GAF Materials Corporation www.gaf.com
It is the largest manufacturer of residential and commercial roofing products in North America. It specializes in roofing shingles, roofing materials, roofing system, decking system, slate roofing, and green roofing.
S&K Roofing, Siding and Windows www.skroofing.com
S&K Roofing, Siding and Windows was established in 1980 to help Maryland & Virginia homeowners stay safe and increase the value of their homes with high-quality replacement roofing, siding, replacement windows, skylights, doors, gutters, attic insulation and decks.
Superior Siding & Roofing www.superiorsiding.com
It was founded in 1983 as a specialist in siding and roofing products. Its installation staff is divided up into specialty crews for roofing, siding, windows or doors. So each project is assigned to the crew that specializes in that specific type of work.