 10–35% are common in hail-prone regions; verify your policy's eligibility.
Drain, waste, and vent pipes embedded in a concrete slab before the pour. Repairs require saw-cutting the slab. Always camera-inspect before purchasing a slab-foundation home.
Speakers mounted flush in walls with magnetic grilles. Common in primary suites, bonus rooms, and outdoor patios.
An insulated storage tank heated by a boiler's heating loop. The most efficient way to make domestic hot water with a boiler — far better than tankless coils or standalone gas/electric tanks.
A storage tank heated by an external boiler. Common in homes with hydronic heating; provides high recovery rates with no separate burner.
A small fan motor that pulls combustion gases through the heat exchanger and out the flue on 80%+ AFUE furnaces. Inducer failure is a common no-heat call — listen for grinding bearings during startup.
An electric cooking surface that heats via electromagnetic induction directly in the cookware — not the surface. Highly efficient (90% vs. 40% for gas), precise, and the cooktop stays cool to the touch. Requires compatible (magnetic) cookware.
Uncontrolled air leakage through gaps in the building envelope — around outlets, recessed lights, plumbing penetrations, and weatherstripping. Infiltration is responsible for 25–40% of heating and cooling losses in most homes.
Federal legislation enacted in 2022 providing unprecedented incentives for home energy improvements — 30% tax credits on solar, heat pumps, EVs, and weatherization, plus rebates through utility companies for low- and moderate-income households.
A diagnostic tool that uses thermal imaging to identify heat loss, moisture intrusion, missing insulation, electrical hot spots, and plumbing leaks without destructive probing. Many home energy auditors offer IR inspections.
A non-contact temperature measurement tool that reads surface temperatures via infrared radiation — used to detect hot electrical connections, missing insulation, HVAC performance, and radiant floor heat distribution.
A cabinet door fitting flush within the face frame. Premium look; requires precision installation. More expensive than overlay doors.
Paper-faced metal or composite trim creating sharp inside drywall corners. No-Coat is a popular brand for delivering crisp inside corners.
The thermal core inside a steel or fiberglass exterior door. Polyurethane foam cores achieve R-values of 15–18 per inch — making insulated steel doors with 2" cores far more thermally efficient than solid wood doors.
Flex or sheet metal duct wrapped in fiberglass insulation. Required in attics and crawl spaces by energy code — typically R-6 minimum, R-8 in cold climates.
A foam or cardboard chute at the eave that maintains an air channel between insulation and roof deck. Required to keep soffit vents working when insulation is blown to the rafter heel.
Pre-cut panels of fiberglass or mineral wool insulation designed to fit between standard 16" or 24" stud and joist spacing. R-13 is standard for 2×4 walls; R-21 for 2×6 framing.
The measure of an insulation material's resistance to heat flow. Higher R-value means better insulation. Recommendations: R-49 to R-60 attic; R-13 to R-23 walls; R-25 to R-38 floors over unconditioned space.
Vacuum-removing old, contaminated, or rodent-damaged insulation before adding new. Typical cost $1–$2 per sq ft; often required after rodent infestation cleanup.
A Certificate of Insurance — document from the contractor's insurer verifying their coverage types, amounts, and effective dates. Request a COI naming you as additional insured on larger projects.
Most homeowner policies cover sudden and accidental water damage (burst pipe, appliance failure) but NOT gradual leaks or flooding. Document damage with photos before cleanup. Contact insurer within 24–48 hours of discovery.
A pest control approach combining inspection, identification, habitat modification, exclusion, and targeted treatments — minimizing pesticide use. The standard approach for schools, hospitals, and environmentally sensitive properties.
A perforated pipe installed in a channel around the interior perimeter of a basement floor that collects seeping groundwater and directs it to a sump pit. Part of a complete interior waterproofing system.
A fire-stopping material that expands when heated to seal gaps around pipes and wires penetrating fire-rated assemblies. Code-required for all penetrations through fire walls and floor assemblies.
A device that converts DC electricity from solar panels to AC electricity for home use. String inverters are most economical; microinverters (Enphase) optimize each panel independently and provide panel-level monitoring.
A variable-speed compressor that ramps capacity up or down to match load instead of cycling on and off. Improves comfort, reduces electric demand spikes, and extends equipment life vs. single-stage compressors.
A portable generator with electronic conditioning of output power. Quieter and produces clean sine-wave power safe for sensitive electronics. More expensive than conventional generators.
An internet-connected security camera that streams high-definition video over Wi-Fi or Ethernet to a network video recorder (NVR) or cloud storage. Superior resolution and remote access compared to older analog CCTV cameras.
A dense tropical hardwood (Brazilian walnut) known for its exceptional hardness, insect resistance, and 40–75 year outdoor lifespan. Pre-drilling required for all fasteners. Requires UV oil treatment for color maintenance.
The model code governing the construction of one- and two-family dwellings and townhouses in the United States. Updated every 3 years — local jurisdictions adopt and amend it on varying schedules.
A network of pipes, valves, sprinkler heads, and a controller that automatically waters landscaped areas. Smart irrigation controllers adjust schedules based on weather data, saving 30–50% vs. fixed timers.
A freestanding counter unit in the center of a kitchen providing additional prep space, storage, and often seating. Requires 42"–48" of clearance on all sides for comfortable traffic flow. May include a sink or cooktop.
A shut-off valve that allows a single fixture or section of piping to be serviced without shutting off the entire system. Required by code under most sinks and before toilets. Freeze or corrode after years of inactivity.
Combining federal solar ITC with state credits, utility rebates, and SREC income for maximum solar savings. Eligibility verified at installation.
A J-shaped channel that wraps a drywall edge. Common at the bottom of drywall meeting flooring or trim transitions.
A J-shaped vinyl or aluminum trim piece used at the edges of vinyl siding where it meets windows, doors, corners, and rooflines. Hides cut siding edges for a finished appearance.
The vertical framing member alongside a king stud that supports the header over a door or window opening. The header rests on top of the jack studs — also called trimmer studs.
A shorter stud beside the king stud that supports the header from below. Two trimmers are used for openings wider than 6 feet for proper bearing.
The vertical side members of a door or window frame. Pre-hung doors include jambs; slab-only doors require separate jamb installation. Jambs must be plumb, level, and properly shimmed for a door to swing freely.
The vertical sides of a window frame. Modern jamb extensions match interior wall thickness for cleaner trim installation.
A wood piece added to the interior edge of a window or door jamb to accommodate walls thicker than the standard 4 9/16" frame depth. Required when retrofitting windows into walls with added exterior insulation.
A wood hardness rating measured by force required to embed a steel ball. Red oak = 1,290; Brazilian cherry = 2,820. Higher Janka = better dent resistance for high-traffic areas.
A standardized measure of wood hardness — the force in pounds needed to embed a steel ball 0.444" into the wood. Higher is harder. Select flooring species with a Janka rating appropriate to your foot traffic level.
High-pressure water jetting of sewer drain lines using specialized nozzles to scour pipe walls clean of grease, mineral deposits, and root intrusion. More effective than mechanical snaking for recurring or severe clogs.
A reciprocating blade saw for cutting curved and irregular shapes in wood, metal, and plastic. The right blade determines the cut quality — fine tooth for clean cuts; coarse tooth for fast rough cuts.
All-purpose mud filling drywall joints. Setting compound (90, 45, 20-minute) cures by chemical reaction; pre-mixed lightweight mud dries by evaporation.
A horizontal structural member that spans between beams or walls to support floors, ceilings, and decks. I-joists (engineered) resist shrinkage and provide longer spans than dimensional lumber.
A galvanized metal bracket securing a joist to a beam or ledger. Simpson Strong-Tie is the dominant brand. Use the manufacturer-specified nails — drywall screws are not approved.
A surge protector's energy-absorption capacity. Higher joules = more or larger surges absorbed. Whole-house SPDs commonly rate 50,000+ joules; budget plug strips often <500 joules.
An enclosure where wires are joined or splice. Must remain accessible per code — never bury a J-box behind drywall. Use blank covers for unused circuits.
A K-shaped gutter profile mimicking crown molding. The most common residential gutter style in the U.S.; available in 5" and 6" widths in seamless aluminum.
A cool-season grass dominating northern lawns. Soft, dark green, self-repairing; high water demand vs. fescue.
The central wedge-shaped stone at the top of an arch that locks the other stones in place. Also a decorative element above windows and entryways in traditional architectural styles.
A small bent flashing at the bottom end of step flashing where a roof terminates into a sidewall. Diverts water away from the wall — missing kick-outs cause hidden rot inside walls.
The unit of energy used to measure electricity consumption — 1 kWh is 1,000 watts consumed for one hour. The average U.S. household uses about 900 kWh/month. Rate is typically $0.10–$0.25 per kWh.
A full-height stud on either side of a header, running from sole plate to top plate. Provides nailing surface for the header assembly and structural support.
A single-point pull for cabinet doors. Typically 1"–2" diameter. Brushed nickel, oil-rubbed bronze, matte black, and polished chrome are the most popular finishes. Consistent hardware finish unifies the kitchen aesthetic.
Pre-1940s wiring system with single conductors run through ceramic tubes and supported by knob insulators. Functional if undisturbed but cannot be insulated over and lacks a ground; many insurers refuse it.
A sprayed texture flattened with a wide knife after partial dry. Most popular modern wall texture in U.S. residential — hides imperfections without looking heavy.
Fiberglass insulation batts with a paper vapor retarder attached to one face. Installed with the vapor retarder facing the warm side (interior in cold climates). Standard in wall cavities and vaulted ceilings.
A premium denser gas fill providing better insulation than argon in narrow gaps. Used in triple-pane windows where argon's optimal gap is too thick to fit.
A premium PVDF resin paint finish on metal roofing — UV stable, color-stable, and chalking-resistant. 30–40 year warranties common.
An L-shaped trim that finishes drywall edges where it meets a different material — door jamb, exposed beam, masonry. Replaces painted exposed edges.
A round steel column filled with concrete used to support beams in basements and crawl spaces. Adjustable lally columns allow fine-tuning of height. Do not remove without engineering evaluation.
A budget plastic-laminate countertop (Formica, Wilsonart). Modern designs convincingly mimic stone; sub-$30 per sq ft installed.
A multi-layer synthetic flooring product with a photographic wood or stone image layer beneath a clear wear layer. Cannot be refinished when worn — replacement is the only option. Less expensive than hardwood or LVP.
Two glass panes bonded with a plastic interlayer. Holds shattered glass together; used in security, hurricane, and overhead skylight applications.
Professional planning and layout of outdoor spaces combining horticultural knowledge with design principles. A landscape plan shows plant placement, hardscaping, grading, and drainage — essential for complex projects.
Visible streaks where two areas of paint dried before being joined. Caused by failing to maintain a wet edge — most visible on dark colors and high sheens.
Horizontal siding boards installed with each course overlapping the one below — also called clapboard or bevel siding. Available in wood, fiber cement, vinyl, and composite materials.
Tile 15" or larger in at least one dimension. Requires a very flat substrate (no more than 1/8" variation in 10 feet), medium-bed mortar, back-buttering, and proper unsupported edge control. Creates fewer grout lines for a cleaner look.
A device that projects a perfectly level horizontal or vertical laser line for aligning tile, cabinets, shelving, and dropped ceilings. Self-leveling laser levels are more accurate and faster to set up than traditional bubble levels.
The portion of an AC's BTU rating dedicated to removing moisture from the air. Inverter and two-stage equipment provide much better latent capacity at part-load than single-stage systems.
Heat absorbed or released when water changes between vapor and liquid — the dehumidification portion of an AC's work. Higher in humid climates; oversized AC fails to remove enough latent load.
A horizontal force on a structure — from wind, earthquakes, or soil pressure. Resisted by shear walls, diagonal bracing, and foundation connections. Critical for deck safety as well as building structural integrity.
Many municipalities collect liquid latex paint for recycling. Dried-out paint can usually be discarded as regular trash.
The substrate attached to studs before plaster application — historically thin wood strips; now metal or fiberglass mesh (for stucco) or gypsum board. Metal lath is also used for setting stone and tile on walls.
A bathroom sink faucet — either single-handle, widespread (8"), or center-set (4"). WaterSense models flow at 1.5 GPM or less while still meeting performance tests.
A scheduled series of treatments — fertilization, pre-emergent weed control, broadleaf weed control, aeration, overseeding — applied throughout the year to maintain healthy, dense turf. 4–6 visits per year is typical.
Spreading a thin layer of compost or sand-soil mix over lawn. Improves soil over time; common with overseeding for best germination conditions.
A rotating shelf in a corner cabinet. Maximizes corner storage; available in full-round, kidney-shaped, and modern half-moon designs.
Paint containing lead pigment, used extensively in homes before 1978. Disturbing lead paint through sanding, scraping, or demolition releases toxic dust. Federal law requires renovation contractors to be RRP certified.
Traditional incandescent-era dimmer using forward-phase control. Works with most incandescents and halogens but causes flicker and audible buzz with many LEDs.
A gutter cover system preventing leaf and debris accumulation inside gutters. Micro-mesh systems (Gutter Helmet, LeafGuard) are the most effective; foam inserts and screen covers perform poorly over time.
A self-adhering waterproof membrane — also called ice and water shield — installed in vulnerable roof areas: eaves, valleys, dormers, and penetrations. Prevents water entry from ice dams, wind-driven rain, and roof damage.
A wireless puck (Govee, Aqara) placed near sinks, water heaters, and toilets that alerts when water is detected. Cheap insurance against undetected slow leaks.
A wall visibly out of plumb may indicate soil pressure, structural failure, or inadequate bracing. Leaning foundation walls with horizontal cracking are structural emergencies — evacuate and call a structural engineer immediately.
The horizontal board attached to the house framing that supports one end of a deck's joists. Must be through-bolted to the rim joist or band joist with lag screws and properly flashed to prevent moisture infiltration.
Bacteria that grow in stagnant warm water and cause Legionnaires' disease. Storing water at 140°F at the heater and using a tempering valve at fixtures is the recommended control strategy.
A premium U.S. HVAC brand known for their high-efficiency Signature Collection equipment — including the XC25 air conditioner (SEER2 24+) and the SL280V gas furnace. Dealer-only distribution model.
120V charging using a standard wall outlet — 3–5 miles of range per hour. Adequate for plug-in hybrids and short-commute EVs but slow for long-range vehicles.
240V charging at 16–48 amps — 25–35 miles of range per hour. Standard home installation; requires a dedicated circuit and EVSE (charging station).
Direct-current fast charging at 50–350 kW — 100–200 miles in 15–30 minutes. Commercial-only due to massive electrical service requirements and equipment cost.
The highest drywall finish level — full skim coat over all surfaces. Required for high-sheen paint, raking light conditions, and luxury finishes.
A clip-and-wedge or threaded system installed during tile setting that keeps adjacent tiles at the same height, preventing lippage (height differences between tiles). Essential with large-format tile.
Lithium Iron Phosphate battery — the dominant residential storage chemistry since 2023. Safer, longer-lasting, and lower-cost than NMC chemistry.
A professional who has met state or local requirements — including experience, exam, insurance, and bonding — to legally perform contracting work in a specific trade. Always verify contractor licenses before hiring.
A document signed by a contractor, subcontractor, or supplier releasing their right to file a mechanics lien on your property after receiving payment. Get conditional waivers throughout the project; unconditional waivers after final payment.
A pit with sewage pumps that lifts wastewater from a low elevation to a higher gravity sewer. Required when topography prevents gravity flow to the municipal sewer.
A permanently installed electrical fitting that contains the lamp and directs light. Types include recessed can lights, pendants, chandeliers, sconces, and surface mounts. Choose fixtures rated for the intended environment (damp/wet locations).
A small molding at the bottom of upper cabinets that conceals under-cabinet lighting. Standard in modern remodels.
How much visible light a paint color reflects (0 = black, 100 = white). LRV influences perceived room size and energy use; bright LRVs above 70 reduce daytime lighting needs.
Applying limewash to exterior brick for a softened, European-cottage look. Allows brick to breathe; lasts 5–7 years before refresh.
A breathable mineral paint made from slaked lime. Creates a soft, layered, weathered look on brick, stucco, and plaster. Requires no primer; lasts 5–7 years before refresh.
A high-temperature safety switch that shuts off the gas valve if the heat exchanger overheats. Frequent tripping indicates restricted airflow — dirty filter, blocked returns, or undersized ductwork.
The pair of insulated copper refrigerant tubes (and control wiring) connecting indoor and outdoor units of a split or mini-split system. Pre-charged line sets simplify DIY-friendly mini-split installs.
A long, narrow shower drain placed at one wall. Allows single-direction floor slope with large-format tile vs. four-direction slope to a center drain.
A structural horizontal member spanning a door or window opening in masonry construction to carry the load above. Steel lintels are common in brick veneer construction. Check for rusted, cracked, or displaced lintels in older homes.
Height differences between adjacent tiles. ANSI A108 limits lippage to 1/32" for floors with 1/8" grout; large-format tiles require leveling clip systems to manage lippage.
The smaller-diameter refrigerant line carrying high-pressure liquid from the condenser to the indoor evaporator's metering device. Should be insulated only on long runs in hot attics to prevent flash gas.
A permanent filter on the liquid line that absorbs moisture and traps debris. Replace anytime the refrigerant circuit is opened for service — cheap insurance against future failures.
When liquid refrigerant enters the compressor instead of vapor — causes catastrophic mechanical damage. Prevented by accumulators, crankcase heaters, and proper charging procedures.
A roll- or trowel-applied liquid that cures into a waterproof film. Common products: Hydro Ban, RedGard. Cheaper than sheet membranes but requires careful application thickness.
A fluid-applied elastomeric coating that cures into a seamless waterproof membrane. Useful for irregular roofs and reroofing without tear-off; needs accurate film thickness.
A pre-agreed daily penalty for project delays written into a contract. Common on time-sensitive commercial projects. Rarely used in residential contracts but worth discussing when schedule is critical.
Flexible PVC-jacketed metal or non-metallic conduit used for connecting motors, pumps, and outdoor disconnects. Resists oil, water, and vibration.
Variable loads on a structure from occupants, furniture, snow, and appliances. Combined with dead load to size beams, columns, and footings. Residential floor live load is typically designed for 40 psf.
A modern milling method that captures all three grain patterns (plain, quarter, rift) in each board. Produces character-grade flooring with rustic appeal.
An engineering calculation (ACCA Manual J standard) used to determine the exact heating and cooling capacity needed for a home. Oversized systems cycle on and off rapidly, causing humidity problems and shortened equipment life.
An NEC 220 worksheet that calculates total demand for a residential service to verify capacity. Required for additions, EV chargers, hot tubs, and any major load addition.
Another term for an electrical distribution panel or breaker box. Receives service entrance power and distributes it to branch circuits through individual breakers.
A structural element that carries the weight of the building above — walls, beams, columns, and foundations. Never remove a load-bearing wall without a structural engineer's assessment and proper header installation.
Extended HVAC runtimes that improve dehumidification and even temperatures across a home. The goal of properly sized inverter and two-stage equipment compared to short-cycling single-stage systems.
A drainage elbow with a longer-radius bend than a standard 90°. Reduces flow restriction and clog risk in horizontal drain lines. Required by some codes on any horizontal-to-horizontal direction change.
A vent for an island sink that loops up under the counter, then back down before tying into the drain system. Necessary because there's no wall to extend a traditional vent.
Blown-in fiberglass, cellulose, or mineral wool. Self-fills around obstacles for fewer thermal bridges than batts. Standard for attic top-up insulation.
Heavy-backed vinyl tile that uses friction and weight rather than glue or click-lock. Allows easy tile replacement; typical commercial application.
The percentage of a lot's total area covered by buildings, driveways, and impervious surfaces. Most zoning codes limit lot coverage to 30–50% — restricting how much area can be paved or built upon.
Reduced water pressure at all fixtures may indicate a failing pressure-reducing valve, partially closed main valve, corroded galvanized pipes, or a water main issue. Low pressure at one fixture indicates a local aerator clog or shutoff issue.
A microscopic metallic-oxide coating on window glass that reflects infrared while letting visible light pass. Solar-control low-E for hot climates; passive low-E for cold climates.
Low-emissivity glass with a metallic coating that reflects radiant heat, keeping heat in during winter and heat out in summer. Reduces UV transmission by 70–80%, protecting interior furnishings from fading.
A microscopically thin metallic coating on window glass that reflects infrared and UV radiation. Hard-coat (pyrolytic) Low-E is more durable; soft-coat (sputter) Low-E provides better performance but must be interior to an insulating unit.
Code term for any roof with pitch under 2/12. Subject to different underlayment, fastening, and material rules than steep-slope shingled roofs.
Roofing systems designed for pitches below 2:12, including TPO, EPDM, modified bitumen, and built-up roofing (BUR). Standard asphalt shingles cannot be used below 2:12 without voiding manufacturer warranties.
A measure of total light output. A 60W incandescent produces about 800 lumens; modern LED fixtures provide 800 lumens using just 8–10 watts.
Efficacy — how much light a lamp produces per watt of electricity. Modern LED lamps achieve 80–120 lumens/watt vs. incandescent at 12–15. The DOE has phased out most low-efficacy general lamps.
A wireless dimmer and switch system with no-neutral options. Bridges to smart-home platforms via the Lutron hub. Highly rated for reliability and ease of installation.
A unit of illuminance (light falling on a surface) equal to one lumen per square meter. Kitchen countertops benefit from 300–500 lux; hallways need 100–150 lux; detailed task areas may require 750–1000 lux.
Engineered lumber made of glued wood veneers. Stronger and more stable than dimensional lumber; common for headers, beams, and long-span girders.
An engineered wood product made from layered wood veneers glued together, providing consistent strength and resistance to warping. Stronger than dimensional lumber; often used as ridge beams, headers, and flush beams.
A water-resistant flooring product made from multiple PVC layers with a realistic wood or stone photographic layer and a clear wear layer. SPC (stone-plastic composite) core is more rigid and dent-resistant than WPC core.
Luxury Vinyl Plank — a click-lock or glue-down vinyl floor with realistic wood-grain printed top layer and embossed texture. Waterproof; ideal for kitchens, basements, and rentals. $3–$8 per sq ft.
Luxury Vinyl Tile — vinyl flooring in tile or stone-look planks. Same construction as LVP with stone visuals. Common in modern bathrooms and laundry rooms.
An above-floor toilet that grinds waste with a powered impeller and pumps it up to a sewer line. Common in basement remodels where excavating for gravity drains isn't feasible.
The single large breaker at the top of a service panel that disconnects all branch circuits at once. Must be sized to match the service entrance conductor ampacity (100A, 200A, 320A).
A subpanel without a main breaker, fed from a breaker upstream. Allowed when the panel is in the same building as the service disconnect — common in remodels and detached-garage feeders.
The valve where water service enters the home. Every homeowner should know its location and operate it annually — corroded valves often fail when needed in an emergency.
The primary valve that stops all water flow to the home, located either at the street meter box or inside near the foundation. Every household member should know its location for plumbing emergencies.
Outside air introduced to replace air exhausted by powerful kitchen hoods, fireplaces, or large bath fans. Required by code for hoods over 400 CFM in tight homes to prevent depressurization and backdrafting.
A central distribution block that branches one supply and return into multiple radiant-floor or panel-radiator loops. Includes flow meters, balancing valves, and isolation valves.
A grouped assembly of zone valves at one location. Easier to service than valves scattered around the yard.
A pressure gauge used to measure gas line pressure, manifold pressure, and static pressure in duct systems. Digital manometers are essential for proper furnace setup and duct diagnostics.
A four-sided roof with steep lower slopes and shallow upper slopes. French in origin; allows full upper-story headroom in single-story tax jurisdictions.
ACCA's published method for sizing supply and return ducts based on calculated airflow and acceptable static pressure. Pairs with Manual J — needed to deliver Manual J's calculated airflow to each room.
The ACCA-published room-by-room heating and cooling load calculation method. Required for proper equipment sizing — most homes have oversized AC by 20–60%, which hurts comfort and efficiency.
ACCA's method for matching specific HVAC equipment to a Manual J load calculation. Considers latent vs. sensible capacity at design conditions to ensure adequate dehumidification, not just temperature control.
A switch that selects between utility power and a generator for a defined set of circuits. Cheaper than automatic transfer switches; requires homeowner to flip the switch during outages.
Maximum Performance score — independent testing of toilet bulk solid removal. Top-rated toilets remove 1,000+ grams in a single flush. Cross-reference with WaterSense before buying.
A metamorphic natural stone used for countertops, flooring, and decorative accents. Beautiful but high-maintenance — etches from acids (lemon juice, wine) and requires regular sealing. Calacatta and Carrara are premium Italian varieties.
Premium natural-stone countertop. Beautiful but easily etches from acidic foods; bakers love it for cool pastry surface. Requires acceptance of patina over time.
The price a willing buyer and willing seller agree upon in an open market transaction. Distinct from assessed value, appraised value, and replacement cost. Determined by supply, demand, condition, and location.
A Minnesota-based premium window brand known for wood and aluminum-clad lines. Higher price point; preferred for high-end custom homes.
Construction using materials like brick, stone, concrete block (CMU), or tile, set in mortar. Masonry is durable and fire-resistant but requires specialized tools and skills. Repointing deteriorated mortar joints extends masonry life significantly.
Specialty exterior paints for brick, stucco, and concrete. Look for breathable formulas — non-breathable paint can trap moisture and cause spalling.
The primary bathroom in a home attached to the master bedroom suite. Premium features include double vanity, freestanding tub, large walk-in shower, heated floors, and separate water closet. One of the highest-ROI remodeling projects.
The highest level of contractor licensing — a master electrician, master plumber, or master HVAC technician is authorized to pull permits and supervise journeymen and apprentices in their trade.
A valve that opens with each irrigation cycle and closes when not in use. Limits leak losses; required on commercial systems and some new residential installs.
A water-based duct-sealing paste. Permanent flexible seal; embed fiberglass mesh tape over wide joints for reinforced sealing.
A detailed list of all materials required for a construction project with quantities, specifications, and estimated costs. The basis for accurate contractor bids and owner cost verification.
Manufacturer warranty against shingle defects. Standard architectural shingles offer 30-year limited; premium products offer 50-year or lifetime warranties.
A nearly-flat finish with slightly more durability than traditional flat. Premium matte paints (Sherwin-Williams Emerald Matte) are scrubbable — combining low sheen with bathroom-grade washability.
A unified smart-home interoperability standard from CSA. Devices certified Matter work across Apple Home, Google Home, Amazon Alexa, and SmartThings.
Metal-Clad cable — conductors inside a flexible aluminum or steel armor. Common in commercial; allowed in residential where NM is restricted (return-air plenums, exposed runs).
A smooth, dense composite panel made from wood fiber and resin — used for paint-grade cabinetry, trim, and shelving. Machines cleanly but is heavy, not water-resistant, and doesn't hold fasteners at edges as well as plywood.
Cabinet doors made of MDF, often painted. Smoother paint surface than solid wood; can swell if wet but more dimensionally stable.
A permit required for HVAC equipment replacement, duct modifications, and new system installations. Triggers inspections verifying proper sizing, venting, refrigerant handling, and code compliance.
A legal claim filed against a property by an unpaid contractor, subcontractor, or supplier. Liens can prevent property sale or refinancing until resolved. Protect yourself with signed lien waivers at each payment milestone.
The legal right of a contractor or supplier to file a claim against your property for unpaid work or materials. Protect yourself with signed lien waivers at each payment and verify subcontractor payment status.
A 4–5" deep filter housing that holds high-MERV pleated media with 4× the surface area of a 1" filter. Provides MERV 11–16 filtration without crushing static pressure. Service every 6–12 months.
A white or printed thermally-fused laminate surface on MDF or particleboard — used for cabinet interiors, shelving, and closet systems. Durable, easy to clean, but exposed edges chip and require edge banding.
Minimum Efficiency Reporting Value — a 1–16 scale measuring filter ability to capture particles. MERV 8 catches dust mites; MERV 13+ captures bacteria and virus carriers. Higher MERV adds duct restriction.
Corrugated steel panels used as structural floor or roof decking in commercial construction. Provides a permanent form for concrete pours and composite structural action.
A roofing system using steel, aluminum, copper, or zinc panels or shingles. Standing seam metal roofs last 40–70 years and provide Class A fire resistance. Eligible for 35% insurance discounts in wind-prone areas.
Light-gauge steel framing used for interior non-load-bearing walls and commercial construction. Metal studs are straight, lightweight, and don't warp or shrink. Require special drywall screws and electrical work adjustments.
The weatherproof socket that holds the utility revenue meter. Homeowner-owned; a damaged or burned meter base requires utility coordination to replace because the meter must be removed.
An all-aluminum heat-exchanger design used in some modern AC condensers. Lighter and more efficient than copper-aluminum coils, but more vulnerable to formicary corrosion in coastal salt-air environments.
A premium roller cover that holds more paint and leaves a finer finish than woven covers. Worth the cost for cabinets and high-sheen wall paint.
A small inverter on each individual solar panel. Better partial-shade performance; built-in monitoring per panel; higher cost than string inverters.
A precision vacuum gauge used during evacuation to confirm a clean, dry refrigerant system. Reads in microns of mercury — the lower the number, the deeper the vacuum and the dryer the system.
A combination microwave and range hood installed above a cooktop. Requires a dedicated 20A circuit. Recirculating models don't require exterior venting; external exhaust models must vent to the outdoors for maximum cooking odor and grease removal.
Black or green spotting on north-facing exterior paint. Treat with diluted bleach or a mildewcide cleaner before repainting; otherwise, new paint will be infected within months.
An acoustic ceiling tile product made from mineral wool, used in drop ceiling grid systems. Provides NRC (noise reduction coefficient) ratings up to 0.90 — highly effective for sound absorption in offices and finished basements.
A silicate-based paint that chemically bonds to mineral substrates (brick, stone, concrete). Breathable, UV-stable, and lifetime warranties available. Romabio is the leading U.S. brand.
A fire-resistant insulation made from spun basalt or slag fibers. Sound-absorbing, mold-resistant, and provides better thermal performance when wet compared to fiberglass. Easier to cut cleanly than fiberglass.
Insulation made from molten rock or slag — Rockwool is the dominant brand. Higher R-value, fire-resistant, and water-shedding vs. fiberglass; better acoustic performance.
A ductless HVAC system with an outdoor compressor connected to one or more wall-mounted indoor heads via small refrigerant lines. Ideal for additions, garages, and homes without existing ductwork. Qualifies for federal tax credits.
A ductless heat pump system with one outdoor unit feeding 2–8 indoor heads on independent zone controls. Allows separate setpoints per room and avoids running ductwork in retrofits.
A ductless heat pump system with one outdoor unit serving one indoor head. Common for room additions, garages, and bonus rooms where extending ducts is impractical. Typical cost $3,500–$6,000 installed.
A 45° angled cut joining two pieces of trim. Used at outside corners and most picture-frame casings; opens with seasonal wood movement at inside corners.
The market leader in ductless mini-split systems in North America. Hyper-Heating INVERTER (H2i) systems heat effectively to -13°F. The Diamond Contractor program provides 12-year parts and labor warranties when installed by certified contractors.
A thermostatic valve at the water heater outlet that blends cold water down to a safe distribution temperature (120°F) while letting the heater store water hotter (140°F) for Legionella control.
An asphaltic roll-roofing system with polymer modifiers. Applied with hot asphalt, cold adhesive, or torch. Good for low-slope residential and small commercial applications.
A flat roofing system using polymer-modified asphalt in sheet form, torch-applied, cold-applied, or self-adhering. More flexible and tear-resistant than traditional built-up roofing. Common on low-slope residential and commercial roofs.
Thinset with polymer additives that improve flexibility and bond strength. Best for porcelain, glass, and outdoor tile installs.
A high-efficiency gas furnace that adjusts gas valve and blower speed in 1% increments to match load. Maintains tighter temperature swings and operates more quietly than single- or two-stage furnaces.
A material — poly sheeting, housewrap, or waterproof membrane — that resists moisture infiltration through floors, walls, or roofs. Critical in crawl spaces, below-grade walls, and bathroom wet areas.
A systematic grid-based survey of a water-damaged area using moisture meters and thermal cameras to identify the full extent of affected materials. Guides targeted drying and documents progress for insurance purposes.
A diagnostic tool measuring the moisture content of wood, drywall, and concrete — expressed as a percentage. Used by inspectors, water damage restorers, and flooring installers. Pin-type meters puncture the surface; pinless meters scan remotely.
A pin or pinless device measuring wood moisture. Required tool for hardwood installation; both subfloor and flooring should be within 4% MC of each other before nailing.
A calcium-chloride or RH probe test of concrete slab moisture. Typical limits are 3 lbs/1,000 sq ft/24hr (calcium chloride) or 75% RH (in-slab probe).
Tests including calcium chloride and relative humidity probes that measure moisture vapor emission from concrete slabs before installing flooring. Excessive moisture will cause adhesive failure, cupping, and delamination.
Fungi that begin to colonize wet building materials within 24–48 hours of water damage. Mold growth behind walls and under floors can remain undetected for months, causing chronic health effects and structural damage.
The professional removal and decontamination of mold-affected building materials using containment, HEPA air scrubbing, and antimicrobial treatment. Always fix the moisture source before remediating or mold will return.
Drywall with paperless or mold-treated facers. Required by code in bathrooms in some jurisdictions; recommended near plumbing fixtures.
A home security system connected to a professional monitoring center that dispatches police, fire, or medical responders when an alarm is triggered. Monthly monitoring fees range $20–$50. More effective than unmonitored local alarms.
A solar panel made from single-crystal silicon. Highest efficiency (20–23%); best for limited roof area. Higher cost per watt than poly.
A mixture of Portland cement, sand, and water used to bond masonry units, set tile, and fill joints. Different mortar types (S, M, N) are specified by compressive strength for different applications.
The percentage of the tile back in contact with the mortar bed after installation. Code requires 80% coverage in dry areas, 95% in wet areas and exterior applications. Thin mortar ridges without back-buttering cause hollow tiles and failures.
A high-end lockset with mechanism mortised into the door edge. Common on premium and historic doors; smoother operation and longer life than cylindrical locks.
Small tile (under 2"×2") sold pre-mounted on mesh sheets. Common for shower pans, accent strips, and backsplashes. Sheet alignment is critical for clean grid lines.
Reduction of mosquito populations through habitat elimination (standing water), larvicides in remaining water, and targeted adulticide spraying. Professional barrier sprays treat vegetation where mosquitoes rest and can reduce populations by 80–90%.
A sensor that detects movement within its field of view using passive infrared (PIR), microwave, or dual-technology sensing. Used to trigger security alarms, lights, and cameras. Proper placement reduces false alarms from pets and HVAC airflow.
A passive infrared (PIR) sensor detecting movement. Modern dual-tech sensors combine PIR with microwave for fewer false alarms from pets.
An elevated septic drainfield used where soils are too shallow, slow, or fast for conventional fields. More expensive to install ($15,000–$30,000) and requires a pressurized dosing pump.
A multi-stream rotary sprinkler nozzle with low precipitation rate. Water-saving alternative to fixed sprays in lawn renovations.
Microparticle Performance Rating — 3M's proprietary filter scale used on Filtrete consumer filters. MPR 1500 ≈ MERV 12. A marketing scale that doesn't match industry standards.
Contractor slang for drywall joint compound — the gypsum paste used to tape, coat, and texture drywall surfaces. Setting-type compound hardens by chemical reaction (faster, harder); drying-type compound dries by evaporation.
A traditional sloped mortar shower base over a PVC or sheet-membrane liner. Skilled tradework but vulnerable to leaks if not pitched and waterproofed correctly.
An electrical device ring installed on the face of a stud to position an outlet or switch box at the correct depth for the final wall surface. Required to ensure device faces are flush with finish walls in new construction.
The lowest horizontal wood member of a structure, bolted to the concrete foundation. Also called a sill plate. Pressure-treated lumber is required for mud sills to resist soil moisture and pest damage.
A process that fills voids under sunken concrete slabs by pumping a slurry of cement, soil, and water under the slab through drilled holes, raising it back to level. Less expensive than slab replacement; may not last as long as polyfoam lifting.
A 3–4 inch deep mulch ring around trees, extending to the drip line. Reduces lawn-mower damage and competition; keep mulch 3 inches from trunk.
Mulch piled against a tree trunk — incorrectly thought to insulate roots. Causes bark rot and root girdling; keep mulch 3 inches from trunks.
The vertical structural member dividing two adjacent windows in a multi-window assembly. Distinct from muntins, which divide individual lites of a single window.
A furnace with a blower motor offering 3–5 fixed speeds. Allows technicians to set heating, cooling, and continuous-fan speeds independently. A middle ground between PSC and full variable-speed.
Two 120V circuits sharing a neutral, fed from opposite phases via a 2-pole breaker. Allowed by code with proper handle ties; common in older kitchens and small-appliance loads.
A database used by real estate agents to list and share property information. Access to the MLS is the primary value provided by listing agents — most public websites pull data from the MLS.
The structural divider between individual glass panes in true-divided-lite windows. Decorative grilles imitate muntins on modern windows.
A diluted form of hydrochloric acid used to clean concrete, remove efflorescence and mortar stains, lower pool pH, and etch concrete surfaces before coating. Requires protective gloves, eye protection, and good ventilation.
A hardwood flooring installation method using a pneumatic floor nailer to drive cleats through the tongue of each plank into the subfloor. The standard method for solid hardwood — not suitable for concrete or radiant heat.
The specified spacing and placement of nails required by code or manufacturer instructions for structural sheathing, roofing, and siding. Improper nailing patterns reduce wind resistance and can void product warranties.
A landscape using locally native plants. Lower water and chemical needs; supports pollinators and wildlife; complies with HOA wildflower allowances in many areas.
Quarried stone materials — granite, marble, limestone, slate, quartzite, travertine — used for flooring, countertops, wall cladding, and outdoor paving. More expensive than manufactured alternatives but unique and long-lasting.
NFPA 70 — the National Electrical Code — the comprehensive standard for electrical safety adopted by most U.S. jurisdictions. Updated every 3 years; local adoption lags 1–2 cycles. Specifies wiring methods, protection devices, and installation requirements.
The nationally recognized standard for safe electrical installation, published by the National Fire Protection Association (NFPA 70) and updated every 3 years. Adopted by most jurisdictions — often 1–2 cycles behind the current edition.
Waterproofing applied to the interior (wet) side of a foundation wall — less effective than positive-side (exterior) waterproofing but often the only practical option in finished basements or when excavation isn't feasible.
A 240V/50A receptacle commonly used for portable EV chargers, RV pedestals, and electric ranges. Requires GFCI protection per 2020 NEC for EV charging applications.
A 240V/50A receptacle used for welders and some EV chargers. Three-prong (no neutral) — not interchangeable with NEMA 14-50 four-prong outlets.
Google's line of smart learning thermostats — the Learning Thermostat programs itself based on your patterns. Compatible with most HVAC systems. Requires a C-wire for reliable operation; C-wire adapters are available.
A solar billing arrangement crediting exports at a wholesale rate (lower than retail). Replaced traditional net metering in California and other states with high solar penetration.
The actual open area of a vent after deducting screens and louvers. Listed in manufacturer specs; required to verify code compliance on attic ventilation calculations.
A utility billing arrangement where excess solar generation banks credit against future consumption. Policy varies by state; California's NEM 3.0 reduced credit values significantly.
A residence that produces as much energy as it consumes on an annual basis, typically through solar panels combined with high-efficiency HVAC, appliances, insulation, and air sealing. Requires a whole-home energy audit to design.
A dedicated device storing security camera footage. Eliminates monthly cloud-storage subscriptions; requires hardwired POE cameras.
The return current-carrying conductor in a circuit, typically white or gray. Provides the return path for current in 120V circuits. Must never be broken by a switch — only the hot conductor is switched.
A window with a nailing flange (fin) for secure flashing and house-wrap integration. Used in new builds and full-frame replacements; not for inserts.
An electrical box with nailing flanges designed to attach to a stud or joist before drywall is installed. Standardized depth ensures device flushness with finished wall surfaces.
The main vertical post at the bottom, top, or turns of a stair railing. Newel posts are structural anchors for the handrail and must be solidly attached to the framing — not just the floor surface.
The National Fenestration Rating Council label affixed to windows showing certified U-factor, SHGC, VT, and air leakage. Look for it on every window quote.
Flowing dry nitrogen through copper line sets while brazing to prevent oxide scale formation. Required by manufacturers — internal scale flakes off in operation and clogs metering devices, voiding warranties.
Modern Romex — non-metallic sheathed cable with hot, neutral, and ground conductors rated 90°C. Standard for residential branch wiring; not for wet locations or direct burial.
Nickel Manganese Cobalt battery chemistry. Higher energy density than LFP; phased out of residential storage due to fire-risk and cost.
A smart switch (Lutron Caseta, Aqara T1) that operates without a dedicated neutral wire by drawing micro-current through the load. Useful for older homes with two-wire switch loops.
An 80% AFUE gas furnace that vents hot flue gases through a metal B-vent to a chimney. Simpler and cheaper to install than condensing models; no condensate drain or PVC venting required.
A budget bidet seat that uses incoming water pressure only, with no power required. Cleaning function works well but no warm water or heated seat; under $100.
A disconnect with only on/off switching; overcurrent protection comes from the upstream breaker. Cheaper than fused disconnects when sizing rules align.
A partition wall that carries only its own weight, not structural loads from above. These can often be removed without engineering, but always confirm — cutting into a bearing wall is a costly and dangerous mistake.
A premium roofing warranty with full coverage for the entire term. Available with system warranties when all components (shingles, underlayment, hip/ridge, starter) come from the same manufacturer.
A digital recorder that stores video from IP cameras, typically to a local hard drive. NVR systems offer higher resolution than DVR systems and are easier to expand with additional cameras.
The most resilient and durable common carpet fiber. Premium pricing; preferred for stairs, hallways, and high-traffic areas with active families and pets.
The reversing valve control wire on a heat pump system. O energizes the valve in cooling mode (most US brands); B energizes in heating mode (Rheem/Ruud). Mis-wiring runs the system in the wrong mode.
Frosted, ribbed, or patterned glass for privacy. Common in bathroom and front-door sidelights; transmits light without revealing detail.
The building code category assigned to a building based on its intended use — residential (R), business (B), educational (E), assembly (A), etc. Different classifications have different code requirements for fire resistance, egress, and occupancy load.
A wall-mounted PIR or ultrasonic sensor that turns lights on when motion is detected. Reduces electric bills in closets, garages, and bathrooms. Choose vacancy mode for occupancy-only off control.
A misaligned joint between sections of sewer pipe — common in old clay or Orangeburg lines — that catches debris and roots. Spot repair or full lining is required to fix.
A traditional paint using linseed or alkyd oil as the vehicle. Provides excellent adhesion and durability on trim and cabinets. Long dry time, strong fumes, and solvent cleanup. Water-based alkyds now offer similar performance with easier cleanup.
Traditional site finish with longer dry time and stronger odor. Ambers warmly over years; classic choice for traditional and oak floors.
An electrical box with retractable wings designed for retrofit installation in existing drywall. Cheaper than cutting drywall to install a new-construction box on a stud.
A layout combining two or more rooms (kitchen, dining, living) into one large open space by removing interior walls. Requires careful structural analysis — many walls between these spaces are bearing walls requiring engineered headers.
A receptacle with no equipment ground connection. Common in pre-1962 homes with two-wire NM cable. Code-approved fixes: rewire, add a GFCI device, or replace with a non-grounded outlet.
A roof valley with exposed metal flashing in the center channel. Visually distinctive; sheds water faster and lasts longer than closed valleys, especially in heavy snow regions.
A roof valley detail using a metal liner (aluminum, galvanized, or copper) with shingles cut back from the valley center. Provides excellent water-shedding performance and is easier to clear of debris than closed valleys.
Soft polyurethane spray foam with open-cell structure. R-3.7 per inch; allows vapor passage. Cheaper than closed-cell; common in interior walls for sound and unvented attics in moderate climates.
A simplified residential load calculation method that yields a smaller required service than the standard method. Used by most residential electricians for new and upgraded panels.
A fine sprayed texture resembling orange peel skin. Common in production homes; subtle but easy to match for wall repairs.
A bituminized fiber sewer pipe used 1940s–1970s that softens and collapses with age. If found during inspection, plan for full sewer replacement within 1–5 years.
A structural panel made from compressed wood strands and adhesive. The dominant replacement for plywood in sheathing applications — used for walls, roofs, and sub-floors. Must be protected from sustained moisture exposure.
Oriented strand board roof decking. Sensitive to prolonged moisture exposure; older OSB (T1-11 era) can delaminate when wet. Modern radiant-barrier OSB has integrated foil for thermal control.
Oriented strand board structural panels nailed to wall studs and roof rafters — the dominant wall and roof sheathing material since replacing plywood in the 1990s. Must be protected from sustained moisture before installation.
Oriented strand board floor sheathing — typically 23/32" T&G. Stronger than 5/8" plywood at lower cost; vulnerable to swelling if wet during construction.
A versatile tool with a vibrating head for cutting, sanding, scraping, and grinding in tight spaces — essential for plunge cuts in flooring, flush-cutting door casings, and tile removal. Accepts dozens of specialized blades and accessories.
The Occupational Safety and Health Administration — the federal agency that regulates workplace safety. Contractors must comply with OSHA standards for fall protection, trenching, electrical safety, and more. Violations can result in significant fines.
A masonry or pre-fab outdoor fireplace. Provides directional heat and architectural focal point. Wood-burning vs. gas-burning options affect site requirements.
A built-in cooking area with grill, sink, refrigerator, and storage. Typical cost $5,000 (basic) to $50,000+ (luxury).
A 12-volt transformer powering low-voltage landscape lighting. Sized 100–600 watts for residential systems.
A control strategy that varies boiler supply-water temperature based on outdoor conditions. Saves 10–15% on heating costs while improving comfort over fixed-setpoint operation.
A wired or wireless temperature sensor that reports outdoor air temp to the thermostat or control board. Enables outdoor reset, balance-point control, and auxiliary-heat lockout strategies.
An electrical device that provides a point of power connection. Standard outlets are 15A/120V. Code now requires tamper-resistant outlets in all new residential installations. GFCI outlets are required in wet locations.
Metal or vinyl trim protecting outside drywall corners from damage. Crimped or screwed in place before mudding.
A permit issued without plan review — typically for simple, well-defined projects (water heater replacement, re-roofing, minor electrical). Expedited process allowing same-day permit issuance for qualifying work.
The horizontal distance the roof extends beyond the exterior wall. Overhangs protect siding and windows from rain and provide shade that reduces summer solar gain. Typical residential overhang: 12"–24".
A condition where more current is drawn through a circuit than its rated capacity, causing the breaker to trip. Chronic overloads without tripping (on undersized fuses) cause insulation damage and electrical fires.
Spreading new grass seed over existing thin lawn. Pair with aeration in fall (cool-season) or late spring (warm-season) for best germination.
Owens Corning's top contractor designation, qualifying for Platinum Protection warranties with extended coverage.
A U-shaped section of pipe under sinks, tubs, and showers that retains water to block sewer-gas odors. Code requires every fixture to have a P-trap; never bypass with a flexible accordion trap (illegal in most states).
Square feet covered per gallon. Most premium paints cover 350–400 sq ft; cheaper paints cover 250–300 sq ft per coat. Color changes and porous surfaces reduce coverage.
A preparatory coating applied before paint to improve adhesion, seal porous surfaces, and block stains. Shellac-based primers seal the strongest stains; PVA primer primes raw drywall; bonding primer adheres to slick surfaces.
A rolling tool used to apply paint quickly to flat surfaces. Nap thickness determines texture: 3/8" for smooth walls; 1/2" for light texture; 3/4"–1" for rough surfaces. Microfiber rollers provide the smoothest finish.
The orifice size on an airless paint sprayer. 311 (3" fan, 0.011" orifice) for trim and cabinets; 517 (5" fan, 0.017" orifice) for siding and walls. Match tip to coating viscosity.
Permanently painted brick using exterior masonry paint. Difficult to reverse without sandblasting; consider lime wash for a similar look that's removable.
Kitchen or bathroom cabinets finished with paint rather than stained wood. White and two-tone painted cabinets are among the most popular kitchen styles. Professional spray application provides the smoothest finish.
Low-tack masking tape (FrogTape, ScotchBlue) that releases cleanly without pulling paint. Higher quality tapes prevent paint bleed under the edge.
A modern flat steel hydronic heat emitter that replaces cast-iron radiators. Lower water content allows quick response to thermostat calls. Common in new European-style systems.
An appliance designed to accept a custom panel matching surrounding cabinetry, creating a seamless built-in appearance. Common for dishwashers, refrigerators, and wine coolers in high-end kitchen designs.
Replacing an existing electrical panel with a larger capacity unit — typically upgrading to 200A service to support modern loads including EV chargers, heat pumps, and high-draw appliances. Costs $1,800–$4,500 installed.
An engineered wood product (TimberStrand, Parallam) made from long wood strands oriented parallel and bound with resin — used for large beams, columns, and headers where consistent high strength is required.
A low wall at the edge of a flat roof, balcony, or terrace. Parapet walls cap flat roof edges and must be properly waterproofed and capped with metal or stone coping to prevent water infiltration.
A thin coat of mortar applied to the face of a concrete block or masonry wall to create a smooth surface and improve water resistance. Applied both as a finish coat and as prep for waterproof coatings.
Traditional cabinet door covering part of the face frame, with the frame visible around each door. Less expensive than full overlay or inset.
A composite panel made from wood particles and adhesive — used for countertop substrate, shelving, and furniture. Less moisture-resistant than MDF or plywood; swells and deteriorates when wet. Not suitable for flooring.
An ultra-low-energy building standard requiring super-insulation, triple-pane windows, airtight construction (<0.6 ACH50), and heat recovery ventilation. Passive House buildings use 75–90% less heating and cooling energy than typical construction.
Building design that uses natural heat gain and loss through windows, thermal mass, and building orientation to reduce HVAC loads without mechanical systems. Includes south-facing glazing, thermal mass floors, and roof overhangs.
A trowelable cement-based filler used for spot leveling and feathering. Selects depend on substrate and finish flooring product warranty requirements.
A short ground-level fixture lighting walkways. LED retrofits last 10+ years vs. halogen replaced annually.
Sand mixed with polymer binders for paver joint filling. Hardens when wet; resists weed growth and erosion. Reapply every 5–10 years.
Individual masonry units — brick, concrete, or natural stone — used to construct patios, walkways, driveways, and pool decks. Pavers can be individually replaced if damaged and provide excellent drainage through permeable joints.
A free-standing outdoor structure with full roof. Provides full weather protection; often paired with outdoor kitchens.
A surety bond guaranteeing that a contractor will pay subcontractors and suppliers — protecting homeowners from mechanics liens filed by unpaid subs. More common on commercial work and large residential projects.
Photocatalytic Oxidation purifier — uses UV light + a catalyst (typically titanium dioxide) to break down VOCs and odors. Effective in some applications but byproduct testing is essential.
Small, rounded gravel stones (3/8" diameter) used for pathways, play areas, drainage, and as a decorative mulch alternative. Self-compacting to some degree — requires edging to keep in place.
An aggregate pool finish (Pebble Tec, PebbleSheen) longer-lasting than plaster. Premium pricing; 20+ year life.
A bathroom sink supported by a floor-mounted column rather than a vanity cabinet. Pedestal sinks provide a clean, airy look but offer no storage. The P-trap and supply lines are exposed — pipe aesthetics matter.
Removable adhesive wallpaper popularized for rentals and accent walls. Lower-tack adhesive than traditional pasted papers; remove without damaging walls.
A painting failure where paint film separates from the substrate, caused by moisture infiltration, poor surface prep, incompatible products, or insufficient adhesion. Address the moisture source before repainting.
Porcelain Enamel Institute abrasion rating: I (wall only), II (light traffic), III (residential floor), IV (light commercial), V (heavy commercial). Match rating to traffic level.
A major U.S. window manufacturer with wood, fiberglass, vinyl, and aluminum-clad lines. Mid- to upper-tier residential brand sold direct and through specialty dealers.
A self-feeding wood-pellet appliance with electric auger and combustion fan. Cleaner-burning than cordwood and easier to operate. Requires electricity to run; pair with battery backup in outage-prone areas.
A light fixture suspended from the ceiling by a cord, chain, or rod — used over kitchen islands, dining tables, and entryways. Hung 30"–36" above countertops; 60"–72" above dining tables depending on ceiling height.
Hardwax or tung-oil finish that soaks into wood rather than forming a film on top. Beautiful matte finish; easy spot repair but requires periodic recoating.
A silane-, siloxane-, or silicate-based concrete sealer that soaks in. No surface film; doesn't change appearance; resists oil, salt, and moisture penetration.
A wood stain that absorbs into the surface rather than forming a film. Easier to maintain than film-forming finishes; never peels or flakes.
Small round porcelain tiles named for their resemblance to pennies. Classic 1920s bath flooring; provides excellent slip resistance from the dense grout pattern.
Passivated Emitter Rear Cell — a silicon-cell technology with passivation on the back. Industry standard from 2018–2023; being replaced by TOPCon.
A soil test measuring how quickly water absorbs into the ground at a proposed drainfield. Determines whether — and what type of — septic system the site can support.
A plant that returns year after year from the same root system, typically dying back in winter in cold climates. Hostas, daylilies, and black-eyed Susans are popular perennials. Requires minimal replanting once established.
A surety bond guaranteeing that a contractor will complete the work as specified. If the contractor defaults, the bonding company steps in to complete the project. Required on most public projects and some large residential contracts.
An open-roof outdoor structure with cross beams. Shade structure for patios; supports vines and string lights. Cedar and aluminum are popular materials.
A retractable canvas sail mounted to pergola posts. Adds shade flexibility; modern alternative to vine-grown pergolas.
A lightweight volcanic glass material used as a soil amendment to improve drainage and aeration, and as an aggregate in insulating concrete and vermiculite plaster. Perlite added to potting mix improves drainage for plants.
Pavers with extra-wide joints filled with gravel, allowing water to infiltrate the soil below. Required in some jurisdictions to manage stormwater runoff.
Utility approval to energize a solar system after final inspections. Production credits begin only after PTO.
A government-issued authorization to perform construction, electrical, plumbing, or mechanical work. Permits trigger code inspections and protect homeowners. Unpermitted work can become an obstacle when selling a home.
Signs of pest infestation include droppings, gnaw marks, damaged wood, wing casings, and live or dead insects or rodents. Different pests require different treatment strategies — correct identification is the first step.
A professional evaluation identifying current and potential pest infestations including termites, rodents, wood-boring beetles, and ants. Required before many real estate transactions. Separate from a general home inspection.
A motion sensor designed to ignore pets under a defined weight. Look for 40-pound or 80-pound rated sensors; verify specs match your pet.
Cross-linked polyethylene pipe used for water supply lines. Flexible, freeze-resistant, and quick to install — PEX is the dominant supply piping material in new construction. Color-coded: red for hot, blue for cold.
Cross-linked polyethylene tubing made by the Engel method — most flexible, kink-resistant, and expandable. Top choice for residential potable water; used with expansion or crimp fittings.
Multilayer composite tubing (PEX/aluminum/PEX) used in radiant floor and snow-melt systems. Better oxygen barrier and less expansion than standard PEX; required by many boiler manufacturers.
Cross-linked polyethylene tubing made by the silane method — slightly stiffer than PEX-A and lower cost. Excellent for residential potable water with crimp or clamp fittings.
Cross-linked polyethylene made by the irradiation method — least common in U.S. residential. Uses standard crimp or clamp fittings; bend radius is tighter than PEX-A.
A marine-grade or industrial plywood with a phenolic resin overlay providing superior surface hardness, moisture resistance, and a smooth film finish. Used for concrete forms, countertop substrates, and flooring in wet environments.
A light-sensitive switch that turns outdoor fixtures on at dusk and off at dawn. Common on porch lights and post lamps. Modern LED-compatible photocells avoid lamp flicker.
The technology converting sunlight directly into electricity using semiconductor cells (silicon). Residential PV panels typically have 20–22% efficiency and produce 250–400 watts per panel at standard test conditions.
A traditional decorative fence with vertical pickets. Common heights 3–4 feet; defines property lines without blocking views.
Horizontal trim near ceiling height for hanging artwork on hooks. Common in pre-1940 homes; allows artwork swap-out without nail holes in plaster.
A large fixed (non-opening) window for views and light. Most efficient window type per dollar; pair with operable windows for ventilation.
A vertical structural support — concrete, wood, or masonry — that transfers loads from a beam or post into the soil below the frost line. Common in crawl spaces, decks, and pier-and-beam foundations.
A short jumper wire connected at a wire nut between three or more wires. Used to reduce the number of wires under any one screw terminal — required by best practices on shared neutrals.
A rubber-and-metal flashing collar that seals plumbing vent penetrations. The rubber gasket cracks in 10–15 years; replace with a lifetime model (Lifetime Tool, Perma-Boot) at reroofing.
A plumbing emergency where a pipe fails and releases water rapidly — from freeze damage, corrosion failure, joint failure, or excessive pressure. Immediately close the main water shut-off and call an emergency plumber.
A trenchless sewer-replacement method that pulls a new HDPE pipe through the existing line while a bursting head fractures the old pipe outward. Less excavation than full replacement.
A video inspection of drain and sewer pipes using a waterproof camera on a flexible cable. Reveals pipe condition, root intrusion, offsets, and clogs. Recommended before purchasing any home with cast iron or clay pipes.
A tool that cuts copper, PVC, and CPVC pipe with a clean, square cut using a rotating cutting wheel rather than a saw blade. Essential for clean soldering joints in copper pipe work.
Cured-in-place pipe lining — a felt liner saturated in epoxy is inverted into the existing pipe and cured to form a smooth new pipe within. Restores 50+ years of service life without digging up the yard.
The slope of a roof, expressed as rise over run — for example, a 6:12 pitch rises 6 inches for every 12 inches of horizontal run. Steeper pitches require more roofing material but shed water and snow more effectively.
Standard tangential cut producing cathedral grain patterns. Most economical and visually variable; the dominant cut for builder-grade hardwood floors.
A traditional white plaster pool finish. Resurface every 8–15 years; common in concrete (gunite) pools.
A traditional wall-finishing technique using lime, gypsum, or Portland cement plaster applied in multiple coats over metal lath or drywall. Provides exceptional fire resistance and sound attenuation. Rarely used in new construction.
The standard modern framing method where each floor level is built separately on the platform of the one below, with studs that span only one story. Provides built-in fire blocking at floor levels.
A pressurized air distribution chamber in an HVAC system. The supply plenum distributes conditioned air to branch ducts; the return plenum collects room air back to the air handler. Must be sealed to prevent duct leakage.
A weighted string tool used to transfer a point directly vertically — confirming a wall is perfectly plumb (vertical) or locating a point directly below an overhead reference. The oldest layout tool still in use.
The IPC (International Plumbing Code) or UPC (Uniform Plumbing Code) — standards governing pipe materials, drain slope, venting requirements, fixture installation, and water supply design. Required for all permitted plumbing work.
A permit required for new plumbing installations and modifications — adding bathrooms, moving drains, installing water heaters, and connecting irrigation systems. Required by code for all plumbing work beyond fixture replacement.
Smooth, dense cut-pile carpet — the most luxurious and formal style. Typically nylon for stain resistance; not ideal for high-traffic areas due to crush marks.
A structural panel made from cross-laminated wood veneers, stronger and more moisture-resistant than OSB for many applications. CDX plywood (exterior-grade) is used for sheathing; ACX for visible applications.
A cabinet box made of plywood vs. particleboard. More durable, water-resistant, and screws hold better. Premium spec on midrange and luxury cabinets.
Traditional roof decking; more durable when wet than OSB and easier to refasten. CDX grade is standard for residential roofs.
Structural plywood panels (CDX grade) nailed to roof rafters or trusses as the base for roofing materials. 1/2" for rafters at 24" o.c.; 5/8" for 24" spacing with heavy tile roofing. Still preferred over OSB in high-humidity regions.
Insurance required by lenders when a buyer's down payment is less than 20%, protecting the lender against default. PMI adds 0.5–1.5% of the loan amount annually. Drops off when equity reaches 20% on conventional loans.
A door that slides into a cavity inside the wall rather than swinging into the room — maximizing space in tight areas. Requires a thicker wall cavity or a built-in pocket door frame kit. Harder to insulate against sound than hinged doors.
A security camera powered by Ethernet cable (Power Over Ethernet). Cleaner installation than separate power; standard for hardwired security systems.
A targeted repair to a specific section of a pipe, foundation, or surface rather than full replacement. Common in drain line repair — trenchless point repair can fix a 3–6 foot damaged section for less than full replacement.
A diamond-grinding process that creates a polished, gloss-finished concrete surface. Common in modern lofts and commercial; durable, low-maintenance, and reflective.
Natural stone with a high-gloss reflective finish. Most formal look but slippery when wet and shows etching from acidic spills.
A garden designed to attract bees, butterflies, and hummingbirds. Uses native flowering plants, water features, and avoids pesticides.
A premium garage-floor coating that cures faster and is more UV-stable than epoxy. Higher cost; popular with professional installers offering one-day garage floor coatings.
A failed plastic pipe used 1978–1995 that fails catastrophically over time. Recognizable by its gray color. Insurance carriers commonly require full replacement before issuing or renewing policies.
A solar panel made from multi-crystal silicon. Lower efficiency (15–17%) but lower cost. Less common in residential as efficiency gap with mono closes.
A budget carpet fiber resistant to stains but more prone to crushing. Improved by triexta (SmartStrand) variants offering nylon-like resilience at lower cost.
Polyisocyanurate foam board with foil facers. R-6 to R-7 per inch when warm; performance drops below freezing. Most common roof insulation in commercial and high-end residential.
Slab jacking using polyurethane foam injection instead of mud-grout. Lighter, faster-curing, and waterproof; premium pricing over traditional mud-jacking.
Oil-based or water-based clear coating applied during site-finishing. Oil-based ambers over time; water-based stays clear and dries faster with low odor.
A two-component expanding foam used for sealing gaps and cracks (low-expansion spray), structural reinforcement, and as roofing insulation (SPF). Spray polyurethane foam (SPF) provides high R-value and air sealing simultaneously.
A controller managing pumps, heaters, lights, and chemistry (Pentair IntelliConnect, Hayward OmniLogic). Allows mobile control of pool from phone.
Pool calcium: 200–400 ppm. Low calcium etches plaster and equipment; high calcium causes scale. Adjust upward with calcium chloride.
The total water volume of a swimming pool measured in gallons, used to calculate chemical doses and pump sizing. Multiply length × width × average depth × 7.48 for rectangular pools. Round or irregular pools require different formulas.
Chlorine in liquid, tablet, or granular form. Maintain free chlorine 1–4 ppm; 3 ppm typical. Adjust with stabilizer (cyanuric acid) for outdoor pools.
A bubble-wrap-style cover that captures solar heat and reduces evaporation. Increases water temperature 8–15°F; cuts heating costs and water loss.
A safety barrier required by code in most states around residential swimming pools. Minimum height: 4 feet; self-closing, self-latching gate. Prevents unsupervised child access — drowning is the leading cause of unintentional injury death in children under 5.
Local pool-fence regulations including minimum height (typically 48 inches), self-closing/self-latching gates, and gap limits. Strictly enforced for child safety.
Sand (largest particles, easiest care, lowest filtration), cartridge (mid-tier, no backwash), DE (finest filtration, requires backwash and DE recharge).
An appliance that raises pool water temperature — available as gas (fastest heating), heat pump (most efficient), electric resistance, and solar. Gas heaters can raise large pools 1°F per hour; heat pumps average 1–2°F per hour.
A natural gas or propane pool heater. Heats fast; high gas consumption when running. Best for occasional pool warming, not continuous use.
An electric heat pump pulling warmth from outdoor air. 4–5x more efficient than gas heaters; 30+ year life. Cost more upfront but lower operating expense.
A vinyl liner inside a pool shell. Replace every 8–12 years at $3,000–$5,000. The dominant cost-effective in-ground pool surface.
A bottom-mounted pool drain. Modern dual main drains required by federal Virginia Graeme Baker Act to prevent suction entrapment.
Pool pH should be 7.4–7.6. Low pH is corrosive; high pH causes scale and reduces chlorine effectiveness. Adjust with muriatic acid (lower) or soda ash (raise).
The interior surface finish of a concrete swimming pool — typically white Portland cement with marble aggregate. Replaster every 7–10 years. Pebble finishes (Pebble Tec) last 15–20 years and provide a more luxurious appearance.
The motor-driven centrifugal pump that circulates pool water through the filter system. Variable-speed pumps use 75% less energy than single-speed — the EPA requires VS pumps in all new pool installations.
A heavy-duty winter pool cover anchored to the deck. Holds 4,000+ pounds (people/animals) per ASTM standards; required for closing pools in cold climates.
Granular calcium hypochlorite or sodium hypochlorite (liquid) used for periodic high-dose chlorination. Kill algae blooms and break combined chlorine.
A surface-mounted intake collecting floating debris before it sinks. 1–2 skimmers per pool; check and empty weekly during use.
Black plastic solar collectors heating pool water via the existing pump. Free heat in summer; extends swim season 2–3 months in moderate climates.
Cyanuric acid extending chlorine life in sunlight. Maintain 30–50 ppm in salt pools, 50–100 ppm in chlorinated pools. High CYA reduces chlorine effectiveness.
Pool TA: 80–120 ppm. Acts as a pH buffer. Adjust with sodium bicarbonate (raise) or muriatic acid (lower).
A textured ceiling finish applied by spray — popular from 1950–1985. May contain asbestos if installed before 1978. Test before removal. Removal costs $1–$2/sq ft professionally; scraping generates a significant mess.
Tile fired at higher temperatures than ceramic, resulting in lower water absorption (<0.5%) and higher density. Suitable for outdoor and freezing climates.
A self-contained AC unit on casters that exhausts hot air through a flexible duct to a window. Less efficient than window units due to mixing of indoor/outdoor air. Use only for emergencies or rentals.
A wheeled gasoline, propane, or dual-fuel generator (3,000–12,000W) that connects via cords or a transfer switch. CO poisoning risk — never operate indoors or in attached garages.
The hydraulic cement that binds aggregates in standard concrete. Type I/II is general-purpose residential; Type V is sulfate-resistant for high-sulfate soils.
The most common cement type used in residential concrete mixes, mortar, and stucco. Combined with aggregates and water in specific ratios to achieve desired compressive strength (measured in PSI at 28 days).
Waterproofing applied to the exterior of a foundation wall, stopping water before it contacts the structure. The most effective approach — requires excavation but prevents hydrostatic pressure from building against the wall.
A metal connector anchoring a wood post to a concrete footing that holds the post end above the concrete surface, preventing moisture contact and rot. Required by code for all exterior decking posts.
A structural system using large timber posts and horizontal beams to carry loads, with minimal load-bearing walls. Often combined with structural insulated panels (SIPs). Allows large open floor plans with fewer columns.
Weed killer applied after weeds are visible. Selective formulations target broadleaf weeds without killing grass; non-selective for paths and drives.
A short-duration voltage spike from lightning, utility switching, or grid faults. Whole-house surge protectors clamp these spikes; point-of-use surge strips protect sensitive electronics downstream.
A motor-driven pump that delivers high-pressure water (1,500–4,000 PSI) for exterior cleaning of concrete, siding, decks, fences, and driveways. Gas models provide more pressure and mobility than electric units.
Using a high-pressure washer (2,000–3,500 PSI) to clean concrete driveways, patios, pool decks, and walkways. Removes staining, moss, and mildew. Follow with a concrete sealer application to protect the cleaned surface.
A gas water heater that uses an electric blower to push exhaust gases out through PVC piping. Allows installation where natural draft venting isn't practical, such as basements with no chimney.
An impressed-current anode rod that uses a small electrical current to protect the tank instead of corroding. Lasts 20+ years; useful in sulfur-water areas where standard anodes cause rotten-egg odor.
Tesla's residential battery system — 13.5 kWh per unit. Stack up to 10 for whole-home backup. Required Tesla Solar Inverter for new installs.
A meeting with planning or building department staff before submitting permit applications — used to identify requirements, potential issues, and required documentation for complex or unusual projects.
A lender's conditional commitment to provide a specific loan amount based on verified income, assets, and credit. Stronger than pre-qualification — required by most sellers before accepting an offer in competitive markets.
Weed control applied before weed seeds germinate. Crabgrass timing is critical — apply when soil temperatures reach 50–55°F (forsythia bloom).
A door pre-installed in its jamb at the factory or dealer. Faster installation than slab doors; standard for new construction.
Narrow fixed glass panels flanking an entry door. Adds light to foyer; more expensive door units due to the additional glass and frame structure.
Factory-finished hardwood with cured aluminum-oxide UV finish. Tougher than site-finished; visible bevels between planks; 25-year wear warranty common.
A valve that lowers incoming city water pressure to a safe range (50–80 PSI). Required in most jurisdictions when street pressure exceeds 80 PSI. Prevents banging pipes and appliance damage.
Generic term for any valve that limits downstream pressure. Shorthand for the PRV at the meter or main shut-off in residential plumbing.
A regulator dropping irrigation supply pressure to drip-system 25 PSI. Required on every drip zone for proper emitter function.
A safety device on water heaters and boilers that opens automatically to release excess pressure. Required by code — if a PRV is dripping constantly, the water heater is overheating and the PRV needs replacement.
A safety switch that confirms inducer fan airflow before allowing gas valve operation. Fails when condensate traps clog or vent pipes are blocked, locking out the furnace as a CO safety measure.
An older defrost-initiation method using a refrigerant-pressure switch to detect coil frost. Less precise than demand defrost; common in budget heat pumps.
A safety test performed on gas piping systems to verify there are no leaks before commissioning. Gas lines are pressurized and monitored for pressure drop. Required by code when installing new gas piping.
Charging a refrigerant circuit with dry nitrogen to 300–500 PSIG and checking for leaks before evacuation. A holding pressure for 15+ minutes confirms all brazed joints and flares are leak-free.
Cleaning exterior surfaces using a high-pressure water stream, measured in PSI (pounds per square inch) and GPM (gallons per minute). Use 1,500–3,000 PSI for concrete; 1,000–1,500 PSI for softer surfaces like wood decking.
Cleaning siding with a pressure washer before painting. Removes loose chalk, mildew, and dirt; let surfaces fully dry (typically 24–48 hours) before painting.
A toilet with a sealed inner tank that uses water-line pressure to power a forceful flush. Loud but high MaP scores; favored in commercial bathrooms and homes with frequent clogging.
A shower valve that maintains constant temperature by adjusting hot/cold ratio when pressure changes (someone flushes a toilet). The most common modern shower valve type.
Wood impregnated with preservatives to resist rot, insects, and moisture. Required for all exterior wood in contact with the ground, concrete, or within 6" of grade. Modern treatment is ACQ or copper azole (CA-C), not the old CCA formula.
Southern yellow pine lumber treated with copper azole (CA-C) or ACQ preservative for outdoor use. Required for all wood in contact with soil, concrete, or within 6" of grade. The standard material for deck framing.
A preparatory coating applied before paint or finish to improve adhesion, provide stain-blocking, and create a uniform surface. Using the right primer for the substrate (wood, drywall, masonry, metal) is critical for paint durability.
A fence designed to block sight lines. Common heights: 6 feet front yard maximum, 8 feet rear depending on jurisdiction.
A warranty where coverage decreases over time. Typical roofing material warranties are full coverage for the first 5–10 years and pro-rated thereafter.
A thermostat with weekday/weekend or 7-day schedules that adjusts setpoints automatically. ENERGY STAR estimates $180/year savings vs. fixed setpoints, with no smart features required.
An annual tax levied by local governments on property ownership — typically 0.5–2.5% of assessed value annually. Property taxes fund local schools, roads, and government services. Appeals are possible if the assessment exceeds market value.
A copper or stainless fitting joined by a hydraulic press tool, eliminating open flame. Used widely in commercial and increasingly in residential remodels for safety and speed.
The selective removal of plant branches and stems to improve structure, promote health, control size, and improve flowering. Timing varies by species — most flowering shrubs should be pruned immediately after blooming.
Permanent Split Capacitor motor — an older, single-speed AC motor design used in budget HVAC equipment. Less efficient than ECM motors but simpler and cheaper to replace.
The compressive strength of concrete measured in pounds per square inch at 28 days. Residential footings typically specify 3,000 PSI; driveways 4,000 PSI; structural elements may require 5,000 PSI or more.
Engineered lumber from oriented wood strands. Stronger than LVL; used for heavy beams and posts. Brand name: Parallam.
Packaged Terminal Air Conditioner — a wall-sleeve through-wall AC and heater used in hotels, apartments, and additions. Standard sleeve sizes (16"H × 42"W) allow swap-out without re-framing.
An enclosure used as a pull point in long conduit runs to ease wire pulling. Sized larger than standard junction boxes; required wherever a 360° angle change occurs in a conduit run.
A chain-operated switch on ceiling fans, lights, and bath fans. When a ceiling fan wobbles or makes noise, check the pull chain weight — unbalanced blades and loose fixtures are more common causes.
A kitchen faucet with a pull-down sprayer integrated into the spout. Most popular kitchen-faucet style; magnetic dock prevents drooping over time.
A kitchen faucet with a separate spray head that pulls out from the spout horizontally. Older style than pull-down but still common in compact and industrial-look kitchens.
A tall narrow base cabinet with full-extension shelves. Great for tight spaces; typical 9–12 inch cabinet width.
A shelf installed on full-extension drawer slides in a base cabinet, making contents accessible without kneeling or reaching far back. One of the most popular and practical cabinet upgrade options.
A built-in pullout trash and recycling unit inside a base cabinet. Modern kitchen standard; sized 15-, 18-, or 21-inch base cabinets.
A list of incomplete or deficient items that must be corrected before final payment. Walk through the completed project with your contractor and document everything in writing. Don't release final payment until all items are resolved.
A steel hydraulic-driven pile installed under foundations to bedrock or load-bearing strata. Common in expansive-clay regions for foundation stabilization.
A fitting (SharkBite, ProBite) that grips PEX, copper, or CPVC by pushing the tube in. Convenient for repairs but more expensive than crimp fittings; allowed in walls per most codes.
An obsolete electrical panel brand using push-button breakers. Replacement parts are scarce and expensive; many electricians recommend full panel upgrade rather than spot repairs.
An artificial-turf backyard putting green. Drainage layer below; specialty turf above. Maintenance-free vs. natural grass.
Polyvinyl Acetate primer for new drywall. Seals porous gypsum and joint compound for a uniform topcoat. Inexpensive but doesn't hide stains — use a dedicated stain blocker for those.
Polyvinyl chloride drain-waste-vent pipe. White; the dominant residential drainage pipe across the U.S. since 2000. Cement-welded with primer + cement; never mix with ABS solvent.
Polyvinyl chloride pipe used for drain, waste, and vent lines. Lightweight, corrosion-free, and easy to cut and glue. CPVC (chlorinated PVC) is rated for hot water supply lines. Not suitable for hot water above 140°F.
A heat-welded thermoplastic single-ply membrane known for chemical resistance and longevity. More expensive than TPO; common on commercial restaurant roofs where grease exposure occurs.
A 40-mil flexible PVC sheet installed under a mud-bed shower pan to catch water that penetrates the tile and grout. Mortar bed slopes the water back to weep holes in the drain.
Exterior trim boards made from polyvinyl chloride — marketed under brand names including Azek, Versatex, and Kleer. Rot-proof, insect-proof, and dimensionally stable. Glued and nailed like wood.
A 4-circuit breaker in a 2-slot footprint, with two 240V circuits or a mix. Common in space-constrained panels but requires panel-listing verification.
Unglazed ceramic tile, typically red, used for durable flooring in high-traffic areas. More absorbent than porcelain — seal before use in wet areas. Common in commercial kitchens and entryways.
An unglazed, dense, slip-resistant ceramic tile commonly used in commercial kitchens, mudrooms, and utility areas. Highly durable but porous without sealing — seal annually to prevent staining in food service areas.
A small molding with a quarter-circle profile, used at floor-baseboard junctions. Hides gaps between baseboards and uneven flooring.
Lumber cut radially from the log, producing straight grain and excellent dimensional stability. Premium pricing; favored in fine furniture and Mission-style flooring.
A countertop material made from 90–93% ground quartz bound with resin, available in consistent patterns and colors. Non-porous — never needs sealing. More resistant to staining than natural stone but sensitive to high heat.
An engineered stone countertop made of 90% crushed quartz with polymer resin. Non-porous, stain-resistant, no-sealing required. The dominant kitchen counter material since 2018.
A natural metamorphic stone formed from sandstone, extremely hard and durable for countertops and flooring. Often confused with quartz countertops (engineered) — quartzite is all-natural and requires sealing.
A natural stone harder than granite and rivaling quartz in performance. Premium pricing; combines marble-like veining with granite-like durability.
A self-sealing refrigerant coupling pre-charged at the factory. Allows DIY mini-split installation without specialized tools — but professional evacuation is still recommended for warranty compliance.
An ozone-depleting HCFC refrigerant phased out by the EPA in 2020. Existing R-22 systems can still be serviced with reclaimed refrigerant, but replacement is usually more cost-effective than recharging.
A single-component A2L refrigerant with ~68% lower GWP than R-410A. Common in mini-split and VRF systems. Mildly flammable, so installers must follow A2L charge-limit and leak-detection codes.
A hydrofluorocarbon refrigerant blend (HFC) used in residential AC and heat pumps from 2010–2024. Operates at higher pressures than R-22 and is being phased down by the EPA in favor of lower-GWP alternatives.
A next-generation A2L refrigerant with ~78% lower global-warming potential than R-410A. Required in most new residential HVAC equipment manufactured for sale in the U.S. starting January 1, 2025.
Resistance to heat flow. Higher R-value = better insulation. Recommended attic R-values: R-30 in southern climates, R-49 in northern, R-60 in Alaska and northern Maine.
The minimum insulation R-value specified by energy code for various building assemblies — attic, wall, floor, and foundation insulation. Requirements depend on climate zone and building type.
A reflective foil installed on the underside of the roof deck or attic floor. Reduces summer cooling loads in hot climates; minimal benefit in cold-dominated climates.
Heating delivered by warm water tubing or electric mats embedded in the floor. Most comfortable form of heating because surfaces (not air) carry the warmth. Best with tile or stone floor finishes.
A heating system that warms surfaces (floors, walls, or ceilings) rather than heating air. In-floor radiant heat — hydronic or electric — provides extremely comfortable warmth with no drafts or noise.
Flooring approved for installation over in-floor radiant heating systems. LVP (SPC core), engineered hardwood, and tile are radiant-compatible. Most solid hardwood and laminate products are not recommended.
A naturally occurring radioactive gas that enters homes through soil and foundation cracks. The leading cause of lung cancer in non-smokers — responsible for 21,000 deaths per year in the U.S. EPA recommends mitigation when levels exceed 4 pCi/L.
A sub-slab depressurization system that uses a PVC pipe and fan to draw radon from beneath the slab and vent it above the roofline. Reduces radon levels by 99%. Costs $800–$2,500 installed.
A sloped framing member forming the structural skeleton of a roof. Rafters rest on the wall top plate at the eave and meet at the ridge board at the peak. Engineered roof trusses replace individual rafters in most new construction.
The portion of a roof rafter that extends past the wall to form the eave overhang. Repair when sagging or rotted before reroofing.
A depressed planting bed designed to capture and infiltrate roof and lawn runoff. Reduces stormwater pollution; eligible for utility credits in some cities.
A device that interrupts irrigation when rainfall exceeds a setpoint. Required by code in many jurisdictions; saves water and prevents disease from over-watering.
A large 8–16 inch round or square showerhead mounted from the ceiling for a soft, drenching spray. Flow drops noticeably below 50 PSI water pressure.
A traditional cabinet door with a raised center panel and profiled frame. Formal look; common in traditional and transitional kitchens.
The sloped edge of a gable roof that runs from eave to ridge. Rake trim and drip edge protect the gable ends.
The sloped edge of a gable roof at the triangular end wall. Rake shingles must be properly nailed and sealed — lifted rake shingles are a major entry point for water and the most common wind damage failure mode.
Drip edge along the gable end of a roof. Less critical for water than eave flashing but required by code in most jurisdictions for a clean, finished appearance.
A ventilation appliance above a cooking surface that exhausts cooking fumes, smoke, and moisture. CFM (cubic feet per minute) rating should equal 100× the cooktop BTUs divided by 100 for gas ranges. Exterior exhaust is required for gas ranges.
Cubic feet per minute of air a kitchen exhaust hood removes. Code minimum is 100 CFM intermittent or 25 CFM continuous; 400+ CFM is needed for high-output gas ranges and serious cooking.
An NEC-required solar safety system that de-energizes panels within 30 seconds for firefighter safety. Achieved with module-level rapid-shutdown devices (MLPE).
A seller's legal obligation to disclose known material defects — leaks, mold, pests, structural issues, and encroachments — to prospective buyers. Non-disclosure can result in post-closing litigation.
Land and all permanently attached improvements — buildings, structures, and fixtures. Distinct from personal property (furniture, appliances) which may be included or excluded from a real estate sale.
Steel reinforcing bar embedded in concrete to add tensile strength and control cracking. Rebar size (#3 through #11) and spacing are specified by engineers. Essential in footings, walls, and driveways subject to heavy loads.
An engineer-specified pattern of reinforcing steel for foundations, slabs, and walls. Common residential: #4 rebar at 12" or 16" centers in slab grids.
A storage vessel between the condenser and metering device that holds excess refrigerant during low-load periods. More common in commercial refrigeration than residential AC.
A 3-prong plug-in device with indicator lights that identifies wiring faults — open ground, reverse polarity, hot-neutral reverse. A $10 tool every homeowner should own.
A ceiling-recessed lighting fixture installed in a metal housing above the ceiling. Older incandescent cans are inefficient; modern LED retrofit kits or canless wafers are 75% more efficient.
Also called can lights or downlights — fixtures installed flush within the ceiling surface with only the trim ring visible. LED recessed lights last 25,000+ hours. Air-seal all recessed lights in insulated ceilings to prevent heat loss.
A piston-driven compressor design largely retired from residential use but still found in commercial refrigeration and pre-2000 home AC systems. More vibration and noise than scroll compressors.
A demolition saw using a back-and-forth blade motion — ideal for rough cutting of framing, demo work, pipe cutting, and drywall. Also called a Sawzall (Milwaukee brand name). Long blades reach into walls and ceilings.
A ductless range hood that filters and returns air to the kitchen instead of venting outside. Removes grease and some odors but does not remove moisture or combustion byproducts. Less effective than ducted.
A small pump that circulates hot water through the supply piping so it's instantly hot at the tap. Saves water; costs roughly $50–$120/year in extra electric and water-heating energy.
A naturally rot-resistant western U.S. lumber used for exterior decking, siding, and garden structures. More expensive than pressure-treated pine but preferred for its aesthetics and chemical-free rot resistance. Availability has decreased significantly.
Sanding hardwood floors to remove the finish and any surface scratches, then applying new stain (optional) and polyurethane finish. Costs $3–$8/sq ft and renews floors that solid or thick-engineered hardwood allow.
A foil-and-bubble-wrap product marketed for insulation. Performs well as radiant barrier in some applications but typically over-rated as bulk insulation.
The amount of refrigerant in an HVAC system. Incorrect charge (too much or too little) reduces efficiency and can damage the compressor. Only EPA 608-certified technicians may handle refrigerants.
The motor that circulates refrigerant to maintain cold temperatures. Compressor failure is the most expensive refrigerator repair — replacement costs $700–$1,500+. On units over 10 years old, replacement of the appliance is more cost-effective.
Refinishing a worn or stained bathtub, tile surround, or sink with a new spray-applied coating to restore its appearance without full replacement. Professional reglaze costs $300–$700 and lasts 5–15 years with proper care.
A horizontal slot in a brick or stucco wall designed to accept counter flashing. Provides a clean and reliable termination for roof-to-wall water management.
A wireless temperature/occupancy sensor placed in a problem room. Lets the thermostat balance HVAC operation across multiple zones using sensor averages or follow-me logic.
Large specialized tools available from equipment rental companies — concrete saws, plate compactors, trenchers, lift equipment, scaffolding, and air compressors. Renting is cost-effective for one-time use tools.
The cost to rebuild or reconstruct a structure at current labor and material prices — used to set homeowner's insurance coverage levels. Replacement cost is often higher than market value, especially for older homes.
A flange-less window sized to fit inside an existing frame. Limited to insert installations; the frame fits within the original frame opening.
Removing deteriorated mortar from masonry joints and replacing with fresh mortar to restore weather resistance and structural integrity. Failing mortar allows water infiltration that damages brick and blocks.
A wall holding back soil to create level grades or terraces. Above 4 feet typically requires engineering and permits. Common types: poured concrete, segmental block, timber, stone.
A point-of-use filter that removes 95–99% of dissolved solids using a semipermeable membrane. Typically installed under the kitchen sink with a dedicated faucet; rejects 3–4 gallons per gallon produced.
A four-way solenoid valve in heat pumps that reverses refrigerant flow to switch between heating and cooling modes. A stuck reversing valve causes a heat pump to cool when calling for heat or vice versa.
A formal written request from a contractor to the architect, engineer, or owner seeking clarification on drawings, specifications, or site conditions. Unanswered RFIs can justify change orders and schedule claims.
A document soliciting contractor bids that includes the project scope, specifications, timeline, and selection criteria. A well-prepared RFP results in more accurate and comparable bids.
A major HVAC and water heater manufacturer offering heat pumps, gas furnaces, and hot water heaters across a broad price range. The Rheem ProTerra heat pump water heater qualifies for the 30% federal tax credit.
The horizontal peak where two roof slopes meet. Ridge cap shingles or ridge vent provide the transition from one slope to the other.
The horizontal framing member at the peak of a gable roof to which rafter ends are attached. A structural ridge beam carries load; a non-structural ridge board is a nailer only. Distinguish these before modifying an attic.
Specially formed asphalt shingles designed for installation at the ridge and hip lines of a roof. Standard asphalt shingles can be cut for ridge caps on budget projects but purpose-made hip-and-ridge products provide superior performance.
A continuous exhaust vent along the roof peak that lets hot attic air escape. The most effective passive attic ventilation when paired with proportional soffit intake. Typically $7–$12 per linear foot installed.
Lumber cut at a slight angle to the radius, producing straight grain without the medullary rays of quarter-sawn. Maximizes stability with minimal yield.
A consumer protection right allowing cancellation of certain home improvement contracts within 3 business days of signing. Applies to contracts signed at home for projects over $25 — mandated by the Federal Truth in Lending Act.
A strip of land the public or a utility company has the right to use — typically along roads and for utility lines. Verify setbacks from rights-of-way before placing any permanent structure.
EPS, XPS, or polyiso foam boards used for foundation, exterior walls, and roof insulation. R-4 to R-7 per inch; provides continuous insulation that breaks thermal bridges.
Heavy-wall threaded steel conduit. Used for service entrance, riser, and outdoor exposed wiring. Most physically protective conduit type allowed in residential code.
The perimeter joist that caps the ends of floor joists at the foundation level. A common source of air infiltration in older homes — insulating and air-sealing rim joists is one of the highest-ROI energy improvements.
A layer of large stones placed along slopes, stream banks, and shorelines to control erosion. More durable than mulch and plants for steep slopes — used at the base of retaining walls and along drainage swales.
A layer of large stones or concrete rubble used to control erosion at the base of slopes, stream banks, and shorelines. Commonly used to protect the base of retaining walls and foundation walls near water.
Elimination of mice and rats using traps, bait stations, and exclusion. House mice can enter through gaps as small as 1/4"; rats need only 1/2". Seal all entry points before baiting to prevent rodents from dying inside walls.
In home improvement, the percentage of renovation cost recovered in increased home value at sale. Kitchen remodels return 60–80%; bath remodels 55–70%; deck additions 65–75%; curb appeal projects up to 100%.
A low-cost mineral-surfaced asphalt roofing product sold in rolls, used on low-slope and agricultural structures. Lifespan of 5–10 years. Not suitable for residential roofing with pitch above 1:12.
The orange-peel texture left by paint rollers. Larger nap rollers (3/8"–1/2") produce coarser stipple; foam rollers leave finer texture for trim and cabinets.
A safety switch above each burner that detects flame rollout (flames escaping the heat exchanger). Trips on cracked heat exchangers or blocked flues — never bypass; this is a CO safety device.
Generic name for non-metallic sheathed cable, technically a Southwire trademark. Universally understood in the trade for residential branch-circuit wiring.
An elastomeric or silicone roof topcoat that extends the life of low-slope roofs by 10–15 years. Reflective coatings double as cool-roof solutions.
The structural sheathing layer (typically 1/2" or 5/8" plywood or OSB) that supports the roofing materials. Replace any soft or rotted decking during reroof.
A weatherproof roof access door, typically with built-in flashing and hardware. Common on commercial and modern residential flat roofs with rooftop decks.
Self-regulating heat cable installed in zigzag and gutter loops to maintain drainage paths during ice-dam conditions. Plug into outdoor GFCI; typical operating cost $0.50–$2 per day.
A written contractor or inspector evaluation of roof condition, remaining life, and recommended repairs. Required by some insurers for renewal on roofs older than 15–20 years.
Water entering through the roof system — most commonly at flashing, valleys, deteriorated shingles, or pipe penetrations. Find the attic entry point; trace upslope from the interior stain to find the exterior source.
The flashed bolts attaching solar racking to roof rafters. Properly flashed penetrations don't leak; sealant-only attachments fail in 5–10 years.
The slope of a roof expressed as rise over 12-inch run. 4/12 is the minimum for asphalt shingles per code; below 4/12 requires special low-slope underlayment.
Cleaning, repairing, and coating an existing roof to extend life — vs. full replacement. Tax classification: maintenance expense rather than capital improvement.
Code-required nail pattern: 6" spacing on edges, 12" on field for standard 8d nails. High-wind zones require closer spacing — verify local code.
A unit of roofing coverage equal to 100 square feet. A 2,000 sq ft roof with a 6:12 pitch has approximately 22–24 squares when accounting for slope factor. Use to estimate material quantities and compare contractor bids.
An extended manufacturer warranty requiring all components be from the same brand. Covers labor and tear-off (Golden Pledge, SureStart PLUS, Platinum Protection) — much stronger than basic material warranty.
An engineered triangular framing assembly forming the roof structure. Spans further than rafters; requires factory engineering and proper handling during install.
A traction surface near rooftop equipment to prevent membrane damage from foot traffic. Common on commercial roofs; recommended near chimneys and skylights on residential single-ply roofs.
Installing new shingles directly over the existing layer without tear-off. Cheaper but adds weight, hides deck issues, and shortens the new roof's life.
A bracket or fence on a metal or slate roof that prevents large snow slides. Required at entrances, walkways, and over heat-pump units in snowy regions.
A factor applied to a home's footprint to estimate roof area based on pitch. 4/12 ≈ 1.05; 6/12 ≈ 1.12; 8/12 ≈ 1.20; 12/12 ≈ 1.41. Used in DIY estimating.
A flail-style cutter on a sewer-cable machine designed to chew through tree-root intrusions. A temporary fix — root growth returns in 1–3 years; consider trenchless pipe lining for permanent solutions.
A small, efficient compressor using a rolling piston in a cylinder. Common in mini-split, window, and portable AC units up to 3 tons. Quieter than reciprocating compressors but lower capacity ranges.
An irrigation head that rotates while spraying. Better water distribution than fixed sprays; standard for lawn irrigation systems.
The framed opening in a wall that accommodates a window or door unit plus 1/2" of space on each side for shims and adjustment. Rough openings are 2" larger than the stated window size to allow proper installation.
Standard rough openings are 2" wider than the door width and 2-1/2" taller than the door height — for example, a 2/0 × 6/8 (24"×80") door requires a 26"×82-1/2" rough opening. Window rough openings match the window's rough opening specification printed on the label.
The installation of concealed plumbing, electrical, and mechanical components before walls are closed. Rough-in dimensions — outlet heights, drain locations, supply stubs — must match the fixtures being installed.
The distance from the finished wall to the center of the closet flange — typically 12 inches in modern construction, 10" or 14" in older homes. Always confirm before ordering a toilet.
The unfinished plumbing valve installed during framing, before drywall. Cap with a test plug for pressure testing; trim is added after tile and finish work.
Installing the drain, waste, vent, and supply pipes in their final positions before walls are closed. Rough-in dimensions must match the fixtures — toilet rough-in is typically 12" from the finished wall to the drain centerline.
A shallow round box for ceiling fixtures where joist depth doesn't allow a standard box. Limited box-fill capacity — code-compliant for light fixtures only, not fans.
A high-speed rotary tool for shaping wood edges, cutting grooves (dadoes and rabbets), and making decorative moldings. Handheld routers accept interchangeable bits for different profiles and operations.
A capacitor that provides continuous phase shift to the run winding of a single-phase compressor or motor. Bulged, leaking, or weak run capacitors are the #1 cause of no-cooling service calls in summer.
A toilet that continuously runs water between flushes, wasting 200+ gallons per day. Most commonly caused by a worn flapper, failing fill valve, or float set too high. Inexpensive DIY repair in most cases.
An obsolete, code-banned drain trap shaped like an S. Self-siphoning empties the trap seal and allows sewer gas into the home. Replace any S-traps found in older homes during plumbing work.
Tempered or laminated glass required by code in hazardous locations — within 18" of floors, within 24" of doors, and in bathroom enclosures. Tempered glass shatters into small cubes rather than dangerous shards.
A gutter that slopes away from the house rather than toward the downspout, allowing water to overflow rather than drain. Caused by failed gutter hangers, improper original slope, or debris weight. Reseat hangers and re-slope.
An electrolytic cell generating chlorine from salted pool water. Replace cell every 5–7 years at $500–$1,000. Lifetime savings vs. liquid chlorine purchases.
A pool using a salt chlorine generator instead of liquid chlorine. Easier to maintain; gentler on skin; equipment cost $1,000–$2,500 over standard chlorine.
A pool filter using silica sand as the filter media. Largest particle size; backwash regularly. Cheapest pool filter to operate and maintain.
A latex caulk that hardens enough to sand smooth before painting. Used on cabinet seams and detailed trim where smoothness matters.
The grit progression for refinishing wood floors — typically 36 → 60 → 80 → 100 → 120 grit. Skipping grits leaves visible scratches in the final finish.
A natural sedimentary stone used for patios, walkways, and retaining walls. More porous than granite and limestone — requires sealing to prevent staining and freeze-thaw damage in cold climates.
A drainage fitting that joins a vertical drain to a horizontal one with a curved sweep. Distinct from straight tees, which are for vents only — never use a sanitary tee for vertical-to-horizontal drainage flow direction reversal.
The movable framing that holds the glass in a window unit. In a double-hung window, both the upper and lower sashes slide vertically. In a casement window, the sash swings outward on hinges.
Rope-and-pulley counterweight system on pre-1950 double-hung windows. Replace with new cord and pulleys to restore smooth operation in historic homes.
The latch on a hung or sliding window that locks the sashes together for security. Worn sash locks allow drafts; replace as a $5 upgrade.
A soft pearl-like sheen used in kitchens, bathrooms, and kids' rooms. Higher washability than eggshell; minor wall imperfections begin to show.
Smooth cut-pile carpet with a formal, plush appearance. Shows footprints and vacuum marks; best for low-traffic formal rooms.
Temporary work platforms allowing workers to access elevated areas safely. Tubular steel scaffolding is erected for multi-story painting, siding, and masonry projects. Never stand on the top rail of a ladder as a substitute.
Plumbing-code requirements limiting water at fixtures to 120°F. Achieved through pressure-balancing valves, thermostatic mixing valves at the heater, or both.
A long-angle joint splicing trim on long runs. Less visible than butt joints; standard for runs over 16 feet.
Standard-wall PVC conduit allowed for underground or above-grade exposed wiring. Cheaper and easier to install than metal; not allowed in plenums.
Heavy-wall PVC conduit required where physically exposed below 8 feet (driveway crossings, exterior walls). Much thicker walls than Schedule 40.
A polyethylene uncoupling membrane installed under tile to prevent crack transmission from subfloor movement. The premier option for tile over wood subfloors.
Metal trim systems (Schluter Jolly, Rondec, Quadec) for finishing tile edges and corners. Chrome, brass, satin, or matte finishes; matches modern fixture choices.
A spring-loaded service valve on refrigerant lines (same design as a tire valve) that allows gauge connection and refrigerant transfer. Common leak point — replace cores or caps with O-rings during service.
A maintenance refresh — light buffer sanding followed by a new coat of polyurethane. Extends the life of a hardwood floor 5–10 years before full refinishing.
An enclosed porch with screened walls providing bug protection while maintaining an open-air feel. Requires building permit and often HOA approval. Adding a screen porch returns 75–90% of cost in most markets.
A custom-fitted filler scribed to the wall contour. Used at the end of a cabinet run where the wall isn't perfectly straight.
A reliable, quiet compressor design using two interleaved spirals (one fixed, one orbiting) to compress refrigerant. The dominant design in modern residential AC and heat pumps. Lasts 15–20 years on average.
A drainage opening through a parapet wall or roof edge that allows water to exit a flat roof. Scuppers must be kept clear of debris — clogged scuppers can allow water ponding that overloads the roof structure.
A flexible compound used to fill gaps, joints, and cracks in buildings to prevent water and air infiltration. Silicone sealants bond to most surfaces and remain flexible for 20+ years. Use polyurethane for joints that require paintability.
A combustion appliance that draws combustion air from outdoors and exhausts directly outside, never mixing with indoor air. Required in modern tight homes for safety and IAQ.
Custom-formed aluminum gutters fabricated on-site to your home's exact length. Eliminates seams except at corners; the dominant residential gutter type since the 1990s.
A drip pan beneath an attic-mounted air handler that catches condensate when the primary drain clogs. Must drain to a conspicuous location (eave) so homeowners notice the leak before ceiling damage.
The condensing heat exchanger in 90%+ AFUE furnaces that captures latent heat from flue gases. Made of stainless steel or aluminum; manufacturer warranties typically run 10–20 years.
Pre-cut 10-foot gutter sections joined with sealant and brackets. DIY-friendly; more leak points than seamless gutters.
An impact-resistant clear film applied to window glass. Holds shattered glass together; deters smash-and-grab break-ins. 4–8 mil thickness common.
An exterior door hinge with non-removable pin or set-screw to prevent burglary by hinge-pin removal. Required on outward-swinging exterior doors in some jurisdictions.
A short vertical pipe below a gas appliance connection that captures debris before it enters the appliance valve. Required by code before gas furnaces, water heaters, and dryers. Also called a drip leg.
A short capped section of gas pipe at the bottom of a water heater or furnace that catches dirt and condensate before reaching the gas valve. Required by code on most gas appliances.
Seasonal Energy Efficiency Ratio — measures air conditioner cooling efficiency over a season. Higher is better. Minimum for new central AC units is SEER2 13.4 (South) or 14.3 (North). Top units reach SEER2 22+.
A modular concrete-block retaining wall (Allan Block, Versa-Lok, Pavestone). DIY-friendly up to 4 feet; engineered designs available for taller walls.
Designing breaker trip curves so only the breaker nearest a fault opens — keeping the rest of the system energized. Required in healthcare, emergency, and life-safety circuits.
Removing specific branches for safety, view, or air circulation while maintaining natural tree form. The proper alternative to topping.
A peel-and-stick rolled membrane that bonds to the deck without flame or adhesive. Faster and safer than torch-down for low-slope retrofits and residential additions.
A pourable cementitious mix that levels uneven subfloors. Necessary on concrete slabs with low spots over 3/16" in 10 feet for tile, hardwood, or LVP installs.
A pourable cementitious compound that flows into low spots and levels uneven concrete floors — essential before installing tile on out-of-level slabs. Achieves 1/8" tolerance in 10 feet needed for large-format tile.
A document provided by the seller listing known defects and issues with the property. Review carefully — sellers who knowingly omit material defects can be held liable for repair costs after closing.
A reflective finish for trim, doors, and high-moisture rooms. Most common trim sheen; shows brush strokes and surface flaws clearly — proper prep is critical.
A deck stain that adds color while still showing wood grain. Most popular type; reapply every 2–4 years on horizontal surfaces.
Heat that changes the temperature of air without changing its moisture content — what a thermostat measures. Roughly 70–80% of a home's cooling load on a hot dry day.
The fraction of an AC's total cooling capacity used for sensible cooling. Lower SHR (0.65–0.75) equipment removes more humidity — better suited to humid Gulf and Southeast climates.
A removable filter cartridge in the outlet baffle of a septic tank that prevents solids from reaching the drainfield. Inspect and rinse annually; vastly extends drainfield life.
Removing accumulated solids and scum from a septic tank — recommended every 3–5 years for typical residential use. Skipping pump-outs leads to solids reaching and clogging the drainfield.
An on-site wastewater treatment system using a buried tank and leach field. Common in rural areas without municipal sewer. Pump every 3–5 years to prevent field failure. Leach field failure costs $10,000–$30,000 to replace.
The liquid volume of a septic tank, typically 1,000 gallons for 3-bedroom homes and 1,250–1,500 for 4–5 bedroom. Sized by code based on bedroom count and daily flow.
A vertical extension that brings a buried septic-tank lid up to grade for easier inspection and pumping access. Required in most modern septic installs.
A control that staggers heat strip energization to prevent inrush current spikes. Each stage typically delays 30–60 seconds — protects breakers and limits utility demand impact.
A breaker and panel pair tested together at higher AIC than the breaker alone. Allows lower-cost breakers in higher-fault systems if the combo is UL-listed.
The overhead utility conductors from a pole transformer to a home's weatherhead. Typically aluminum triplex; minimum clearance 10 feet over walking surfaces, 12 feet over driveways.
Code-required minimum vertical clearance between overhead service conductors and surfaces — 10' over walking, 12' over residential driveways, 18' over public roads.
The point where utility power enters a building — comprising the service drop or lateral, service mast, meter base, and main disconnect. Code-defined boundary between utility-owned and homeowner-owned wiring.
Underground utility conductors from a pad-mount transformer or pole riser to a home's meter base. Standard in newer subdivisions and any community without overhead lines.
The vertical conduit pipe extending above the roof to the weatherhead. Must be rigid metal conduit with proper bracing — flimsy masts pulled by ice loads are a common service-call cause.
Replacing a 60–100 amp service panel with a 200 amp panel, including new meter base and service entrance conductors. Typical cost: $2,500–$5,500. Often required for EV chargers, heat pumps, or solar.
The minimum required distance from a property boundary, road centerline, or other reference point within which no structure may be built. Setbacks vary by zone and structure type — verify before designing an addition or deck.
A drywall mud that cures by chemical hydration in 20–90 minutes. Stronger than air-drying mud; ideal for first coat and patching.
The downward movement of a foundation as the soil beneath compresses or erodes. Uniform settlement may not cause structural problems; differential settlement (uneven sinking) causes cracks, sticking doors, and structural failure.
A high-flow grinder or solids-handling pump that lifts wastewater from below-grade fixtures up to the gravity sewer. Required for basement bathrooms, laundry rooms, and walkout suites.
A video inspection of the main sewer lateral from the home to the municipal main using a waterproof camera. Reveals root intrusion, pipe sag, cracking, and offset joints. Strongly recommended before purchasing any home over 20 years old.
A sulfurous odor in a home indicating sewer gas (hydrogen sulfide) escaping from the drain system. Caused by dry P-traps, failed wax ring seals on toilets, cracked drain pipes, or venting deficiencies.
The pipe from the home's sewer drain to the municipal main or septic tank. Most municipalities make the homeowner responsible for the lateral, including the section beneath the street.
The municipal sewer line in the street that lateral connections drain into. City crews maintain the main; homeowners maintain the lateral connecting to it.
A privacy fence with alternating boards on each side, producing partial views from oblique angles and full privacy from straight-on.
A cabinet style featuring a flat-panel door with a simple square frame — the most versatile and popular kitchen cabinet style. Works in traditional, transitional, and contemporary kitchen designs.
A simple flat-panel door with a square-edged frame. Versatile style fitting traditional through modern kitchens; the dominant cabinet door style of the past decade.
Slang for a backyard retreat shed designed as personal space. Trend evolved from man caves; often includes electrical, finished interior, windows.
A braced wall designed to resist lateral wind and seismic loads. Plywood or OSB sheathing with prescribed nail spacing and holdowns.
Structural panels — plywood or OSB — nailed to wall studs and roof rafters to provide rigidity, wind resistance, and a surface for exterior finishes. Required thickness depends on stud spacing and loads.
A single-slope roof common on additions and modern architecture. Easier and cheaper to frame than gable or hip roofs; trends with contemporary design.
Surface gloss level. Flat, matte, eggshell, satin, semi-gloss, and gloss — each balances scrub-ability against hiding wall imperfections. Higher sheen = easier to clean, more visible flaws.
A modern peel-and-stick or fabric-bonded membrane (Schluter Kerdi, Laticrete Hydroban) that waterproofs the entire shower envelope before tile. Requires dedicated drains compatible with the system.
The largest paint manufacturer in North America. Emerald (top tier) and Duration (mid-tier) are their best interior products. The Emerald exterior formula is one of the best exterior paints on the market for self-priming performance.
The fraction of solar heat that passes through a window. Lower SHGC reduces cooling load; higher SHGC harvests winter heat in cold climates. Match to your climate zone.
Small bumps in asphalt shingles caused by manufacturing defects or poor attic ventilation. Manufacturer claim if widespread within the warranty period.
Curling of shingle corners upward, caused by aging, poor ventilation, or moisture from below. A sign of a roof nearing replacement.
A gap at a shingle's lower edge that opens like a fish's mouth, caused by debonding or installation error. Allows water and wind under the shingle; seal with roofing cement or replace.
Installing new shingles over existing shingles without tear-off. Most codes allow only one lay-over (maximum two total layers). Lay-overs are less costly upfront but add weight, reduce wind resistance, and may void new material warranties.
Horizontal wood paneling with overlapping rabbeted edges. Originally a barn-siding profile; now common for modern farmhouse interior accent walls.
Adding a large dose of chlorine (or non-chlorine shock) to the pool to oxidize organic compounds, restore chlorine effectiveness, and clear cloudy water. Use 1 lb of calcium hypochlorite per 10,000 gallons as a starting point.
A small molding similar to quarter round but slightly taller and sleeker. Modern alternative to quarter round at floor-baseboard transitions.
When an AC, furnace, or heat pump turns on and off in rapid succession — typically less than 10 minutes per cycle. Caused by oversizing, dirty filters, or refrigerant problems. Hard on equipment and uncomfortable.
A real estate transaction where the seller's lender agrees to accept less than the outstanding mortgage balance. Properties often sell below market value and require significant repairs — inspection is especially important.
The body inside a shower wall containing the cartridge that mixes hot and cold water. Pressure-balancing or thermostatic — required by code in new construction to prevent scalds.
A waterproofed recessed shelf in a shower wall for shampoo and soap. Pre-formed pans (Schluter, KBRS) speed installation vs. site-built niches.
The waterproof base of a shower. Pre-formed acrylic and tile-ready pre-pitched pans (Schluter Kerdi, Wedi) replace traditional mortar-and-membrane construction in most modern remodels.
Shaping and sizing ornamental shrubs and hedges using manual or powered trimmers. Formal hedges require trimming 2–3 times per season; informal shrubs need less frequent shaping. Over-trimming reduces flowering.
A valve that stops water flow to a specific fixture or appliance. Angle stop valves under sinks and toilets allow service without cutting main water supply. Replace if handles are difficult to turn — a sign of internal corrosion.
Visible drawer slides on each side of a drawer box. Stronger than undermount for heavy drawers; standard on budget cabinets.
A narrow fixed window panel beside an entry door that adds light and architectural interest. Sidelites with glass extend from floor to near-ceiling; small sidelites flank the door at head height only.
A small viewing port in a refrigerant liquid line that lets a technician see whether refrigerant is flowing as solid liquid or with bubbles. Bubbles often indicate undercharge or restriction in the liquid line.
A flexible sealant that remains permanently flexible, withstands extreme temperatures, and is highly water-resistant. Ideal for bathroom joints, around fixtures, and exterior applications where movement is expected. Cannot be painted.
A long-life elastomeric coating with UV and ponding-water resistance. Premium choice for low-slope roof restoration; lasts 15–20 years before recoat.
Technically the exterior horizontal piece at the bottom of a window opening. Slopes outward to shed water; rotted sills are a leading cause of window replacement.
The horizontal wood member bolted to the top of a concrete foundation wall, providing the base for wall framing. Must be pressure-treated and separated from concrete by a sill gasket or termite shield.
Decorative grilles applied to both sides of an IGU with a spacer between panes. More authentic look than between-the-glass grilles; premium pricing.
A traditional fixed-speed pool pump. Restricted to specialty applications since 2021 federal mandate; common only in older systems.
A window where only the bottom sash slides up. Cheaper than double-hung; less ventilation flexibility. Common in production homes.
A compressor that runs only at full capacity (on/off cycling). Lowest equipment cost but shortest run cycles, weakest dehumidification, and highest electric-demand impact of the three compressor types.
A toilet flushing mechanism that uses a powerful water jet to create a siphon effect, pulling waste from the bowl. Modern siphon jet toilets achieve effective flushing with only 1.28 gallons per flush (GPF).
A new joist installed alongside an existing damaged or undersized joist. Common repair for sagging floors and notched joists from plumbing or HVAC work.
A scaled drawing showing the property layout including the structure, setbacks, easements, existing utilities, and proposed improvements. Required for permit applications involving new structures or significant grading.
Hardwood sanded and finished after installation. Allows custom stain and consistent surface; longer install time and dust exposure than prefinished.
Six fasteners per shingle (vs. four) — required for high-wind ratings on most architectural shingles. Adds nominal cost but significantly increases storm performance.
A thin layer of joint compound applied over the entire wall to smooth existing texture or repair extensive damage. Standard prep before high-end paint jobs.
A thin layer of joint compound across an entire wall surface. Used to smooth textured walls or achieve Level 5 finish for high-end paint jobs.
The surface-mounted opening with a floating weir door that skims debris from the pool surface before it sinks. Bags or baskets inside the skimmer trap leaves and debris — clean weekly or after heavy debris events.
A toilet with a smooth concealed trapway for easier cleaning. Premium aesthetic; typically $200–$500 more than non-skirted equivalents.
A roof window that admits natural light into interior spaces. Fixed skylights provide light only; venting skylights also provide ventilation. Solar-powered venting skylights qualify for the 30% federal tax credit.
A non-opening glazed roof opening that admits daylight. Tempered or laminated glass; flashing kit must match shingle vs. tile vs. metal roofing.
An opening skylight that vents hot air via solar or hand crank. Useful for natural cooling; rain-sensor models close automatically when storms approach.
Manufacturer-supplied step and head flashings designed for a specific skylight model and roofing material. Always use the kit; field-fabricated flashings are leak-prone.
A continuous slab (often matching countertop) extending up the wall. Modern, seamless look; eliminates grout lines; pricier than tile.
A flat door with no frame or paneling — pure flat surface. Modern, minimalist; shows wood grain or paint perfectly.
A door without a jamb. Cheaper than pre-hung but requires the existing jamb in good condition. Common for interior door swap-outs.
Rigid foam insulation around the perimeter of a slab edge. Required in many climate zones to reduce heat loss and floor cold-edge effect.
A monolithic concrete slab poured directly on the ground, serving as both the floor and foundation. Common in warm climates. Plumbing is embedded in the slab — leaks require saw-cutting for access.
Lifting settled concrete by injecting grout under it through small holes. Cheaper than replacement; works for sidewalks, driveways, and pool decks.
A concrete slab poured directly on prepared soil. The dominant first floor in slab homes; insulation, vapor barrier, and proper compaction are critical for long-term performance.
A blast-furnace byproduct used as a cement replacement. Improves chemical resistance and durability; common in foundations and slabs in industrial areas.
Natural stone shingles with 75–150 year life. Most expensive roofing option ($2,500–$5,000 per square installed); requires specialty contractors and structural engineering.
A natural metamorphic rock used for roofing, prized for its beauty and 75–150 year lifespan. Hard slate (Pennsylvania, Virginia) outlasts soft slate. Extremely heavy (10–14 lbs/sq ft) — structural assessment required.
A horizontally-sliding two-panel window. Easier to operate than double-hung; less weather sealing. Common in mid-century and ranch architecture.
An adjustable nut-and-washer connection used on sink P-traps and tubular drain assemblies. Allows easy disassembly for clog clearing without tools.
The incline given to drainage pipes and site grading to allow gravity flow of water. Drain pipes require a minimum 1/4" per foot slope. Site grading should slope 6" away from the foundation in the first 10 feet.
Reduced drain flow in sinks, tubs, or showers caused by accumulated grease, soap scum, hair, or foreign objects. Try a plunger or hair-catching drain tool first; mechanical snaking for stubborn blockages.
A concrete consistency test measuring how much fresh concrete settles when a metal cone is removed. 3–5 inch slump is typical for residential pours; higher slump = more water = lower strength.
A WiFi video doorbell (Ring, Nest, Eufy) with motion alerts, two-way talk, and cloud or local recording. Battery, hardwired, and Power-over-Ethernet versions available.
A garage door opener with built-in WiFi control. Newer Liftmaster and Genie models eliminate the need for myQ adapters.
A WiFi adapter (myQ, Genie Aladdin Connect) adding smart features to existing garage door openers. Notifications, scheduling, and remote operation.
A central controller bridging different smart-home protocols. Examples: SmartThings, Hubitat, Home Assistant, Apple HomePod (HomeKit).
A WiFi sprinkler controller (Rachio, Hydrawise) using local weather data to skip unnecessary watering. EPA WaterSense labeled; saves 20–30% on water bills.
Wireless-controlled lighting (Hue, LIFX, Nanoleaf). Color temperature and brightness control; scene programming; geofencing automation.
An electronic controller (SPAN Panel, Lumin, Generac PWRcell) that sheds non-essential loads automatically during outages or peak times. Reduces required battery or generator size.
An electronic deadbolt with keypad, app, or biometric entry (August, Schlage Encode, Yale Assure). Allows guest codes, remote unlock, and activity logs. Replace batteries annually.
WiFi or Z-Wave outdoor lighting (Hue Outdoor, Govee). Color-changing, scheduling, scenes; integrates with smart-home automation.
A WiFi or Z-Wave outlet adapter providing app and voice control. Gateway smart-home device; cheap and adds intelligence to any plug-in appliance.
An outlet with WiFi or Z-Wave control allowing on/off, scheduling, and energy monitoring. Common brands: TP-Link Kasa, Leviton Decora Smart.
A WiFi smoke detector (Nest Protect, X-Sense) sending alerts to phones during alarms. Combined CO/smoke models; replace every 7–10 years.
A WiFi or Z-Wave wall switch that allows app or voice control of a fixture. Most require a neutral wire — older boxes may need rewiring before smart-switch installation.
A programmable thermostat with Wi-Fi connectivity, smartphone app control, and learning capabilities. Ecobee and Nest models save $100–$200/year in energy. Ecobee SmartSensor extends temperature sensing to occupied rooms.
A smart-thermostat feature that uses smartphone GPS to detect when the home is empty and adjust setpoints automatically. Can save 10–15% beyond standard programming, especially for irregular schedules.
Algorithms (Nest, Ecobee) that build temperature schedules from user adjustments and home occupancy. Most learning thermostats achieve full optimization within 2–3 weeks of installation.
A toilet with bidet seat, heated seat, auto-flush, deodorizer, and night light functions. Requires a 120V GFCI outlet and water supply. Costs $1,500–$10,000+; common in primary-suite remodels.
A vapor retarder (CertainTeed MemBrain) that changes permeability with humidity. Allows wall drying in summer while blocking moisture in winter — best of both worlds.
A combined intake/exhaust vent installed at the roof eave, used when soffits cannot accommodate traditional vents. Common with closed-eave designs in modern architecture.
A life-safety device that detects smoke from fires and sounds an alarm. Required by code in every sleeping room, outside sleeping areas, and on each level. Interconnected alarms alert the entire home. Replace every 10 years.
A texture-free wall (Level 5 drywall finish) with three skim coats and full sanding. Premium finish required for high-end paint jobs and modern aesthetics.
Silicone-Modified Polyester paint finish — mid-tier durability with shorter color stability than Kynar. Adequate for residential applications in moderate climates.
Hairline cracks in solar cells that appear as discoloration over years. Cosmetic on most panels but a long-term degradation indicator.
An older heavy-duty toggle switch design rated for higher amperage. Largely replaced by modern Decora and toggle switches.
Hydronic tubing embedded in concrete driveways, walkways, and stairs that melts snow on contact. Powered by a boiler or heat pump with glycol fluid. Costly but eliminates plowing and ice hazards.
A soft natural stone with charcoal-gray color and warm feel. Heat- and stain-resistant but scratches readily; develops a natural patina over time.
Pre-grown grass that is harvested with its root mat intact for immediate transplanting, providing instant lawn coverage. Available in warm-season species (Bermuda, Zoysia, St. Augustine) and cool-season (tall fescue, Kentucky bluegrass).
Laying pre-grown grass mats for instant lawn. More expensive than seed but instant results; install in spring or fall for best establishment.
The underside of a roof eave overhang. Aluminum or vinyl panels with built-in vent slots provide attic intake ventilation.
A boxed-in section of ceiling that conceals ductwork or plumbing or visually frames a kitchen. Often added in basements and over kitchen cabinets.
An intake vent in the underside of an eave that allows outside air to enter the attic. Combined with ridge or gable vents, soffit vents provide the airflow that prevents attic moisture and ice dams.
The intake component of an attic ventilation system — perforated soffit panels or individual vents allow cool outdoor air to enter the attic cavity at the eave, creating a continuous airflow path from eave to ridge.
A cleaning method using low water pressure (80–100 PSI) combined with specialized cleaning solutions to kill and remove algae, mold, mildew, and bacteria from siding, roofing, and painted surfaces without damage.
A drawer slide with damping mechanism preventing slam-shut. Blum and Häfele are leading brands; standard on most modern cabinets.
A cabinet hinge with damper preventing slam-shut. Standard on premium cabinets; retrofittable on existing hinges as add-on adapters.
Living elements of a landscape — plants, trees, lawn, mulch beds. Adds color, seasonal interest, and reduces hardscape's heat-island effect.
Materials added to soil to improve its physical or chemical properties — compost, topsoil, perlite, gypsum, lime, and sulfur are common amendments. A soil test identifies what amendments are needed before planting.
A buried probe that measures soil water content. Pairs with smart controllers to irrigate only when soil is actually dry.
The main vertical drain pipe in a plumbing system that carries waste from all fixtures to the building drain and then to the sewer or septic. Also called a soil pipe or waste stack.
A laboratory analysis of soil samples that measures pH, nutrient levels (nitrogen, phosphorus, potassium), organic matter, and drainage characteristics. Results guide fertilizer and lime applications for lawns and gardens.
A photovoltaic-powered attic exhaust fan eligible for the federal residential solar tax credit. Operates only when the sun shines (when needed) and avoids drawing conditioned air through leaks.
A code-required exterior disconnect allowing utility crews to safely de-energize a solar system. Installed near the meter base.
A rating from 0 to 1 measuring how much solar radiation a window transmits. Lower SHGC (0.2–0.3) reduces cooling loads in hot climates; higher SHGC (0.5–0.6) allows passive solar heating in cold climates.
Building and utility inspections of installed solar systems. Required before permission to operate (PTO) is granted by the utility.
How much DC input becomes usable AC output. Modern inverters achieve 96–98% efficiency. Spec affects total system production.
A third-party-owned solar system rented to the homeowner. Predictable payment vs. utility variability. Locks the property to the system at sale.
Financing for solar with the homeowner retaining ownership. Maintains ITC eligibility; standard payback 6–12 years. Best long-term financial option.
Cash purchase: best total return; loan: keeps capital free with similar payback if rate <8%; lease/PPA: smallest savings but no upfront cost.
The percentage of a home's electricity needs provided by the solar system — typically designed for 90–100% offset. Actual production varies with shading, orientation, panel degradation, and weather.
A photovoltaic (PV) module that converts sunlight into DC electricity, inverted to AC for home use. Residential systems are typically 6–12 kW. Eligible for the 30% federal investment tax credit through 2034.
Annual loss of solar output, typically 0.3–0.5% per year. After 25 years, panels still produce 85%+ of original capacity.
Years to recover solar investment through bill savings. Typical residential 6–12 years depending on rates and incentives. After payback, savings are essentially free.
Engineering and electrical drawings submitted for solar permitting. Most jurisdictions require licensed PE-stamped plans for grid-tied systems.
Power Purchase Agreement — a third-party-owned solar system where the homeowner buys the power produced. No upfront cost; lower savings than ownership.
A modeled annual energy output for a solar system. Accounts for tilt, orientation, shading, and local climate. Utility approves based on this estimate for net metering.
PV USA Test Conditions — a more realistic solar panel output rating than standard test conditions (STC). 80–87% of STC for typical panels.
A photovoltaic system converting sunlight to electricity. Components: panels, inverter, racking, monitoring, and (optional) battery storage.
The mounting system anchoring solar panels to a roof or ground-mounted structure. Must penetrate the roof to structural rafters using waterproof lag bolts and flashing boots — proper racking prevents roof leaks.
A home designed and wired to make future solar panel installation simpler and less expensive — including conduit run from the roof to the electrical panel, a solar-dedicated breaker space, and south-facing roof area.
A new home roof certified to support solar with reinforced underlayment, ample electrical capacity, and pre-installed conduit. Increasingly standard in California.
Building-integrated photovoltaic products that replace conventional roofing while generating electricity. Tesla Solar Roof and GAF Timberline Solar are leading products. More expensive than panel solar; eliminates need for racking on the roof.
Mesh trim around the bottom of a solar array preventing nesting and debris accumulation. Recommended in raptor and squirrel territories.
Standard Test Conditions — the marketing wattage on a panel label. Optimized lab conditions; real-world output is 70–85% of STC.
The federal Investment Tax Credit (ITC) provides a 30% credit on solar system cost (panels + installation) through 2032 for homeowners. Applied to federal income tax owed — unused credit carries forward to future years.
A reflective tube (Solatube, VELUX Sun Tunnel) bringing daylight from the roof to interior rooms. No structural framing needed; eligible for solar tax credit when installed with daylight panel.
A copper-pipe joint made by heating a fitting and tubing with propane or MAPP gas and flowing lead-free solder into the gap. Standard for copper repair — flux residue must be flushed for water quality.
The horizontal 2× lumber at the base of a stud wall. Treated lumber required when in contact with concrete; nailed or anchor-bolted to the foundation.
An interior door with a particleboard or MDF core between face panels. Heavier, better sound isolation, and more durable than hollow-core. Worth the upgrade in primary suites.
Flooring milled from a single piece of wood, typically 3/4" thick. Refinishable many times over its life; not recommended over concrete or below grade.
An opaque deck stain that hides wood grain like paint but penetrates better. Longest-lasting deck finish (5–10 years) but obscures wood character.
A poured polymer countertop (Corian, Hi-Macs) with seamless joints and integrated sinks. Repairable scratches; mid-range pricing; non-porous.
A premium exterior door from solid lumber or stave-core construction. Annual maintenance (refinishing, weatherstripping) needed to maintain warranty and appearance.
An air pump that injects air bubbles into spa jets for a massage effect. Separate from the water pump. Can be noisy — variable-speed blowers reduce noise. Runs only when activated by a spa control system.
A self-contained heater, pump, and controller for a hot tub. Common sizes 4kW–11kW; replace as a unit when major components fail.
Plastic crosses sized 1/16" to 1/2" for consistent grout joint width. Removed before grouting; modern leveling systems often include integrated spacers.
Lightweight paste for filling small holes and dings before painting. Tubs of all-purpose spackle dry fast; use joint compound for dings over 1/4".
The flaking or peeling of the surface layer of concrete or masonry, typically caused by freeze-thaw cycles, reinforcing steel corrosion, or low-quality concrete. Seal concrete surfaces to prevent spalling.
Surface flaking or chipping of concrete, usually from freeze-thaw cycles or de-icing salts. Repair with polymer-modified patch; address cause to prevent recurrence.
Opaque glass panels used to conceal floor slabs, columns, and mechanical systems in curtain wall and storefront window systems. Not a load-bearing element.
Stone Plastic Composite — a rigid core in modern LVP that resists denting and dimensional change with humidity. Better stability than older WPC under heavy furniture.
A technical document specifying the exact products, materials, and installation requirements for a construction project. Provided to contractors during bidding to ensure all prices are based on equivalent materials.
Third-party inspections performed by certified inspectors during construction — required for high-strength concrete, structural welding, deep foundations, and other critical elements. More rigorous than standard building department inspections.
A triangular layout tool used to mark 90° and 45° angles, guide circular saw cuts, and check plumb on framing members. Every carpenter's most-used hand tool — fits in a nail pouch.
A precast concrete or plastic trough at a downspout outlet that disperses water onto the lawn. Effective only with proper grading; downspout extensions are usually better.
A rustic fence with horizontal rails fitted into notched posts. Decorative; used in rural and traditional settings.
Replacing a localized damaged section of sewer pipe by excavating only at the failure. Less expensive than full lining or replacement when issues are isolated.
Localized exhaust at the source of moisture or pollutants — bath fans, range hoods, dryer vents — rather than whole-house ventilation. The first line of defense against indoor air-quality problems.
A directional fixture highlighting trees, walls, or architectural features. Uplighting trees adds drama; downlighting from trees creates moonlight effect.
Using an HVLP or airless spray system to apply paint for a smooth factory-like finish on cabinets, doors, and furniture. Produces the most flawless surface — preferred over brush-and-roller for cabinetry refinishing.
Using one-component foam in a can to seal small penetrations — pipes, wires, ducts, top plates. Quick, durable, and significantly more effective than caulk on irregular gaps.
A two-component liquid that expands into solid foam, providing both insulation and air sealing. Closed-cell foam achieves R-6 to R-7 per inch and acts as a vapor barrier; open-cell foam achieves R-3.5 to R-4 per inch.
Applying paint with airless or HVLP sprayer for fast coverage and brush-mark-free finish. Requires masking, ventilation, and respiratory protection. Best for cabinets, doors, and large open walls.
Modern replacement for sash cords — a coiled spring inside the jamb. Wears out over decades; replace as a kit when sashes won't stay open.
The distribution device in an irrigation system that disperses water in a specific pattern. Pop-up spray heads cover small areas (4–15 feet); rotor heads cover larger areas (15–45 feet) with a slower, more efficient precipitation rate.
Adjusting spray pattern, distance, and flow at each sprinkler. Annual maintenance to ensure even coverage; corrected misted heads waste 20–40% of water.
Blowing compressed air through sprinkler systems before winter. Prevents pipe and head damage from freezing water; annual service in cold climates.
A roofing-industry unit equal to 100 square feet. Materials are sold and labor priced per square; a 2,000 sq ft roof is 20 squares.
The total flat area of a roof — typically 10–40% larger than the footprint of the home once the roof slope is factored in. Steeper roofs require more material per square foot of footprint.
Floor noise caused by wood subfloor rubbing against fasteners, joist edges, or bridging members when flexed. Often repairable from below by adding screws; from above with special squeak-eliminating screws through carpet.
Squirrels chew solar wiring and nest beneath panels. Critter-guard mesh installation prevents damage; required by some warranty providers.
Solar Reflectance — the fraction of solar energy reflected by a roof surface. Values 0–1; cool roofs typically rate 0.65 or higher initially.
Solar Renewable Energy Credit — a tradable certificate representing 1 MWh of solar generation. Sold separately from electricity in PJM, MA, NJ, and other state markets.
A leading SREC marketplace connecting homeowners with utilities required to buy SRECs. Provides ongoing income stream beyond electricity savings.
A coarse warm-season grass for Gulf Coast and Florida lawns. Shade tolerant; chinch-bug susceptible without preventive treatment.
A push-in receptacle or switch terminal where the wire is held by a spring clip. Allowed by code but loosens over time — pros use the screw terminals (or pigtails) for reliability.
The main vertical drain pipe in a plumbing system that carries waste from all floors to the sewer or septic system. Each stack requires a vent pipe to allow air in and odors out.
A primer designed to seal stains, smoke, and water marks. Shellac-based BIN, oil-based Cover Stain, and water-based Smart Prime are the leading product types.
Acid-stained or water-based dye applied to concrete for permanent coloring. Penetrates rather than coats; lasts decades with periodic resealing.
Invista's premium nylon stain-protection system. Stainmaster carpets carry stain warranties up to 25 years; widely available at flooring retailers.
A rounded-edge transition strip installed at the edge of each stair tread where flooring meets the step. Required to provide a safe edge and meet code for riser height and tread depth uniformity.
A long carpet strip installed down the center of hardwood stairs with exposed edges on each side. Adds traction and softness to wooden stairs.
Concrete impressed with rubber stamps to mimic stone, brick, or slate. Decorative; cost approaches natural stone but with concrete maintenance benefits.
Pressed metal shingles that mimic asphalt, slate, or shake. Lighter than tile; longer life than asphalt at higher cost (similar to architectural shingle ×2.5).
A portable plug-in dehumidifier rated by pints/day at 80°F/60% RH. Best for single rooms, basements, and crawlspaces. ENERGY STAR models use 10–15% less power than non-rated units.
A permanently installed natural gas, propane, or diesel generator that automatically powers the home during outages. Whole-home models 18–24kW; sized via Manual J-style load study.
A small continuously-lit gas flame in older furnaces and water heaters. Wastes 1,000–4,500 BTU/hr year-round. Modern hot-surface and direct-spark ignition has fully replaced standing pilots in new equipment.
Vertical interlocking metal panels with raised seams. 50+ year life; superb wind and hail resistance; $9–$14 per sq ft installed. Increasingly popular in modern and farmhouse styles.
A high-microfarad capacitor used briefly to boost motor starting torque, then dropped out by a potential relay. Found mostly in older PSC and CSR motor systems.
A pre-cut row of shingles installed at eaves with the sealant strip facing up to bond the first course of field shingles. Critical for wind resistance.
Resistance to airflow inside ducts, measured in inches of water column. High static pressure indicates restricted ducts, dirty filters, or undersized returns — and causes premature blower failure.
A premium whole-house humidifier that boils water to produce sterile steam injected into the supply duct. Most precise control, highest output, and cleanest moisture — at $1,200–$2,500 installed.
A foam-filled steel exterior door — most common builder-grade option. Inexpensive and secure; vulnerable to dents and rust over time.
Light-gauge steel studs and tracks used for non-load-bearing interior partition walls in commercial construction and increasingly in residential. No shrinkage, rot, or pest problems. Requires special bits and screws.
A driven steel pier that bypasses unstable near-surface soil to reach stable bearing layers. Used to stabilize and lift settling foundations. Installers can monitor and adjust pier loads to lift sunken areas.
A short concrete wall on a footing supporting the home's framing. Common in slab and crawlspace foundations; raises the wood structure off grade.
Individual L-shaped pieces of metal woven between shingles where a roof meets a wall. The correct method for vertical wall transitions; never use continuous metal flashing along sidewalls.
A roof framed on-site with rafters, ridge boards, and ceiling joists rather than pre-engineered trusses. More flexible for custom architecture; pricier than truss-framed roofs.
A penetrating sealer that deepens stone color while protecting it. Popular on slate, travertine, and quartzite to highlight natural mineral colors.
A penetrating sealer that protects natural stone from staining. Required on all natural stone — marble, travertine, limestone, granite — at install and reapplied every 1–5 years.
The interior horizontal flat surface at a window — what most people incorrectly call the sill. Holds plants, decor, and provides surface for handles on hung windows.
A small angle or straight shut-off valve at every fixture. Modern quarter-turn ball-style stops replace older multi-turn compression stops; both isolate the fixture for repair.
An order issued by a building inspector or code enforcement officer requiring all work on a project to stop immediately due to safety violations, working without a permit, or non-compliance with approved plans.
A clog or blockage in a drain, toilet, or sewer line. Partial stoppages slow drainage; complete stoppages cause backups. Recurring stoppages may indicate root intrusion or pipe collapse requiring camera inspection.
An itinerant roofing contractor who moves into an area after a major storm to capitalize on insurance claims. Often use high-pressure tactics, cut corners, and leave town before warranty issues surface. Always hire local contractors.
An additional window installed outside or inside the primary window. Older homes use exterior storms; modern interior storms (Indow, Climate Seal) provide energy savings without altering exterior appearance.
A long heavy-duty metal plate replacing the original strike plate, with 3" screws into the stud. The single most effective security upgrade — breaks lever resistance for burglary.
An inverter converting DC from a series-connected string of panels to AC. Lower cost than microinverters; partial shading affects entire string.
Café-style lights on weatherproof cable. Outdoor entertaining staple; specify rated for permanent outdoor installation.
Traditional 1.5–3 inch wide hardwood. More stable than wide planks; common in pre-1970 homes and historic restorations.
The professional process of removing moisture from structural materials — drywall, framing, flooring — using desiccant or refrigerant dehumidifiers and air movers. Monitored with moisture meters until materials reach baseline readings.
A licensed engineer who designs and stamps structural elements — beams, columns, foundation systems, and framing connections. Required for load-bearing wall removal, significant additions, and projects in high-seismic or high-wind zones.
A building panel with a rigid foam insulation core bonded between two structural facings (typically OSB). Provides high insulation values with minimal thermal bridging — used for walls, roofs, and floors in energy-efficient construction.
A cementitious exterior finish applied in three coats (scratch, brown, finish) over metal lath. Hardie Stucco and traditional 3-coat stucco differ from one-coat EIFS systems. Requires painting every 5–10 years.
A synthetic stucco system applied in a single thick coat over a base coat, used widely in Sun Belt construction. Different from traditional 3-coat stucco — improper installation causes widespread water intrusion problems in EIFS systems.
Hairline stucco cracks are normal and cosmetic — seal with elastomeric caulk. Wide cracks or areas of hollow or separated stucco indicate moisture infiltration and may hide significant wood rot and mold behind the surface.
The cavity between two adjacent studs. Houses insulation, wiring, and plumbing within the wall.
Common stud spacing: 16" on center for most walls, 24" on center for non-load-bearing or modern advanced framing. Affects drywall thickness and shear performance.
A brand name often used generically for air admittance valves. Same function as AAV — admits air during drain flow, closes when at rest.
Mechanical removal of tree stumps using a grinder. Removes stump 6–12 inches below grade for replanting or sod; cheaper than full stump excavation.
The standard radon mitigation technique — a suction pipe through the slab and a fan continuously draw radon from beneath the slab and exhaust it above the roofline, reducing indoor radon by 99%.
A specialty contractor hired by the general contractor to perform specific portions of the work — electricians, plumbers, HVAC, tile setters, painters. The GC remains responsible for all subcontractor work quality.
The temperature difference between liquid refrigerant leaving the condenser and its condensing temperature. Manufacturer-specified subcooling (commonly 8–12°F) is the charging benchmark for TXV systems.
The structural panel layer over the joists, typically 3/4" T&G plywood or OSB. Must be flat, dry, and securely fastened before any finish floor goes down.
Construction adhesive (PL Premium, Liquid Nails) applied to joist tops before screwing or nailing the subfloor. Eliminates floor squeaks for the life of the home.
An additional panel fed from the main panel, used to extend circuits to remote areas (garage, addition, ADU). Must have separated neutrals and grounds when in a separate building.
The most destructive termite species in the U.S. — lives in underground colonies and builds mud tubes to access wood above. Responsible for billions of dollars in damage annually. Annual inspections are essential in the South and West.
Rectangular ceramic or porcelain wall tile, traditionally 3"×6" or 4"×8". Named for early 20th-century New York subway stations; timeless choice for kitchens and baths.
The larger-diameter refrigerant line carrying low-pressure cool vapor from the evaporator back to the compressor. Always insulated to prevent condensation and efficiency loss in conditioned and unconditioned spaces.
A temporary filter installed in the suction line after a compressor burnout to capture acid and debris. Removed after a defined run period to restore proper system flow.
The pit installed in the lowest point of a basement or crawl space that collects groundwater for the sump pump. A sump basin typically holds 15–30 gallons. A tight-fitting lid prevents humidity and radon from escaping into the living space.
An automatic pump in a basement sump pit that ejects groundwater to prevent flooding. Pedestal pumps are easier to service; submersible pumps are quieter and pump higher volumes.
An enclosed room with extensive glass walls and roof designed to capture sunlight. Three-season sunrooms are not insulated or HVAC-conditioned; four-season rooms are fully insulated and climate-controlled. Permitting required.
The temperature difference between refrigerant vapor leaving the evaporator and its boiling point at that pressure. Target superheat (typically 8–14°F) confirms proper refrigerant charge in fixed-orifice systems.
Conditioned air delivered into a room through the HVAC duct system via registers and diffusers. Supply air must be balanced with return air for proper system operation and even temperature distribution.
The flexible braided stainless or corrugated metal lines connecting shut-off valves to faucets, toilets, and dishwashers. Replace every 5–10 years — failed supply lines are a leading cause of catastrophic water damage.
Same as a stop valve — the small isolation valve on the wall at sinks, toilets, and appliances. Standardized to 3/8" compression × 1/2" inlet for residential.
A three-party agreement where a bonding company guarantees to a homeowner (obligee) that the contractor (principal) will fulfill their obligations. Protects against incomplete work, subcontractor non-payment, and property damage.
A T-bar grid hung from joists supporting drop ceiling tiles. Quick to install; provides easy access for service work.
A shallow, gently sloped channel designed to manage surface water runoff by directing it to a drainage area or retention pond. A cost-effective first line of defense for yard drainage problems before installing underground drains.
A fitting designed to be soldered onto copper pipe. Tradesperson slang from the way solder 'sweats' into the joint when properly heated.
A wiring configuration that runs power from a light fixture location down to a wall switch and back, allowing the switch to control the fixture. Smart switches with neutral wires allow three-way switching from any location.
Polymer or composite shingles that mimic slate at a fraction of the weight and cost. 50-year warranty; impact-resistant; popular in older neighborhoods restoring historic appearance.
Artificial grass for lawns, putting greens, and pet areas. Drainage and infill matter; modern non-toxic infills replace older crumb rubber.
A polypropylene or polyester-based underlayment that's lighter, more tear-resistant, and walks better than felt. Standard on quality roofing installs since 2010.
A bench-mounted circular saw for ripping lumber to width, crosscutting, and making angled cuts with a high degree of precision. The central tool in any carpentry or cabinetry shop. Requires a blade guard and push stick for safety.
A wood strip with angled tacks installed around a room's perimeter. Holds carpet edges in place under a properly stretched installation.
An outlet with shutters that block insertion of single-prong objects, only opening when both blades are inserted simultaneously. Required in dwellings since 2008 NEC.
A breaker that fits two 15A or 20A circuits in one panel slot. Allowed only in panels rated for tandem breakers in specific slot positions — verify the panel label.
An older boiler design that produces domestic hot water through an internal heat-exchanger coil. Inefficient — modern installations use a dedicated indirect tank with the boiler's heating loop.
An on-demand water heater that heats water as it flows, with no storage tank. 24–34% more efficient than tank heaters; lasts 20+ years vs. 8–12 for tanks. Higher install cost ($2,500–$5,000).
Brown staining that appears through paint on cedar, redwood, or pressure-treated wood caused by water-soluble tannins migrating to the surface. Use an oil-based or shellac primer before painting to block tannin bleed.
Complete removal of existing roofing material down to the deck before installing new roofing. Always recommended over a lay-over for better results, inspection of the deck, longer new shingle life, and most manufacturer warranties.
Removing all existing roofing layers down to the deck before installing new roofing. Required when adding more than the local code's permitted layers (usually 2).
Mineral fiber and cement composite panel used for roof decking in commercial construction — provides insulation, sound absorption, and a finished interior surface in one panel.
The temperature swing a thermostat tolerates before calling for heating or cooling. Typical setting is 0.5–1°F. Wider differentials reduce cycling but allow larger room-temperature variations.
Heat-treated glass that breaks into small pebbles instead of large shards. Required by code in doors, sidelights, near tubs/showers, and within 24" of door swings.
An in-ground monitoring and baiting system (Sentricon, Trelona) installed around the perimeter that attracts termites into feeding stations containing slow-acting insecticides spread back to the colony. Requires professional monitoring.
An annual pest control contract providing regular inspections and treatment retreatment at no additional cost if termites are found. Most bonds do not cover repair of damage caused by termites — verify the terms before purchasing.
A visual and probing inspection by a licensed pest control operator to detect wood-destroying insects including subterranean termites, drywood termites, carpenter ants, and beetles. Required by lenders in many states before closing.
A metal barrier placed between the foundation and sill plate to discourage termites from migrating from soil into wood framing. Not a complete barrier — still requires annual inspection and treatment in high-risk areas.
Solar shingles integrated into a roofing system. Premium pricing; long install times; aesthetic alternative to roof-mounted panels for high-end homes.
A decorative or functional additive (sand, perlite, silica) mixed into paint to create surface roughness — used on ceilings and exterior walls. Knockdown, orange peel, popcorn, and skip trowel are common spray-applied textures.
Sprayed or troweled drywall finishes — orange peel, knockdown, popcorn (banned for asbestos in pre-1978 homes), Santa Fe, Spanish lace. Match existing texture when patching.
A material with low thermal conductivity inserted between two thermally conductive elements to reduce heat flow — examples include foam between a concrete wall and wood framing, and aluminum spacers in window frames.
A path of heat flow through framing, fasteners, or other conductive materials. Wood studs reduce wall R-value 10–25%; continuous insulation breaks thermal bridges.
The flow of heat through a thermally conductive material connecting the warm and cold sides of an insulated assembly — like studs in a wall. Exterior continuous insulation breaks the thermal bridge of the stud.
How efficiently a roof radiates absorbed heat back to the sky. Cool roofs combine high reflectance with high emittance (>0.75) for maximum cooling effect.
A small expansion tank on the cold supply line of a water heater. Required wherever a check valve, PRV, or backflow preventer is installed — absorbs water expansion as the tank heats.
Vinyl-wrapped MDF cabinet doors. Budget friendly; smooth painted look. Vulnerable to peeling and heat damage near ovens and dishwashers.
The user interface that controls when and how hard an HVAC system works to maintain desired temperature. Smart thermostats (Ecobee, Nest, Honeywell T6) provide scheduling, remote access, and energy reports, saving $100–$200/year.
A 24V common wire required by most smart thermostats to provide continuous power. Older two-wire thermostats need a C-wire add-on or battery-only smart model.
An installer setting that tells the thermostat the system has a heat pump, configures O/B reversing-valve logic, and manages auxiliary heat lockout. Critical to set correctly; mis-setting causes high bills.
The temperature you set on a thermostat. Each 1°F closer to outdoor temperature can save 1–3% on heating/cooling — set 78°F for AC and 68°F for heating to optimize comfort and cost.
A premium shower valve that holds a fixed water temperature regardless of pressure or supply-temperature changes. Allows separate volume control and is favored in luxury baths.
Single-conductor building wire rated 90°C dry. Pulled inside conduit for branch circuits, feeders, and service runs in commercial and residential applications.
ANSI requires 80% thinset coverage in dry areas and 95% in wet areas. Verify by lifting an installed tile during the first row.
Polymer-modified cement adhesive for tile installation. Modified thinset is required for porcelain and large-format tile; unmodified for ceramic and dimensionally-stable installs.
A low-power mesh-networking protocol for smart-home devices. Backbone of Matter; used by Nest, Apple, and Eve devices for reliable communication.
A pair of switches controlling one light from two locations (top and bottom of stairs, ends of a hallway). Wiring uses a traveler conductor between switches.
The horizontal piece at the door bottom — typically aluminum with adjustable height. Adjustable thresholds compensate for door wear and seasonal movement.
Single-conductor wire rated 90°C wet or dry. The dominant building wire used in EMT, PVC, and underground conduit installs nationwide.
Cement, fiber cement, or foam panel installed over plywood subfloor before tile. Provides moisture-stable substrate; thinset bonds to it without warping.
Metal or PVC profile (Schluter Jolly, Rondec) finishing exposed tile edges. Eliminates need for bullnose tile and provides a modern clean look.
Disposable plastic clips (Tuscan, RUBI, QEP) that hold adjacent tiles flush during thinset cure. Essential for 12"+ format tiles to prevent lippage.
Clay or concrete roof tiles common in Spanish, Mediterranean, and Mission-style architecture. 50–100 year lifespan; underlayment typically needs replacement at 30–40 years.
An electric tile cutter using a diamond-coated circular blade and a water bath to make precise cuts in ceramic, porcelain, stone, and glass tile. Water cooling prevents blade overheating and tile cracking.
The adhesive used to bond tile to a substrate — available as thin-set mortar (Portland cement based), medium-bed mortar (for large-format tile), and mastic adhesive (not for wet areas). Large-format tiles require larger trowel notches.
A European-style window that opens inward (turn) for full ventilation or tilts at the top for secure ventilation. Common in modern builds and luxury remodels.
A retaining wall built of pressure-treated 6×6 timbers. Less expensive than block; lifespan 20–30 years before replacement; common in residential applications.
A graph showing how long a breaker takes to trip at various overcurrent levels. Used by engineers for selective coordination studies.
Electric rates varying by time of day. Solar-and-battery owners shift exports to peak hours; standalone solar generates most during low-rate midday.
A defrost-initiation method that starts a defrost cycle after a fixed runtime (e.g., 90 min) if outdoor coil temperature is below freezing. Standard on legacy heat pumps; increasingly replaced by demand defrost.
An insurance policy protecting against undisclosed liens, easements, encumbrances, and title defects — both from pre-closing (owner's policy) and from lender's post-closing (lender's policy) perspectives. One-time premium at closing.
The recessed area at the bottom front of base cabinets. Standard 4" deep × 3.5" tall. Allows comfortable standing posture at the counter.
Traditional flip-style switch. Less expensive than Decora-style but considered dated. Still common in low-budget rentals and older homes.
A plastic ring that raises a recessed flange flush with new flooring. Prevents toilet rocking and seal failure after tile or LVP installation over old vinyl floors.
A joinery method where one board's protruding tongue fits into another's groove, creating tight, seamless joints. Used in hardwood flooring, solid wood paneling, and porch decking. The standard profile for nail-down hardwood floors.
Subflooring panels with interlocking edges that transfer loads between sheets. Standard for residential floor sheathing; reduces deflection and squeaks.
Two stacked horizontal 2× members capping a stud wall. The double top plate distributes loads from joists or rafters above into the studs below.
A modern silicon-cell technology — Tunnel Oxide Passivated Contact — with 22%+ efficiency. Increasingly the residential standard since 2024.
Decorative shaping of plants into geometric or sculptural forms. Boxwood, holly, and yew are common topiary subjects; requires regular shearing.
An acrylic or epoxy sealer that forms a film on concrete. Enhances color but can be slippery and peel under UV exposure; reapply more often than penetrating sealers.
The upper layer of soil (6–12") with the highest concentration of organic matter and nutrients. Adding 4–6" of quality topsoil improves drainage and fertility in compacted or depleted areas. Test existing soil before ordering topsoil.
A propane or MAPP gas torch used to solder (sweat) copper pipe joints. MAPP gas burns hotter — preferred for larger pipe. Lead-free 95/5 tin-antimony solder is the only approved solder for potable water systems.
Modified bitumen membrane applied with an open-flame torch. Effective and durable but fire risks have led many jurisdictions to require self-adhered alternatives near combustibles.
A faucet (Delta Touch2O, Kohler Sensate) that turns on when tapped anywhere on the body. Useful for messy hands; battery-powered with 2–3 year battery life.
Saved labeled paint for repairing small scuffs and dings. Touch-ups blend best in flat and matte sheens; higher sheens often require full-wall recoats.
A motion-activated faucet using infrared or capacitive sensors. Reduces germ transfer and water waste. Requires batteries or low-voltage transformer — verify cabinet outlet before installing.
An alternative flush design using a vertical tower instead of a flapper. Common on dual-flush toilets; provides crisper flush activation and longer service life.
Thermoplastic Polyolefin — a heat-welded white single-ply membrane for low-slope roofs. UV-reflective (cool roof), recyclable, and 20–25 year lifespan. Common on modern flat residential additions.
An LED-friendly dimmer using reverse-phase control. Smoother LED dimming and quieter operation than older leading-edge dimmers; preferred for modern dimmable LED lamps.
A Trane Technologies HVAC brand known for reliability and wide service network. XV20i TruComfort is their top residential variable-capacity heat pump. Comfortsite dealer locator helps find factory-trained installers.
An electrical device that safely disconnects a home from utility power before connecting a generator. Automatic transfer switches (ATS) detect outages and start a standby generator within seconds without any manual intervention.
A molding that bridges the height and edge difference between two flooring types — reducer strips, T-moldings, end caps, and threshold pieces all serve different transition scenarios.
A small window above a door or another window. Adds light without sacrificing privacy; common in older homes and high-end builds.
A small valve that periodically refills floor-drain traps with water to maintain the sewer-gas seal. Required on floor drains in dry locations (mechanical rooms, garages).
The internal diameter of a toilet's S-trap. Larger trapways (2 1/8" or fully glazed) flush better and clog less than budget 1 1/2" trapways. A key spec when shopping high-use toilets.
A porous natural stone formed in mineral springs. Filled travertine has cavities filled at the factory; unfilled requires regular resealing in floor applications.
A ceiling with an inverted tray shape — a recessed center area framed by a perimeter soffit. Adds height and architectural interest.
Steel rods through tree branches connecting weak crotches. Reinforces split or cracked unions; arborist-installed.
Steel cables installed in tree canopies to limit branch movement. Prevents storm damage and breakage in mature trees with weak unions.
Roots circling a tree's base, eventually strangling it. Common in container-grown nursery trees; correct at planting by spreading roots horizontally.
A fenced area around trees during construction, sized by drip line. Prevents root damage from compaction and trenching.
Professional felling and removal of trees — including stump grinding, debris removal, and traffic coordination for large trees near structures. Prices range from $300 (small tree) to $5,000+ (large tree near structure). Always get 3 quotes.
Permits required by some cities to remove large or protected trees. Verify before removing trees over 8" diameter; fines up to $10,000 in some Florida and California cities.
Cutting all branches back to stubs. Damaging practice — causes weak regrowth, decay, and accelerated tree decline. Most arborists refuse to top trees.
Selective pruning of tree branches for safety, health, clearance from structures, and appearance. ISA-certified arborists follow ANSI A300 pruning standards. Never remove more than 25% of a tree's canopy in a single season.
A long, narrow drain in a garage, driveway, or commercial space. Plastic or stainless grates over preformed bodies; sized by required flow rate.
The market-leading composite decking brand made from 95% recycled materials. Transcend series carries a 25-year limited stain and fade warranty. Trex cannot be painted or stained — choose color carefully at purchase.
A premium polyester variant (Mohawk SmartStrand) with crush resistance approaching nylon. Permanent stain warranty common; bio-based alternative to traditional nylon.
A finish carpenter specializing in installing interior moldings, window and door casings, built-ins, and wainscoting. Requires precision measuring, clean cuts, and artful coping of inside corners.
The color used on baseboards, casings, and crown molding. Most homes use white or off-white trim; modern designs sometimes match trim to wall color.
A window with three layers of glass and two sealed gas-filled gaps. 30% better U-factor than double-pane; premium pricing pays back in cold climates.
The size of notch on a trowel — bigger tiles need bigger notches. Common: 1/4"×3/8" U-notch for 12×24 tile, 1/2" square notch for large format.
Individual small panes of glass separated by structural muntins. The most authentic historic look; expensive due to the labor and energy penalty of multiple sealed units.
A pre-engineered structural assembly of triangular frames used to span large distances in roofs and floors. Roof trusses are manufactured to exact specifications; field modification voids engineering without professional reassessment.
A pull-up diverter on a tub spout that redirects water to the showerhead. Simple and reliable; replace the entire spout if it fails. Sticks open when worn.
The process of removing deteriorated mortar from masonry joints and repointing with fresh mortar to restore weather-tightness and appearance. Prevents water infiltration that expands in winter and damages brick.
Natural stone with rounded edges and antiqued surface. Rustic, hand-crafted look; common for limestone and travertine in Mediterranean designs.
A wind-driven roof exhaust vent with rotating fins. Inexpensive and silent; effective only when there is wind and adequate soffit intake. Bearings can wear out and squeak after 8–10 years.
A traditional shower drain with a clamping ring that compresses the pan liner. Common with mud-bed showers and PVC liners; not compatible with most sheet membrane systems.
A compressor with high and low capacity stages — typically 67% and 100%. Runs longer at low stage for better humidity removal and quieter operation than single-stage equipment.
Older NM cable with only hot and neutral conductors (no ground). Common in pre-1962 homes. Receptacles served by two-wire cable cannot be replaced with grounded receptacles unless GFCI-protected.
A precision metering device that regulates refrigerant flow into the evaporator coil based on superheat. Improves efficiency over fixed-orifice systems, especially at part-load. A clogged or stuck TXV is a common no-cooling cause.
A surge protective device installed before the main service disconnect. Highest joule rating; protects from utility-side lightning and switching surges.
A surge protective device installed at or after the main service disconnect — the most common residential whole-house surge protector. Protects branch circuits from any surges that pass Type 1 protection.
A point-of-use surge protector (plug strip or hardwired receptacle) installed within 30 feet of the equipment it protects. Last line of defense for sensitive electronics.
Sulfate-resistant cement specified for foundations in soils with high sulfate content. Required by some western states' building codes; verify soil report.
Fire-rated drywall with glass fibers. Required between garage and house, on common walls in townhomes, and around furnaces and water heaters per code.
DuPont's brand of polyolefin spunbonded housewrap — the most widely used weather-resistant barrier in residential construction. Allows moisture vapor to pass outward while blocking liquid water infiltration.
A measure of how easily heat flows through a window or door — lower is better. ENERGY STAR climate zones target 0.18–0.30 for windows. Compare U-factor at the whole-window NFRC certified value.
The reciprocal of R-value (heat conductance). Used for windows and assemblies; lower is better. R-value × area / temperature difference = heat flow.
Underground Feeder cable — solid plastic-encased conductors rated for direct burial. Used for outbuildings, post lights, and outdoor receptacles where conduit isn't required.
A grounding electrode formed by 20 feet of bare copper wire embedded in the foundation footing. Required by NEC for new residential construction with concrete-encased electrodes.
An impact-resistance test using steel balls dropped on shingles. Class 4 (1.75" steel ball, 12+ feet) is the highest rating; common in Texas, Oklahoma, and Colorado markets.
A flexible mat (Ditra, RedGard Uncoupling) that allows the subfloor to move slightly without cracking the tile above. Required for tile over wood subfloors and large-format tiles.
Task lighting beneath upper cabinets — LED tape, puck lights, or hardwired strips. Hardwired strips with dimmer have the cleanest finished look.
The water-resistant layer beneath shingles. Felt paper (15# or 30#) and synthetic underlayments are the two main types; synthetic is now standard for new roofs.
A thin layer between subfloor and finished floor — cork, foam, rubber, or felt. Provides sound deadening, thermal insulation, and minor leveling.
A thin cushioning layer installed between the subfloor and flooring — provides sound absorption, minor height correction, and moisture protection. Required for most laminate and floating LVP installations.
A drawer slide hidden beneath the drawer box. More expensive but a cleaner look than visible side-mount slides; typical on premium cabinets.
A sink mounted below the countertop, with no rim above the surface. Easy counter cleanup; requires solid-surface counter (granite, quartz, etc.).
Design approach making spaces usable by people of all ages, sizes, and abilities without adaptation. Includes no-step entries, wider doorways (36"), lever handles, roll-under vanities, curbless showers, and grab bars.
Standard portland cement thinset without polymer modifiers. Required by some manufacturers (e.g., Ditra) since modified thinset can fail to cure between two impermeable surfaces.
An attic with insulation against the underside of the roof deck rather than the ceiling. Brings ductwork into conditioned space; requires special air sealing and vapor profile.
The plumbing code adopted by California and many western states — an alternative to the IPC. Published by the International Association of Plumbing and Mechanical Officials (IAPMO). More restrictive on some materials than the IPC.
Pre-mixed urethane grout (Bostik TruColor) — easier to install than epoxy with similar stain resistance. Slightly more flexible than cement grout.
An outlet with built-in USB-A or USB-C charging ports. Convenient for bedrooms and kitchens; verify the unit is UL-listed and check amp rating per port.
Before any digging, call 811 (the national one-call center) to have buried utility lines — gas, electric, water, sewer, communications — marked. Striking a buried line can be fatal and carries legal liability.
Cash incentives offered by electric and gas utilities for installing energy-efficient equipment — HVAC systems, water heaters, smart thermostats, and insulation. Check your utility's website or DSIRE.org for available rebates in your state.
An ultraviolet-C lamp installed in the air handler that kills mold and bacteria growing on the evaporator coil and drain pan. A maintenance aid — not a substitute for filter replacement or coil cleaning.
An ultraviolet sterilization chamber that kills bacteria and viruses in well water. Common pairing with sediment and carbon filtration; bulb replaced annually.
Tongue-and-groove paneling with V-shaped grooves at each joint. Cleaner modern look than beaded board; works for ceilings and walls.
A motion-detection wall switch that turns lights off automatically but requires manual on. Saves more energy than occupancy sensors in spaces where lights aren't always needed.
A backflow-prevention device on hose bibbs and irrigation valves that stops siphoned contamination from entering potable water. Required by code on all exterior hose connections.
The V-shaped area where two sloping roof planes meet. Valleys are high-stress areas vulnerable to leaks — must be properly flashed with ice & water shield and metal or closed-cut shingle valley flashing.
A bathroom cabinet with a sink integrated into the countertop — the primary storage fixture in a bathroom. Freestanding vanities are easy to install; wall-mounted vanities create an airy look and ease floor cleaning.
A material that blocks moisture vapor transmission. Required in cold climates on the warm side of insulation; not recommended in hot-humid climates where moisture flows the opposite direction.
A 6-mil polyethylene sheet over concrete slabs to block moisture migration into the flooring above. Required by most engineered hardwood and laminate manufacturers.
A material that slows but doesn't fully block vapor flow — Class I (impermeable), Class II (semi-impermeable), Class III (semi-permeable). Modern building science prefers Class II or III over Class I in most climates.
A motor controller that adjusts the speed of HVAC fans and pumps to match the exact load needed. Variable-speed air handlers and compressors are dramatically more efficient than single-speed equipment at part-load conditions.
An ECM pool pump that can run at multiple speeds. Federal law since 2021 requires VS pumps on most new installs; cuts pool electric costs 40–80%.
An air handler with an ECM blower motor that adjusts airflow continuously based on load. Provides quieter operation, better humidity control, and improved efficiency over fixed-speed equipment.
Permission from the local zoning board to deviate from a specific zoning requirement. Requires demonstrating hardship. Must be approved before construction begins — building illegally then seeking variance is rarely successful.
A multi-layer, hand-troweled plaster finish that creates a polished marble-like appearance. Premium finish; install cost $7–$15 per sq ft.
The main vertical vent that extends through the roof. Vent terminations must clear roof penetrations by 6 inches and be located 10 feet from any window or door per code.
A rubber- or lead-collared boot that seals the vent pipe penetration through the roof. The rubber gasket cracks in 10–15 years; replace before leaks stain the ceiling.
A traditional crawlspace with foundation vents. Modern building science shows venting often increases moisture problems in humid climates; encapsulation is the recommended retrofit.
The process of exchanging indoor air with outdoor air to remove pollutants, moisture, and odors. Code requires mechanical ventilation in energy-efficient homes. ERVs and HRVs recover energy while ventilating.
A heat-expanded mineral used as attic insulation from 1919–1990 in many homes. Vermiculite from Libby, Montana was contaminated with asbestos — test before disturbing any vermiculite insulation. Do not remove without professional abatement.
A French parquet pattern using multiple tile sizes in a repeating layout. Common for natural stone — limestone, travertine, marble — in formal entries and patios.
A tall single-hole faucet designed to clear the rim of a vessel-style sink. Spout heights typically 10–14 inches above the counter.
A durable, low-cost commercial flooring tile made from polyvinyl chloride — commonly used in commercial kitchens, healthcare facilities, and retail stores. Requires regular stripping, waxing, and buffing for maintenance.
A PVC fence resistant to rot, insects, and weathering. 25-year warranties common; higher upfront cost than wood, lower maintenance.
Exterior cladding made from PVC, available in dozens of profiles and colors. Lower maintenance than wood siding — never needs painting. Insulated vinyl siding adds R-2 to R-3 and reduces exterior noise.
A window with PVC frames. Most affordable replacement option; modern multichambered vinyl rivals wood in performance. Not available in dark colors in all climates due to heat absorption.
Volatile Organic Compounds — solvents that off-gas as paint dries. Low-VOC paints (<50 g/L) are now standard; zero-VOC formulations are widely available for sensitive occupants.
Chemical compounds that evaporate at room temperature from paints, adhesives, cleaning products, and finishes, contributing to indoor air pollution. Low-VOC and zero-VOC paints and finishes dramatically improve indoor air quality.
The voltage loss along a conductor due to its resistance. Long branch circuits (>100 ft) and feeders may need upsizing — code recommends 3% drop on branches, 5% total to load.
Variable Refrigerant Flow — a sophisticated multi-zone heat pump system common in commercial buildings and high-end homes. Single outdoor unit can serve 8–64 indoor zones with simultaneous heating and cooling.
The fraction of visible light passing through a window. Higher VT = brighter rooms; very low VT (<0.5) makes interior spaces feel dark.
A push-in lever-actuated wire connector that's faster and more reliable than wire nuts. Increasingly common in modern installations and re-pulls.
Wood paneling on the lower portion of a wall, typically 32–48 inches tall. Adds character and protects high-traffic walls. Beaded board, picture frame, and shaker styles common.
Paneling, beadboard, or tile applied to the lower portion of an interior wall — typically 32"–42" high — for aesthetic interest and wall protection. Available in painted MDF, solid wood, or tile.
An enclosed wardrobe space large enough to enter and move around — minimum 4×4 feet but typically 5×8 or larger for a functional master walk-in. Custom closet systems double storage capacity compared to basic rod and shelf setups.
A below-grade space with at least one wall fully above grade with a door or windows at grade level, providing direct outdoor access. More desirable and easier to finish than a full below-grade basement.
A roof slope safe for foot traffic without fall protection — typically 6/12 or shallower. Roofs above 8/12 require harnesses and toe boards.
A steel anchor and earth plate system stabilizing bowed foundation walls. Installs through the wall; deadman anchored in undisturbed soil 10–12 feet out.
Plywood, OSB, or insulating sheathing on exterior walls. Provides racking resistance and substrate for housewrap and siding.
A toilet bowl mounted to the wall with the tank concealed in the wall (in-wall carrier). Sleek look and easier floor cleaning; carrier installation typically adds $1,500–$2,500 over standard toilet costs.
A faucet with the body inside the wall and only the spout and handle(s) exposed. Sleek look; requires accurate rough-in and access for future service.
Stripping old wallpaper using steam, scoring tools, and chemical removers. Prep stage of most painting projects in older homes; budget 8–16 hours per room.
A primer applied before installing new wallpaper. Improves adhesion and allows easier removal during the next remodel.
A non-metallic or low-conductivity spacer between window panes. Reduces edge condensation and improves overall window U-factor by 10–15%.
Turfgrass species (Bermuda, Zoysia, St. Augustine, Centipede) that grow most actively in summer when soil temperatures are 70–90°F. Dormant and brown in winter in all but the most tropical climates.
A contractor's commitment to repair defects in their work for a specified period — typically 1 year for labor. Manufacturer product warranties cover materials separately (shingles: 30 years, appliances: 1–5 years, windows: lifetime).
A wide-beam fixture washing surfaces (walls, large plants) with even light. Used to highlight architecture and create depth.
Front-load washers are more energy- and water-efficient but require cleaning the door seal to prevent mold. Top-load high-efficiency models eliminate the agitator for gentler fabric care. Both require a dedicated 120V/20A circuit.
A decorative element — fountain, pond, waterfall, or rill — that adds sound and visual interest to an outdoor space. Requires recirculating pump, liner, and potentially filtration. Professional installation prevents leaks and electrical hazards.
A banging noise in pipes when water flow is suddenly stopped — caused by the pressure wave from valve closure. Solved by water hammer arrestors or air chambers. Chronic water hammer can damage valves and joints.
A small piston or air-cushion device that absorbs the pressure shockwave when a fast-closing valve (washer, dishwasher) stops water flow. Eliminates banging pipe noise.
An appliance that heats and stores (tank) or heats on-demand (tankless) hot water for domestic use. Gas models heat water twice as fast as electric. Heat pump water heaters are the most efficient option, qualifying for federal tax credits.
The valve — typically at the street or near the foundation — that stops all water flow to the home. Every homeowner should know the location. Closing the main is the first step in any plumbing emergency.
The utility-installed device that measures water consumption in cubic feet or gallons. Located at the curb or in a pit near the street. The main shut-off and pressure-reducing valve are typically nearby.
The force of water moving through supply pipes, measured in psi (pounds per square inch). Ideal range: 40–80 psi. Over 80 psi can damage fixtures and cause leaks. A pressure-reducing valve (PRV) controls high utility pressure.
An ion-exchange device that removes calcium and magnesium hardness from water using salt regeneration. Eliminates scale buildup in pipes, fixtures, and water-using appliances.
Brown or yellow ceiling and wall stains indicating past or present water infiltration from a roof, plumbing, or HVAC leak. Identify and fix the source before covering — painting over active leaks is counterproductive.
The upper surface of the saturated zone of groundwater in the soil. High water tables increase hydrostatic pressure on foundations and require more robust waterproofing and drainage systems.
Lab analysis of well water for bacteria (coliform, E. coli), nitrates, lead, arsenic, hardness, and pH. Required at home purchase in some states; recommended annually for active wells.
A site finish that dries clear, low-odor, and in 2–4 hours per coat. Less durable than oil-based historically, but modern formulas (Bona Traffic HD) match or exceed oil-based wear.
A backup sump pump using municipal water pressure to drive an ejector (no electricity required). Wastes water during use but never fails from dead battery; not allowed on well systems.
A countertop design where the stone material extends vertically down the side of an island or cabinet, creating a continuous flowing appearance. Popular in contemporary kitchens using quartz or marble slabs.
A countertop edge continuing down the side of an island to the floor. Modern, premium look; doubles material cost for that side.
A traffic-bearing waterproof membrane system (Duradek, Neogard) applied to horizontal concrete or wood decks to prevent water infiltration. Required on decks over conditioned living space — a standard roofing application.
An EPA-labeled toilet that uses 1.28 GPF or less while passing MaP solid-waste tests. Many utilities offer rebates of $50–$200 per toilet replacement.
A wax seal between toilet base and closet flange. Standard or extra-thick versions match floor heights. Replace anytime a toilet is reset; no-wax foam alternatives are gaining acceptance.
Wood-Destroying Organism inspection — a professional assessment for termites, carpenter ants, wood-boring beetles, and wood decay fungi. Required by most lenders in termite-prone states (California, Texas, Southeast, Gulf Coast).
The clear protective top layer of LVP and engineered flooring. Measured in mils (thousandths of an inch) — 6 mil is basic residential; 12 mil is commercial residential; 20 mil is commercial-grade and ideal for pets.
The clear top layer of LVP that protects against scratches and wear. Residential 6–12 mil; light commercial 20 mil; heavy commercial 28+ mil. Higher mil = longer warranty.
The thickness of the real-wood top on engineered hardwood. 2mm allows one refinish; 4mm allows 2–3; 6mm acts like solid wood for refinishing purposes.
Generic term for housewrap, peel-and-stick membranes, or fluid-applied WRBs. The water-shedding layer in the building envelope.
An outlet rated for outdoor and wet location use. Marked 'WR'; required for any outdoor receptacle by 2008 NEC.
A weatherproof fitting at the top of a service mast where overhead utility conductors enter the conduit. Drip loops below the weatherhead prevent water from following wires into the panel.
Compressible sealing material installed around door and window frames to prevent air and water infiltration. Types include foam tape, V-strip, door sweeps, bulb gaskets, and magnetic seals. Replace when worn or compressed.
Foam, rubber, or vinyl seals around door perimeter. Replace every 5–10 years; the single biggest air-leakage source on most exterior doors.
A small opening at the base of a brick veneer wall, retaining wall, or window frame that allows trapped water to drain outward. Should never be blocked — clogged weep holes lead to water damage and efflorescence.
A grid of welded steel wires used as concrete reinforcement. Cheaper than rebar for slabs; typically 6"×6" 10/10 gauge for residential slabs.
A bar area with a sink and plumbing rough-in, allowing serving drinks without trips to the kitchen. Requires a water supply line and drain connection. Popular in basements, entertainment rooms, and home theaters.
Keeping concrete continuously moist for 7+ days after pour. Maximizes ultimate strength; often replaced by curing compounds in modern residential.
Maintaining a wet edge by always painting back into recently applied paint. Prevents lap marks; most important on flat finishes and large surfaces.
A pipe that serves as both drain and vent for upstream fixtures. Allowed by code in specific configurations to reduce vent piping in tight spaces.
A short flexible-conduit assembly connecting an outdoor disconnect to an air-conditioning unit. Sized to match unit nameplate amperage and equipment grounding requirements.
A bathtub with jets powered by a recirculating pump that creates a hydrotherapy effect. Requires a dedicated 20A GFCI-protected circuit. Jets must be cleaned regularly to prevent mold and biofilm buildup.
Networked speakers (Sonos, Sonance, Heos) playing synchronized or zone-independent music. Premium installations include in-wall and in-ceiling speakers.
A battery or generator system sized to power every circuit in the panel during an outage. Typically requires 2+ Powerwalls or a 22kW+ standby generator with smart load management.
A large-capacity lithium battery storage system (Tesla Powerwall, Enphase IQ, Franklin sFPWRwall) that stores solar energy or grid power for use during outages or peak-rate periods. Typical capacity: 10–15 kWh per unit.
A permanently installed standby generator that automatically powers a home during utility outages. Connected via automatic transfer switch. Runs on natural gas or propane. 22kW is typical for whole-home coverage.
A ducted dehumidifier integrated with the HVAC system that pulls moisture from indoor air independent of the AC. Effective in humid climates where AC alone can't keep RH below 55%. Typical cost $1,800–$3,500 installed.
A large attic fan that pulls cool night air through open windows and exhausts hot attic air. Cuts AC runtime in dry climates with cool nights. Cost: $800–$2,000 installed; payback 3–7 years.
A bypass, fan-powered, or steam humidifier installed in the duct system. Adds moisture during heating season to maintain 30–40% RH and prevent dry air symptoms (cracked wood, static, dry skin).
A surge-protective device installed at the main panel that clamps voltage spikes before they reach branch circuits. Required by 2020 NEC on dwelling units. Replace after major lightning events.
A point-of-entry filter that removes sediment, chlorine, or other contaminants from all incoming water. Sized by GPM and contaminant; service intervals vary from 6 months to 5 years.
Hardwood flooring 5–12 inches wide. Modern aesthetic; more dimensional movement than narrow strip — engineered construction recommended for stability.
A 3-piece sink faucet with handles that mount 6–16 inches apart, connected with flexible tubing under the sink. Higher-end aesthetic; allows custom handle placement in stone counters.
A wireless security camera (Ring, Nest, Arlo). Easier install than POE; subject to WiFi outages; battery models require recharging.
Lifted, creased, or missing shingles caused by high winds. Insurance often covers wind damage; document with photos before any repairs.
Manufacturer wind warranty — typically 110, 130, or 150 mph. Achieving the rating requires nailing pattern, sealant activation, and proper underlayment per the manufacturer spec.
A factory-charged AC unit installed in a window or wall sleeve. Modern inverter window units rival central AC efficiency in single rooms. Typical cost $250–$700 for 8,000–14,000 BTU.
Professional cleaning of interior and exterior window glass, frames, and tracks. High-rise and multi-story window cleaning requires special equipment and insurance. Annual professional cleaning prevents hard water spot etching.
A thin laminate applied to existing glass to add solar control, privacy, safety, or decorative effects without window replacement. Security film holds broken glass together; solar control film reduces heat gain by 50–70%.
An adhesive tinted or reflective film applied to glass. Reduces solar heat gain 30–60%; eligible for some efficiency tax credits.
Condensation forming between double-pane glass layers indicates seal failure — the insulating gas has escaped. The window unit should be replaced; resealing is not cost-effective. Foggy windows reduce insulating performance significantly.
A clear shrink-film applied with double-stick tape. Adds R-1 by creating a dead-air gap; budget winter weatherization for old single-pane windows.
A new window installed inside the existing frame. Cheaper and faster than full-frame; reduces glass area by 1–2 inches and locks you to the original frame condition.
The framed glass that opens or stays fixed within a window's frame. Damaged sashes can sometimes be replaced without replacing the whole window.
A security sensor with a magnet and reed switch that detects when a window (or door) is opened. One of the most reliable and economical security components. Requires no power when closed — only triggers alarm on separation.
Decorative wood molding around the interior of a window. Common styles: Craftsman 4-piece, Colonial 2-piece, modern flat stock with no rosettes.
A measure of heat flow through a complete window assembly (glass plus frame) — lower is better. Energy Star-certified windows for the Northern Zone require U-factor ≤ 0.27. Compare U-factors when shopping for replacement windows.
A U-shaped retaining structure (metal or plastic) installed against a below-grade basement wall to create an open area outside an egress or below-grade window. Requires drainage gravel at the bottom to prevent water buildup.
A clear or opaque cover over a basement window well to keep out leaves, water, and rodents. Required to be openable from inside if covering an egress well.
The maximum current a conductor can safely carry. 14 AWG copper is rated 15A; 12 AWG is 20A; 10 AWG is 30A; 8 AWG is 50A; 6 AWG is 65A. Derate for temperature and conduit fill.
A grid of steel wires welded at intersections, used to reinforce concrete slabs. Reduces cracking from shrinkage and temperature changes. Should be positioned in the middle third of the slab thickness, not on the ground.
A twist-on connector that joins multiple solid copper conductors. Color codes (yellow, red, gray) indicate wire-size capacity. Must be tightened firmly so no bare copper is exposed.
A hand tool that removes the insulation from electrical wire without damaging the conductor. Proper stripping length (3/4" for outlets, screw terminals) ensures good electrical connections.
A traditional 16-volt transformer-powered doorbell. Required infrastructure for hardwired smart doorbells; battery-powered alternatives available for non-wired homes.
An oxalic acid solution that restores graying outdoor wood. Apply, scrub, and rinse before staining or sealing for like-new appearance.
An EPA test certifying a wood stove emits less than 2.5 grams of particulates per hour. Required on all new wood stoves sold in the U.S. since 2020.
A traditional window with solid wood frames. Premium aesthetic; needs ongoing maintenance — paint, putty, weatherproofing — to last beyond 20 years.
A boiler that burns cordwood or pellets for hydronic heat. Outdoor wood boilers can heat multiple buildings but face increasing EPA emissions regulations. Indoor wood boilers must vent to a Class A chimney.
A natural-fiber carpet with excellent flame resistance and resilience. Premium pricing ($15–$40+ per sq ft installed); requires special cleaning chemistry.
Completing construction, electrical, plumbing, or mechanical work without required permits. Creates liability issues when selling (lenders won't finance), safety concerns, and potential requirements to remove or expose all unpermitted work.
Insurance covering contractor employees for work-related injuries — preventing the homeowner from being personally liable if a worker is hurt on their property. Verify the contractor carries it before allowing anyone on the jobsite.
A warranty by the installing contractor covering installation defects — typically 1, 2, 5, or 10 years. Separate from the manufacturer's material warranty.
A modern sink with integrated cutting boards, drying racks, and accessories that slide along ledges built into the basin. Premium kitchen feature.
A valley where shingles from each slope are interwoven across the centerline. Older method; less common today than closed-cut valleys.
Wood Plastic Composite — a softer core in older LVP that's more comfortable underfoot but dents more easily than SPC. Largely replaced by SPC in current product lines.
Wood Plastic Composite luxury vinyl plank — a hybrid flooring with a foamed plastic core that's waterproof, quieter underfoot, and more cushioned than rigid SPC core LVP. Slightly less dent-resistant than SPC core.
A drainage fitting where one branch enters at 45°. Used for horizontal-to-horizontal connections to maintain solids flow. Combined with a 1/8 bend for direction changes in horizontal sewer runs.
Landscape design using drought-tolerant plants, efficient irrigation, and minimal lawn. Cuts water use 50–75%; required by code in some Western municipalities.
Extruded Polystyrene — pink, blue, or green foam (Foamular, Styrofoam). R-5 per inch; moisture-resistant; used below grade and in flood-prone applications.
A surface drain in a landscape designed to capture runoff. Tied into french-drain piping or a piped storm system to direct water away from the foundation.
A wireless mesh protocol for smart-home devices operating at 908 MHz (US). Established ecosystem with broad device support; fading vs. Matter and Thread.
A factory-built fireplace system that can be safely installed adjacent to combustible materials — no masonry surround required. Dramatically less expensive than site-built masonry fireplaces. Available in gas and wood-burning versions.
A wireless mesh protocol for smart-home devices at 2.4 GHz. Used by Hue and SmartThings; competes with Z-Wave; both being subsumed by Matter.
A defective electrical panel brand from the 1970s–80s with bus bars that overheat and breakers that may not trip. Replacement is recommended; some insurers refuse to cover homes with active Zinsco panels.
Huber's OSB sheathing with integrated weather-resistive coating. Eliminates separate housewrap; tape all seams with Zip System tape for waterproofing.
A motorized valve that opens or closes a hydronic loop in response to thermostat calls. Less expensive than multiple circulators for multi-zone systems but slower to respond.
Dividing a home into separately controlled temperature areas using multiple thermostats, zone dampers, or mini-split units. Prevents heating and cooling rooms that are unoccupied and improves comfort in multi-story homes.
Local government regulations that determine how property can be used — residential, commercial, industrial — and set rules on building height, setbacks, lot coverage, and accessory structures. Verify zoning before planning any addition or ADU.
A multi-thermostat, multi-zone system using motorized dampers to deliver different temperatures to different areas of a home independently. Reduces energy waste from conditioning unoccupied rooms.
Permission granted by the local zoning board to deviate from a specific zoning requirement — setback, height, lot coverage, or use. A variance application requires demonstrating hardship and may include a public hearing.
A warm-season grass with finer texture than Bermuda. Slow to establish; once established, dense and weed-resistant.
No terms match these filters.
Choose a trade to describe your project and request estimates. Review each contractor's credentials and confirm their service area before hiring.
Browse contractor profiles and review their experience, submitted credentials, and service details before deciding who to contact.
Find Local Pros