All composition shingles are made with asphalt. The difference is the mat, which is inside of the shingle. The mat holds everything together. Inside of a “fiberglass” shingle there is a spun fiberglass mat and inside an “asphalt” shingle there is what is called an organic mat. The organic mat is very similar to a piece of cardboard. Both types of shingles are made with asphalt, the difference is what the asphalt is attached to.
What’s the difference in asphalt and fiberglass?