Roofing Certifications Explained: GAF, Owens Corning, HAAG & More
Not all roofing certifications are created equal. Some are earned through rigorous training and testing. Others are purchased marketing badges with no real requirements. Here’s what the major certifications actually mean — and which ones matter when choosing a roofer in Roanoke. GAF Certified Contractor GAF is North America’s largest roofing manufacturer. Their certification requires…
