Shingles are the most common type of residential roof in Missouri, more than 90% of St Louis homes have a shingle roof. St Louis Roofing & Exteriors has achieved the status of GAF Weatherstopper Roofing Contractor for GAF, North America's largest roofing manufacturer. These credentials allow us to offer the GAF Weather Stopper System Plus Ltd. Warranty on every shingle roof we install. Your warranty will provide coverage against manufacturing defects for all significant GAF components on your roof (not just your shingles) up to 50 years of non-prorated coverage, backed by GAF, so your roof's warranty is the most comprehensive coverage available in the industry.