Copy of `PMEL - roofing glossary`

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PMEL - roofing glossary
Category: Architecture and Buildings > Roofing glossary
Date & country: 01/09/2008, USA
Words: 414


accelerator
Any material added to stucco, plaster or mortar which speeds up the natural set.

aama
Architechtural Aluminum Manufacturer`s Association.

conduction
The flow of heat from one part of a substance to another part. A piece of iron with one end placed in a fire will soon become warm from end to end, from the transfer of heat by the actual collision of the air molecules.

Nesting
A method of reroofing with new asphalt shingles over old shingles in which the top edge of the new shingle is butted against the bottom edge of the existing shingle tab.

Algae discoloration
A type of roof discoloration caused by algae.Commonly called fungus growth.

conductor
(1) In roofing, a pipe for conveying rain water from the roof gutter to a drain, or from a roof drain to the storm drain; also called a leader, downspout, or downpipe. (2) In electrical contracting, a wire through which a current of electricity flows, better known as an electric wire.

Vent sleeve
  See collar.

Woven Valley
  Method of valley construction in which shingles from both sides of the valley extend across the valley and are woven together by overlapping alternate courses as they are applied. The valley flashing is not exposed.

Mineral-surfaced roofing
  Asphalt shingles and roll roofing that are covered with granules.

Mineral stabilizers
  Finely ground limestone, slate, traprock or other inert materials added to asphalt coatings for durability and increased resistance to fire and weathering.

conduit
A tube for protecting electric wires.

construction loan
A loan provided by a lending institution specifically to construct or renovate a building.

convection
A method of transferring heat by the actual movement of heated molecules, usually by a freestanding unit such as a furnace.

control joint
A control joint controls or accommodates movement in the surface component of a roof.