Asphalt Shingles

Two types of base materials are used to make asphalt shingles, organic and fiberglass. Both are made in a similar manner, with an asphalt-saturated base covered on one or both sides with asphalt or modified-asphalt, the exposed surface impregnated with slate, schist, quartz, vitrified brick, stone or ceramic granules, and the under-side treated with sand, talc or mica to prevent shingles from sticking to one-another before use.