GAF Material Corporation is primarily involved in manufacturing residential and commercial roofing materials. It provides waterproofing membranes for the roofing industry under its commercial roofing business segment. The GAF commercial roofing products, systems & accessories segment includes asphaltic accessories, built-up roofing, modified bitumen roofing, single-ply, liquid-applied roofing, specialty, insulation, cover boards & fastening, adhesives, and primers & sealants for various applications in the roofing and waterproofing industry.