Roof Replacement Using CertainTeed ClimateFlex Northgate. Gracco Roofing Services delivers expert roof replacement featuring CertainTeed ClimateFlex Northgate shingles, known for their superior Class 4 impact resistance and durability. Designed to protect your home against hail, severe weather, and extreme temperatures, these shingles offer long-lasting performance and enhanced curb appeal. Our skilled roofing team ensures meticulous installation, providing a reliable, high-quality roof built to withstand challenging climates. Trust Gracco Roofing Services for roofing solutions that combine cutting-edge materials with expert craftsmanship.