Asphalt shingles are one of the most popular roofing materials. Many choose it over other types simply because it's easier to install and very economical, not to mention for its proven resistance against strong winds. Asphalt shingles come either in organic or fiberglass material. Organic contains more asphalt, making it thicker and heavier, and thus, more expensive. Fiberglass on the other hand, is coated with waterproof asphalt, but topped with ceramic granules. To produce asphalt shingles, a rolled sheet is passed through a pre-saturation chamber, then to a saturation tank filled with hot asphalt. Other materials pass through a wet looping machine before going through the coating process. Once coated, the desired color is applied to the surface, then cooled and cut to size. Asphalt shingles are a great choice, but you can ask a trusted roofer in Pittsburgh for other options.
http://www.pittsburgharearoofers.com/blog/roofers-in-pittsburgh-explain-how-asphalt-shingles-are-manufactured/
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