Curling asphalt shingles are a sign your shingles are failing and need to be replaced soon. Knowing the common causes of shingle curling can help prevent roof damage.
Common causes of shingle curling include:
1. Inadequate Roof Ventilation
Normally, warm air, which contains more moisture than cold air, rises into the attic in your home. Air from the intake vents on the lower parts of your roof then pushes the warm air out through exhaust vents on the upper part of your roof. If, however, there aren’t enough vents, moisture and heat are trapped in the attic. Over time, the trapped moisture and heat under asphalt shingles cause them to curl prematurely.
2. Multi-Layered Roofs
Most contractors wouldn’t recommend installing new shingles on top of old ones. For one thing, the new shingles may not align with your old ones, creating gaps through which moisture can infiltrate your roof and increase the risk of curling. Plus, there’s also the issue of strong winds dislodging misaligned shingles.
3. Shoddy Roof Installations
Manufacturers have issued specific instructions on the installation of their shingles, including details like the number of nails per shingle and the length of the nail. Failure to follow these instructions right down to the last detail may result in misaligned shingles that are more likely to suffer premature curling.
Hiring factory-certified contractors can significantly reduce the risk of premature shingle curling. Factory-certified contractors are trained to install a specific kind of roofing product so you can rest easy knowing that your new roof will be installed properly. As an added benefit, manufacturers like GAF offer exclusive warranties to roofing systems installed by GAF-certified roofing companies.
4. Wear and Tear
As your roof’s shingles approach the end of their lifespan, which lasts roughly 20 years, they may start to curl.
Roofing by Curry, a GAF Master Elite® roofer, offers a wide range of professional roofing services, including roof repair and replacement services. To request a free estimate, call us at (941) 921-9111, or fill out our form here. We serve homeowners in Sarasota, FL, as well as the surrounding communities.