What Are Those Black Stains on the Roof? Those unsightly black stains on your roof are caused by algae. Algae appear as dark stains on shingles, typically covering more area on the lower sections of the roof and tapering as they reach the ridge. How Does a Roof Get Algae? Algae spread via airborne spores…
What Is High Nailing? High nailing refers to the practice of nailing shingles too high above the butt (bottom) edge or above the nailing guideline. This can significantly impact the performance and durability of the roof. How to Identify High Nailing To ensure proper nailing, GAF shingles must be fastened: While some variation is expected,…
Proper Underlayment Installation for Roof Repairs When replacing a single roof plane, it’s crucial to follow specific underlayment requirements for hips and ridges to ensure the roof’s integrity and performance. Here’s a guide to the proper procedures. Underlayment Requirements for Hips For hips, the underlayment should be lapped over the hips at least 4” (102…
What Is the Concern with Snow on Asphalt Shingle Roofs? Under normal winter conditions, snow and ice generally do not need to be removed from GAF Asphalt Fiberglass Shingles. However, removal may be necessary if: Evaluating the Situation Before taking action, carefully evaluate the situation by considering the following questions: What Should You Do If…
What Are Self-Adhered Leak Barriers? Self-adhering leak barriers are used on various parts of the roof, including the eave, rake, valley, and around roof penetrations. These barriers are critical in both new and re-roof applications to prevent leaks. The remainder of the roof is typically covered with non-perforated, breathable (moisture vapor permeable) roof deck protection….
