What Fiberglass Shingles are Made Of Have you ever thought about what goes into the shingles that go onto your roof? Shingle technology is what enables your roof to last up to 20 years, despite the sun, rain, and wind. Although fiberglass shingles, often called asphalt shingles, are the most common roofing material used in Minnesota, they are hi-tech engineering. The Fiberglass Base In the old days of shingle manufacturing, shingles were made by saturating cellulose with asphalt. This wasn’t very durable. So, for the past few decades, the standard has been to use fiberglass. Each shingle’s base is a mat of uniformly dispersed fine glass fibers held together by a binder. This fiberglass mat must be strong enough to last the guaranteed lifetime of the shingle. This mat is the foundation upon which the...
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