A conductor made of aluminum for carrying electricity. Aluminum is generally limited to the larger wire sizes. Due to its lower conductivity, aluminum wire smaller than No. 12 is not made. Aluminum is lighter and less expensive than copper, but…
A sum of money set aside in the construction contract for items which have not been selected and specified in the construction contract. Best kept to a minimum number and used for items whose choice will not impact earlier stages…
The distance between two supporting points for load bearing lumber such as joists, rafters or a girder.
A condition of paint or aged asphalt brought about by the loss of volatile oils and the oxidation caused by solar radiation. Causes a coarse checking pattern characterized by a slipping of the new paint coating over the old coating…
Microorganisms that may grow to colonies in damp environments, including certain rooftops. They can discolor shingles. Often described as "fungus."
Warning devices, installed or free-standing, including but not limited to
A space between roof insulation and roof boards provided for movement of air.
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…
The area between insulation facing and interior of exterior wall coverings. Normally a 1" air gap.
The amount of air leaking in and out of a building through cracks in walls, windows and doors.