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Why Do Asphalt Shingles Curl?

Roof with shingles that have curled up, snow on roof

Along with algae, mold, and moss, you can add curled shingles to the list of unsightly roof problems. Curled shingles aren’t just eyesores; they are also detrimental to the integrity of your entire roof. The curled edges expose the vulnerable layers of your roofing system, leaving it susceptible to ice and even harsh sunrays. But why do asphalt shingles curl? Learn what causes the damage so you can get to the root of the problem and prevent future issues.


Why Do Asphalt Shingles Curl?

Weather Damage

Of course, our roofs protect us from the weather, but unfortunately, nothing protects our roofs from the weather. If you have an older roof, curling asphalt shingles could be a sign that your roof has withstood a few too many heavy snows or hail storms. Over time, shingles can wear down and start to absorb moisture, which can lead to mold. What starts out as a curled shingle can morph into a leaky ceiling and damaged drywall. So before the next round of harsh weather hits, contact your roofer and schedule a repair if you’ve noticed curling shingles.

Poor Attic Ventilation

While mold and weather damage are certainly part of the problem, the true source of curling shingles is usually poor attic ventilation.

Think of your roof’s vents as a system. If one part of the system is off-balance, the entire system can be compromised. Quality roofs have a series of both intake vents and exhaust vents. Intake vents, located at the bottom of your roof, let fresh air enter your attic. Since hot air naturally rises, exhaust vents let the hot air escape outside. If your intake or exhaust vents aren’t functioning properly, the top of your roof will be warmer than the lower sections. This becomes a big problem during the winter. After a snowfall or ice storm, ice dams can form as ice and snow melt at the top of your roof but not the bottom. As a result, the melted water can start to collect in a pool and cause water damage on your roof. One symptom of water damage is curled shingles.

Poor Roofing Installation or Materials

If your roof is relatively new and your roofing ventilation system is in tip-top shape, a contractor flaw or poor-quality shingles could be to blame if you notice curling shingles. Contact your contractor to notify him or her about the problem. Most trustworthy contractors stand by their work and will be more than happen to repair the roof if it is their fault. If the shingles themselves are the issue, check on the warranty. You might be able to get your money back or, at the very least, new shingles at no cost.


Luckily, one or two curled asphalt shingles doesn’t signify that you need an entirely new roof. Unless your whole roof wasn’t properly installed or is very old, you can usually get by with some minor repairs to the faulty shingles and perhaps an attic ventilation update to prevent the shingles from curling in the future.

Are you still wondering exactly why do asphalt shingles curl? Next time you get roof repairs, talk to your contractor about ways you can prevent them from curling again. If you live in southwest Missouri, contact Taylor-Made Roofing for help. With over 20 years of experience in residential and commercial roofing, Taylor-Made Roofing is a company that you can trust with all of your roofing needs. Our family-owned business offers quality services, a reassuring warranty, and free estimates. For more information, please contact us online. We look forward to hearing from you!

Fully licensed and insured, Taylor-Made Roofing is ready to take care of your roof.
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