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