Has a base mat of glass fibers covered with ceramic-coated mineral granules.- Some types may use a polyester or fiberglass blend for the base mat.
- An inorganic shingle.
- Features a better fire rating and often has a longer warranty than other types of shingles.
- Does not absorb water and resists cracking.
- Most come with seal-down strips. These are most effective when applied in warm weather, which allows the asphalt in the strip to soften and adhere to the next shingle.
- An inorganic-based shingle usually has a Class A fire resistance rating from the Underwriters Laboratories (UL). UL also tests for shingle performance in high winds. To qualify for the wind-resistance label, shingles must withstand test winds of at least 60 mph for two hours without a single tab lifting.
Fiberglass Asphalt Shingle
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