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Remodeling Terminology & Definitions · A

The following is a list of industry related terminology which we thought might be helpful to both homeowners and professionals alike. Definitions will be continually added to this list.
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air-dried lumber
Lumber that has been piled in yards or sheds for any length of time. For the United States as a whole, the minimum moisture content of thoroughly air-dried lumber is 12 to 15 percent and the average is somewhat higher. In the South, air-dried lumber may be no lower than 19 percent.
airway
A space between roof insulation and roof boards for movement of air.
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.
anchor bolts
Bolts to secure a wooden sill plate to concrete or masonry floor or wall.
apron
The flat member of the inside trim of a window placed against the wall immediately beneath the stool.
areaway
An open subsurface space adjacent to a building used to admit light or air or as a means of access to a basement.
argon
An inert, nontoxic gas used in insulating glass units to reduce heat transfer.
asphalt
Most native asphalt is a residue from evaporated petroleum. It is insoluble in water but soluble in gasoline and melts when heated. Used widely in building for waterproofing roof coverings of many types, exterior wall coverings, flooring tile, and the like.
astragal
A molding, attached to one of a pair of swinging doors, against which the other door strikes.
attic ventilators
In houses, screened openings provided to ventilate an attic space. They are located in the soffit area as inlet ventilators and in the gable end or along the ridge as outlet ventilators. They can also consist of power-driven fans used as an exhaust system. (See also Louver.)

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