GAF is a building materials manufacturing company that produces roofing materials, insulation, and other products for residential and commercial buildings. The company was founded in 1886 and is headquartered in Parsippany-Troy Hills, New Jersey. GAF has a long history of innovation and has developed many industry-leading products over the years. The company's products are known for their quality and durability, and are used by builders and homeowners across the country. GAF is committed to sustainability and has implemented many environmentally-friendly practices in its operations.