When you choose a GAF Timberline® roof for your repair or replacement, you’re in good company. More Americans have relied on GAF Timberline® Shingles than any other brand. With over a century of experience and expertise, GAF has the right products, technologies and solutions for your roofing needs. As a Standard Industries company, GAF and our related businesses are part of the largest roofing and waterproofing business in the world.