A/C - An abbreviation for air conditioner or air conditioning.

A/C Condenser - The outside fan unit of the Air Conditioning system. It removes the heat from the Freon gas and "turns" the gas back into a liquid and pumps the liquid back to the coil in the furnace.

A/C Disconnect - The main electrical ON-OFF switch near the A/C Condenser.

Aerator - The round screened screw-on tip of a sink spout. It mixes water and air for a smooth flow.

Aggregate - A mixture of sand and stone and a major component of concrete.

Air space - The area between insulation facing and interior of exterior wall coverings. Normally a 1" air gap.

Allowance(s) - A sum of money set aside in the construction contract for items which have not been selected and specified in the construction contract. For example, selection of tile as a flooring may require an allowance for an underlayment material, or an electrical allowance which sets aside an amount of money to be spent on electrical fixtures.

Amortization - A payment plan by which a loan is reduced through monthly payments of principal and interest.

Anchor bolts - Bolts to secure a wooden sill plate to concrete, or masonry floor or wall.

Annual Percentage Rate (APR) - Annual cost of credit over the life of a loan, including interest, service charges, points, loan fees, mortgage insurance, and other items.

Appraisal - An expert valuation of property.

Apron - A trim board that is installed beneath a window sill.

Architect - One who has completed a course of study in building and design, and is licensed by the state as an architect. One who draws up plans.

Area wells - Corrugated metal or concrete barrier walls installed around a basement window to hold back the earth.

Assessment - A tax levied on a property, or a value placed on the worth of a property.

Assumption - Allows a buyer to assume responsibility for an existing loan instead of getting a new loan.

Astragal - A molding, attached to one of a pair of swinging double doors, against which the other door strikes.

Attic access - An opening that is placed in the drywalled ceiling of a home providing access to the attic.

Attic Ventilators - In houses, screened openings provided to ventilate an attic.

Back Charge - Billings for work performed or costs incurred by one party that, in accordance with the agreement, should have been performed or incurred by the party to whom billed. Owners bill back charges to general contractors, and general contractor’s bill back charges to subcontractors. Examples of back charges include charges for cleanup work or to repair something damaged by another subcontractor, such as a tub chip or broken window.

Backfill - The replacement of excavated earth into a trench around or against a basement /crawl space foundation wall.

Backing - Frame lumber installed between the wall studs to give additional support for drywall or an interior trim related item, such as handrail brackets, cabinets, and towel bars. In this way, items are screwed and mounted into solid wood rather than weak drywall that may allow the item to break loose from the wall. Carpet backing holds the pile fabric in place.

Blackout - Work the framing contractor does after the mechanical subcontractors (Heating-Plumbing-Electrical) finish their phase of work at the rough (before insulation) stage to get the home ready for a municipal frame inspection. Generally, the framing contractor repairs anything disturbed by others and completes all framing necessary to pass a Rough Frame Inspection.

Ballast - A transformer that steps up the voltage in a florescent lamp.

Balloon - A loan that has a series of monthly payments with the remaining balance due in a large lump sum payment at the end.

Balloon framed wall - Framed walls (generally over 10' tall) that run the entire vertical length from the floor sill plate to the roof. This is done to eliminate the need for a gable end truss.

Balusters - Vertical members in a railing used between a top rail and bottom rail or the stair treads. Sometimes referred to as 'pickets' or 'spindles'.

Balustrade - The rail, posts and vertical balusters along the edge of a stairway or elevated walkway.

Barge - Horizontal beam rafter that supports shorter rafters.

Barge board - A decorative board covering the projecting rafter (fly rafter) of the gable end. At the cornice, this member is a fascia board.

Base or baseboard - A trim board placed against the wall around the room next to the floor.

Basement window inserts - The window frame and glass unit that is installed in the window buck.

Base shoe - Molding used next to the floor on interior base board. Sometimes called a carpet strip.

Bat - A half-brick.

Batt - A section of fiber-glass or rock-wool insulation measuring 15 or 23 inches wide by four to eight feet long and various thicknesses.  Sometimes "faced" (meaning to have a paper covering on one side) or "unfaced" (without paper).

Batten - Narrow strips of wood used to cover joints or as decorative vertical members over plywood or wide boards.

Bay window - Any window space projecting outward from the walls of a building, either square or polygonal in plan.

Beam - A structural member transversely supporting a load. A structural member carrying building loads (weight) from one support to another. Sometimes called a "girder".

Bearing partition - A partition that supports any vertical load in addition to its own weight.

Bearing point - A point where a bearing or structural weight is concentrated and transferred to the foundation.

Bearing wall - A wall that supports any vertical load in addition to its own weight.

Bearing header - (a) A beam placed perpendicular to joists and to which joists are nailed in framing for a chimney, stairway, or other opening. (b) A wood lintel. (c) The horizontal structural member over an opening (for example over a door or window).

Bedrock - A subsurface layer of earth that is suitable to support a structure.

Bid - A formal offer by a contractor, in accordance with specifications for a project, to do all or a phase of the work at a certain price in accordance with the terms and conditions stated in the offer.

Bid bond - A bond issued by a surety on behalf of a contractor that provides assurance to the recipient of the contractor's bid that, if the bid is accepted, the contractor will execute a contract and provide a performance bond. Under the bond, the surety is obligated to pay the recipient of the bid the difference between the contractor's bid and the bid of the next lowest responsible bidder if the bid is accepted and the contractor fails to execute a contract or to provide a performance bond.

Bid security Funds or a bid bond - submitted with a bid as a guarantee to the recipient of the bid that the contractor, if awarded the contract, will execute the contract in accordance with the bidding requirements of the contract documents.

Bid shopping - A practice by which contractors, both before and after their bids are submitted, attempt to obtain prices from potential subcontractors and material suppliers that are lower than the contractors' original estimates on which their bids are based, or after a contract is awarded, seek to induce subcontractors to reduce the subcontract price included in the bid.

Bidding requirements - The procedures and conditions for the submission of bids. The requirements are included ion documents, such as the notice to bidders, advertisements for bids, instructions to bidders, invitations to bid, and sample bid forms.

Bifold door - Doors that are hinged in the middle for opening in a smaller area than standard swing doors. Often used for closet doors.

Binder - A receipt for a deposit to secure the right to purchase a home at agreed terms by a buyer and seller.

Bipass doors - Doors that slide by each other and commonly used as closet doors.

Blankets - Fiber-glass or rock-wool insulation that comes in long rolls 15 or 23 inches wide.

Blocked (door blocking) - Wood shims used between the door frame and the vertical structural wall framing members.

Blocked (rafters) - Short "2 by 4's" used to keep rafters from twisting, and installed at the ends and at mid-span.

Blocking - Small wood pieces to brace framing members or to provide a nailing base for gypsum board or paneling.

Block out - To install a box or barrier within a foundation wall to prevent the concrete from entering an area. For example, foundation walls are sometimes "blocked" in order for mechanical pipes to pass through the wall, to install a crawl space door, and to depress the concrete at a garage door location.

Blow insulation - Fiber insulation in loose form and used to insulate attics and existing walls where framing members are not exposed.

Blue print(s) - A type of copying method often used for architectural drawings. Usually used to describe the drawing of a structure which is prepared by an architect or designer for the purpose of design and planning, estimating, securing permits and actual construction.

Blue stake - Another phrase for Utility Notification. This is when a utility company (telephone, gas, electric, cable TV, sewer and water, etc) comes to the job site and locates and spray paints the ground and/or installs little flags to show where their service is located underground.

Board foot - A unit of measure for lumber equal to 1 inch thick by 12 inches wide by 12 inches long. Examples: 1" x 12" x 16' = 16 board feet, 2" x 12" x 16' = 32 board feet.

Bond or bonding - An amount of money (usually $5,000-$10,000) which must be on deposit with a governmental agency in order to secure a contractor's license. The bond may be used to pay for the unpaid bills or disputed work of the contractor. Not to be confused with a 'performance bond'. Such bonds are rarely used in residential construction; they are an insurance policy which guarantees proper completion of a project.

Boom - A truck used to hoist heavy material up and into place. To put trusses on a home or to set a heavy beam into place.

Bottom chord - The lower or bottom horizontal member of a truss.

Bottom plate - The "2 by 4's or 6's" that lay on the subfloor upon which the vertical studs are installed. Also called the 'sole plate'.

Brace - An inclined piece of framing lumber applied to wall or floor to strengthen the structure. Often used on walls as temporary bracing until framing has been completed.

Breaker panel - The electrical box that distributes electric power entering the home to each branch circuit (each plug and switch) and composed of circuit breakers.

Brick ledge - Part of the foundation wall where brick (veneer) will rest.

Brick lintel - The metal angle iron that brick rests on, especially above a window, door, or other opening.

Brick mold -Trim used around an exterior door jamb that siding butts to.

Brick tie - A small, corrugated metal strip @ 1" X 6"- 8" long nailed to wall sheeting or studs. They are inserted into the grout mortar joint of the veneer brick, and hold the veneer wall to the sheeted wall behind it.

Brick veneer - A vertical facing of brick laid against and fastened to sheathing of a framed wall or tile wall construction.

Bridging - Small wood or metal members that are inserted in a diagonal position between the floor joists or rafters at mid-span for the purpose of bracing the joists/rafters & spreading the load.

Buck - Often used in reference to rough frame opening members. Door bucks used in reference to metal door frame. See Window Bucks

Builder's Risk Insurance - Insurance coverage on a construction project during construction, including extended coverage that may be added for the contract for the customer's protections.

Building codes - Community ordinances governing the manner in which a home may be constructed or modified.

Building insurance - Insurance covering the structure of the building.

Building paper - A general term for papers, felts, and similar sheet materials used in buildings without reference to their properties or uses. Generally comes in long rolls.

Built-up roof - roofing composed of three to five layers of asphalt felt laminated with coal tar, pitch, or asphalt. The top is finished with crushed slag or gravel. Generally used on flat or low-pitched roofs.

Bull nose (drywall) - Rounded drywall corners.

Bundle - A package of shingles. Normally, there are 3 bundles per square and 27 shingles per bundle.

Butt edge - The lower edge of the shingle tabs.

Butt hinge - The most common type. One leaf attaches to the door's edge, the other to its jamb.

Butt joint - The junction where the ends of two timbers meet, and also where sheets of drywall meet on the 4 foot edge. To place materials end-to-end or end-to-edge without overlapping.

Buy down - A subsidy (usually paid by a builder or developer) to reduce monthly payments on a mortgage.

By fold door - Doors that are hinged in the middle for opening in a smaller area than standard swing doors. Often used for closet doors.

By pass doors - Doors that slide by each other and commonly used as closet.

CO - An abbreviation for "Certificate of Occupancy". This certificate is issued by the local municipality and is required before anyone can occupy and live within the home. It is issued only after the local municipality has made all inspections and all monies and fees have been paid.

Caisson - A 10" or 12" diameter hole drilled into the earth and embedded into bedrock 3 - 4 feet. The structural support for a type of foundation wall, porch, patio, monopost, or other structure. Two or more "sticks" of reinforcing bars (rebar) are inserted into and run the full length of the hole and concrete is poured into the caisson hole.

Cantilever - An overhang. Where one floor extends beyond and over a foundation wall. For example at a fireplace location or bay window cantilever. Normally, not extending over 2 feet.

Cantilevered void - Foundation void material used in unusually expansive soils conditions. This void is "trapezoid" shaped and has vertical sides of 6" and 4" respectively.

Cap - The upper member of a column, pilaster, door cornice, molding, or fireplace.

Cap flashing - The portion of the flashing attached to a vertical surface to prevent water from migrating behind the base flashing.

Capital - The principal part of a loan, i.e. the original amount borrowed.

Capital and interest - A repayment loan and the most conventional form of home loan. The borrower pays an amount each month to cover the amount borrowed (or capital or principal) plus the interest charged on capital.

Capped rate - The mortgage interest rate will not exceed a specified value during a certain period of time, but it will fluctuate up and down below that level.

Casement - Frames of wood or metal enclosing part (or all) of a window sash. May be opened by means of hinges affixed to the vertical edges.

Casement Window - A window with hinges on one of the vertical sides and swings open like a normal door.

Casing - Wood trim molding installed around a door or window opening.

Caulking - (1) A flexible material used to seal a gap between two surfaces e.g. between pieces of siding or the corners in tub walls. (2) To fill a joint with mastic or asphalt plastic cement to prevent leaks.

CCA (Chromated Copper Arsenate) - A pesticide that is forced into wood under high pressure to protect it from termites, other wood boring insects, and decay caused by fungus.

Celotex ™ - Black fibrous board that is used as exterior sheething.

Ceiling joist - One of a series of parallel framing members used to support ceiling loads and supported in turn by larger beams, girders or bearing walls. Also called roof joists.

Cement - The gray powder that is the "glue" in concrete. Portland cement. Also, any adhesive.

Ceramic tile - A man-made or machine-made clay tile used to finish a floor or wall. Generally used in bathtub and shower enclosures and on counter tops.

CFM (cubic feet per minute) - A rating that expresses the amount of air a blower or fan can move. The volume of air (measured in cubic feet) that can pass through an opening in one minute.

Chair rail - Interior trim material installed about 3-4 feet up the wall, horizontally.

Chalk line - A line made by snapping a taut string or cord dusted with chalk. Used for alignment purposes.

Change order - A written document which modifies the plans and specifications and/or the price of the construction Contract.

Chase - A framed enclosed space around a flue pipe or a channel in a wall, or through a ceiling for something to lie in or pass through.

Chink - To install fiberglass insulation around all exterior door and window frames, wall corners, and small gaps in the exterior wall.

Chip Board - A manufactured wood panel made out of 1"- 2" wood chips and glue. Often used as a substitute for plywood in the exterior wall and roof sheathing. Also called OSB (Oriented Strand Board) or wafer board.

Circuit - The path of electrical flow from a power source through an outlet and back to ground.

Circuit Breaker - A device which looks like a switch and is usually located inside the electrical breaker panel or circuit breaker box. It is designed to (1) shut of the power to portions or all of the house and (2) to limit the amount of power flowing through a circuit (measured in amperes). 110 volt household circuits require a fuse or circuit breaker with a rating of 15 or a maximum of 20 amps. 220 volt circuits may be designed for higher amperage loads e.g. a hot water heater may be designed for a 30 amp load and would therefore need a 30 amp fuse or breaker.

Class "A" - Optimum fire rating issued by Underwriter's Laboratories on roofing. The building codes in some areas require this type of roofing for fire safety.

Class "C" - Minimum fire rating issued by the Underwriters' Laboratories for roofing materials.

Clean out - An opening providing access to a drain line. Closed with a threaded plug.

Clip ties - Sharp, cut metal wires that protrude out of a concrete foundation wall (that at one time held the foundation form panels in place).

Cold air return - The ductwork (and related grills) that carries room air back to the furnace for re-heating.

Collar - Preformed flange placed over a vent pipe to seal the roofing above the vent pipe opening. Also called a vent sleeve.

Collar beam - Nominal 1 or 2 inch thick members connecting opposite roof rafters. They serve to stiffen the roof structure.

Column - A vertical structural compression member which supports loads.

Combustion air - The duct work installed to bring fresh, outside air to the furnace and/or hot water heater. Normally 2 separate supplies of air are brought in: One high and One low.

Combustion chamber - The part of a boiler, furnace or woodstove where the burn occurs; normally lined with firebrick or molded or sprayed insulation.  

Compression web - A member of a truss system which connects the bottom and top chords and which provides downward support.

Compressor - A mechanical device that pressurizes a gas in order to turn it into a liquid, thereby allowing heat to be removed or added. A compressor is the main component of conventional heat pumps and air conditioners. In an air conditioning system, the compressor normally sits outside and has a large fan (to remove heat).

Concrete - The mixture of Portland cement, sand, gravel, and water. Used to make garage and basement floors, sidewalks, patios, foundation walls, etc. It is commonly reinforced with steel rods (rebar) or wire screening (mesh).

Concrete block - A hollow concrete 'brick' often 8" x 8" x 16" in size.

Concrete board - A panel made out of concrete and fiberglass usually used as a tile backing material.

Condensation - Beads or drops of water (and frequently frost in extremely cold weather) that accumulate on the inside of the exterior covering of a building. Use of louvers or attic ventilators will reduce moisture condensation in attics. A vapor barrier under the gypsum lath or dry wall on exposed walls will reduce condensation.

Condensing unit - The outdoor component of a cooling system. It includes a compressor and condensing coil designed to give off heat.

Conditions, Covenants, and Restrictions (CC and Rs) - The standards that define how a property may be used and the protections the developer makes for the benefit of all owners in a subdivision.

Conduction - The direct transfer of heat energy through a material.

Conductivity - The rate at which heat is transmitted through a material.

Conduit, electrical - A pipe, usually metal, in which wire is installed.

Construction Contract - A legal document which specifies the what-when-where-how-how much and by whom in a construction project.  A good construction contract will include:

·      The contractor’s registration number.

·      A statement of work quality such as 'Standard Practices of the Trades' or 'according to Manufacturers Specifications'.

·      A set of Blue Prints or Plans.

·      A construction timetable including starting and completion dates.

·      A set of Specifications.

·      A Fixed Price for the work, or a Time and Materials formula.

·      A Payment Schedule.

·      Any Allowances.

·      A clause which outlines how any disputes will be resolved.

·      A written Warrantee.

Construction drywall - A type of construction in which the interior wall finish is applied in a dry condition, generally in the form of sheet materials or wood paneling as contrasted to plaster.

Construction, frame - A type of construction in which the structural components are wood or depend upon a wood frame for support.

Continuity tester - A device that tells whether a circuit is capable of carrying electricity.

Contractor - A company licensed to perform certain types of construction activities. In most states, the general’s contractor's license and some specialty contractor's licenses require compliance with bonding, workmen's compensation and similar regulations. Some of the specialty contractor licenses involve extensive training, testing and/or insurance requirements. There are various types of contractors:

·      General contractor - responsible for the execution, supervision and overall coordination of a project and may also perform some of the individual construction tasks.

·      Remodeling contractor - a general contractor who specializes in remodeling work.

·      Specialty contractor - licensed to perform a specialty task e.g. electrical, side sewer, asbestos abatement.

·      Sub contractor - a general or specialty contractor who works for another general contractor.

Control joint - Tooled, straight grooves made on concrete floors to "control" where the concrete should crack.

Convection - Currents created by heating air, which then rises and pulls cooler air behind it.  Also see radiation.

Conventional loan - A mortgage loan not insured by a government agency (such as FHA or VA).

Convertibility - The ability to change a loan from an adjustable rate schedule to a fixed rate schedule.

Cooling load - The amount of cooling required to keep a building at a specified temperature during the summer, usually 78° F, regardless of outside temperature.

Coped - Removing the top and bottom flange of the end(s) of a metal I-beam. This is done to permit it to fit within, and bolted to, the web of another I-beam in a "T" arrangement.

Coped joint - Cutting and fitting woodwork to an irregular surface.

Corbel - The triangular, decorative and supporting member that holds a mantel or horizontal shelf.

Corner bead - A strip of formed sheet metal placed on outside corners of drywall before applying drywall 'mud'.

Corner boards - Used as trim for the external corners of a house or other frame structure against which the ends of the siding are finished.

Corner braces - Diagonal braces at the corners of the framed structure designed to stiffen and strengthen the wall.

Cornice - Overhang of a pitched roof, usually consisting of a fascia board, a soffit and appropriate trim moldings.

Counter flashing - A metal flashing usually used on chimneys at the roofline to cover shingle flashing and used to prevent moisture entry.

Counterfort - A foundation wall section that strengthens (and generally perpendicular to) a long section of foundation wall.

Course - A row of shingles or roll roofing running the length of the roof. Parallel layers of building materials such as bricks, or siding laid up horizontally.

Cove molding - A molding with a concave face used as trim or to finish interior corners.

Crawl space - A shallow space below the living quarters of a house, normally enclosed by the foundation wall and having a dirt floor.