Can shingles be resealed to prevent future leaks?

Shingles can sometimes be hand-sealed to help prevent future leaks, but it only works when the shingles are intact and the leak source is minor. Most roof leaks begin at details like flashing or lifted tabs, so a proper diagnosis matters more than just adding sealant. On warm days, shingles may re-adhere on their own, but in cold weather a small amount of compatible roofing cement under the tab is often needed. Our technicians handle this decision often for homeowners around Newtown.

Use resealing in these cases:

• A few lifted tabs after wind, with otherwise healthy shingles and good granule coverage.
• Not for curled, cracked, or missing shingles, or when granule loss is widespread.
• Leaks at chimneys, skylights, or vents usually call for flashing repair or replacement, not just sealing.
• Repeated leaks on an older roof point toward targeted replacement or a larger repair.

Have a qualified roofer locate the true source and apply only the needed repair so moisture isn’t trapped under the shingles. <br/> Updated: 2026-03-13 <br/> Need help in Newtown, PA? Call (215) 752-6145 or book online.