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