What Is a Roof Tear-Off? A roof tear-off, as defined by ASTM D1079, involves the removal of all layers of an existing roofing system down to the structural deck. This process is crucial for maintaining the integrity and longevity of your new roof. When Is a Complete Tear-Off Required? The International Building Code (IBC) 2018…
What Are Color Codes and Why Are They Used? Color codes are essential identifiers used by manufacturers to keep track of production runs and specific color information for shingles. These codes help maintain consistency in the appearance of shingles across different production batches. Avoid Mixing Different Color Codes It is crucial not to mix shingles…
Can GAF Shingles Be Installed Over Existing Shingles? Yes, GAF shingles can be installed over existing strip shingles, T-lock shingles, wood shingles, laminated shingles, and other asphalt premium shingles. This can be a cost-effective solution for homeowners looking to upgrade their roofs without a complete tear-off. What Is Required to Roof Over Existing Shingles? For…
What Are Metal Flashings? Metal flashings are critical components of an asphalt shingle roofing system. These include drip edge, rake edge, ridge vent, valley, step, base, and counterflashings. They are installed at roof terminations, junctions, and penetrations to divert water down the roof plane(s) into gutters, downspouts, and away from the structure, helping to prevent…
What Is the Concern? For asphalt shingle roofs, proper step flashing is crucial to prevent water infiltration and ensure the longevity of the roofing system. GAF’s standard step flashing instructions require step flashing to extend a minimum of 5 inches (127 mm) up the wall and a minimum of 5 inches (127 mm) out onto…
