Founded in 1886, GAF Materials Corporation has grown to become North America's largest manufacturer of residential roofing (sold under the GAF-Elk brand) and commercial roofing (sold under the GAF brand). Professional installers have long preferred the rugged, dependable, performance that only a GAF roof can offer, and have made it the #1-selling brand in North America. But our recent and rapid success in growing the company to nearly $3 billion in sales has been based on our unique philosophy of helping to assure your best and safest choice in roofing.