The Asphalt Shingle’s Components
Asphalt shingles are made from four basic materials:
% by weight
♦ fiberglass or cellulose felt backing: 2-15%
♦ asphalt cement: 19-36%
(on a fiberglass matt base: 19-22%)
(on a cellulose felt base: 30-36%)
♦ mineral granules (aggregate): 20-38%
♦ mineral filler/stabilizer: 8-40%