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Glossary of Home Building Terms



ABS. A type of black plastic pipe commonly used for waste water lines

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

A/C condenser. The outside fan unit of the air conditioning system; removes the heat from the freon gas and turns the gas back into a liquid, then pumps the liquid back to the coil in the furnace

A/C disconnect. The main electrical ON-OFF switch near the A/C condenser

APA Plywood. (American Plywood Association) Plywood that has been rated by the American Plywood Association (e.g., number one APA-rated exterior plywood contains no voids between laminate layers)

appraisal. An expert valuation of property

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

aggregate. A mixture of sand and stone and a major component of concrete

air chamber. - A vertical, air filled pipe that prevents water hammer by absorbing pressure when water is shut off at a faucet or valve

air-dried lumber. Lumber that has been piled in yards or sheds for any length of time; in the U.S, the minimum moisture content of thoroughly air- dried lumber is 12 to 15 percent, and the average is somewhat higher; in the southern states, air-dried lumber may be no lower than 19 percent

air space . The area between insulation facing and interior of exterior wall coverings; normally a one-inch air gap

airway. A space between roof insulation and roof boards which allows air movement

algae. Microorganisms that may grow to colonies in damp environments, including certain rooftops; can discolor shingles

alligatoring. Coarse checking pattern characterized by a slipping of the new paint coating over the old coating to the extent that the old coating can be seen through the fissures

allowance. A sum of money set aside in the construction contract for items which have not been selected and specified in the construction contract (e.g., 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

amperage or AMPS. a unit of electrical current or volume; most homes have an electrical service entrance package of 125 or 200 amps, while some older homes have 60 or 100 amp entrances

anchor bolts. Bolts to secure a wooden sill plate to concrete, 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

apron. The flat member of the inside trim of a window placed against the wall immediately beneath the stool.

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.

areaway. An open subsurface space adjacent to a building used to admit light or air or as a means of access to a basement.

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

asphalt. Most native asphalt is a residue from evaporated petroleum; insoluble in water; used widely in building for waterproofing roof coverings of many types, exterior wall coverings, flooring tile, etc.

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 rather than obtaining a new loan

astragal. A molding, attached to one of a pair of swinging 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. a screened opening provided to ventilate an attic space; typically located in the soflit area as inlet ventilators and in the gable end or along the ridge as outlet ventilators; can also consist of power-driven fans used as an exhaust system

 


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