Asphalt Shingles

Asphalt shingles are composed of the following: 1) a base material, either organic felt or glass-fiber mat, that provides support for the weather-resistant components and gives a shingle strength; 2) asphalt and fillers; 3) surfacing material, generally in the form of mineral granules, that provides protection from impact and UV degradation and improves fire resistance. Shingles may be produced in a single layer or two or more layers. The latter generally are known as laminated strip shingles, or architectural shingles, and they have a three dimensional appearance.