We use GAF products. A roof system is so much more than shingles.1. We use Tiger Paw™A premium, UV-stabilized polypropylene underlayment that provides a critical extra layer of protection between your shingles and your roof deck. 2. We use GAF Timberline Shingles and a 3 Tab shingles.3.We put Moisture guard in our valleys, around vents, pipes, chimneys and by walls. We do this to give more protection against leaks. Your roof is the heart of your home.