Glossary of terms used on this site
There are 161 entries in this glossary.
| Term |
Definition |
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AAMA
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American Architectural Manufacturers Association
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Absorption
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The act or process of retaining foreign particles such as gas or liquid without transmission of these particles.
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ACI
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American Concrete Institute
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Acid Etch
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(1) The use of a strong acid to remove the surface of concrete thereby exposing the aggregate. (2) The use of a strong acid to etch the surface of material such as metal in order for that material to accept a primer or Spray Polyurethane Foam.
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ACIL
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American Council of Independent Laboratories
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Acrylic Coating
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A coating system with an acrylic resin base.
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Acrylic Resin
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Polymers of acrylic or methacrylic monomers often used as a latex base for coating systems.
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Active
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Will corrode in the presence of moisture or a "noble" metal.
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Adhere
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The clinging of one surface to another; either molecularly or otherwise.
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AGC
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Associated General Contractors of America
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Aggregate
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A surfacing or ballast for a roof system. Aggregate can be rock, stone, crushed stone or slag, water-worn gravel, crushed lava rock or marble chips.
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Algae discoloration
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A type of roof discoloration caused by algae, also called fungus growth.
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Alligatoring
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Alligatoring is term used to describe the cracking of surfacing bitumen on a built-up roof. These cracks are the result of the limited tolerance of asphalt to thermal expansion or contraction, and produce a pattern that resembles an alligator's hide.
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Asphalt shingle
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a shingle manufactured by coating a reinforcing material (felt or fibrous glass mat) with asphalt and having mineral granules on the side exposed to the weather.
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