Fiberglass shingles are a popular roofing material known for their durability and cost-effectiveness, but seam failure can sometimes occur, causing the shingles to lift, curl, or separate. This issue typically happens due to poor installation, such as insufficient adhesive bonding at the seams or improper nailing, which prevents shingles from sealing properly. Extreme weather conditions, like strong winds, heavy rain, or rapid temperature changes, can also contribute to seam failure over time by stressing the shingles and weakening the bond. Diagnosing seam issues involves a careful visual inspection from the ground or safely on the roof, looking for shingles that appear raised, cracked, or detached at the edges. Small gaps or breaks along the seams are early warning signs. Homeowners can safely check for these problems with binoculars or by gently inspecting accessible areas, avoiding walking on the roof if it isn’t safe or if shingles seem fragile.
If you spot seam failure, quick attention can prevent leaks and further damage. Minor repairs might involve applying roofing cement or special adhesive tape to reseal loose seams, but these are temporary fixes. Because proper repair often requires removing and resetting affected shingles, a professional roofer's expertise is crucial. When calling a contractor, ask whether they will perform a thorough inspection beyond just the visible areas to uncover hidden damage and if their repair method is fully compliant with the shingle manufacturer’s warranty to avoid voiding your coverage. Also, inquire about their experience with fiberglass shingles specifically, as different materials have unique handling needs. A reliable roofer will provide a clear evaluation, a detailed repair plan, and reassurance that the fix will restore the roof’s integrity without risking future seam failures.