Tab shingles are a common type of asphalt roofing shingle that are fastened to the roof deck with nails. Fastener back-out occurs when these nails begin to loosen or work their way out of the shingle and decking over time. This issue can arise due to a variety of reasons, including improper nailing during installation, the use of nails that are too short or corrosion-prone, seasonal roofing movement caused by temperature changes, or strong winds forcing the shingles upward. When nails back out, the shingles are no longer securely attached, increasing the risk of leaks and shingle blow-offs. Homeowners can do a basic check by carefully inspecting the roof edge for any loose or lifting shingles and by looking for exposed nail heads or gaps along the shingle tabs. It's safest to use binoculars or a ladder with caution, as climbing on the roof can be risky without proper experience or equipment.
If you spot signs of nail back-out, it's a good idea to consult a professional roofer who can properly nail down or replace shingles as needed and ensure the right fasteners are used to meet local code and manufacturer warranty standards. When interviewing a contractor, ask whether they use galvanized or stainless-steel nails designed for roofing and if they follow specific manufacturers' fastening guidelines to avoid voiding warranties. Also inquire about their approach for handling and preventing nail back-out — do they hand-nail each shingle properly or rely on pneumatic nailers? Verifying these details helps ensure you get a secure, long-lasting repair done safely and correctly.