CertainTeed
Roofing
Manufactures asphalt and fiberglass shingles for low and steep
slope commercial, industrial, institutional, and residential
roofing. Also offers waterproofing applications.
http://roofing.certainteed.com/
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Elk
Corporation
Manufacturer of laminated fiberglass shingles for the roofing
industry.
http://www.elkcorp.com/
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IKO
Develops and manufactures residential and commercial asphalt
and modified bitumen shingles and other roofing products.
http://www.iko.com/
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Ondura
Corporation
Manufactures corrugated asphalt roofing tiles and sheets for
residential, commercial, and agricultural construction.
http://www.ondura.com/
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