

How Summer Heat Damages Your Roof—and What You Can Do About It
Summer brings more than just rising temperatures and higher utility bills. It can also quietly wreak havoc on your roof. And if you’re not paying attention, that damage may go unnoticed until your next storm—or leak.
“Summer heat, it makes your home hot,” says Paul Browne, Operations Manager at McCoy Roofing. But what many homeowners don’t realize is just how that heat affects the shingles and ventilation systems protecting their house from above.
Here’s how heat can damage your roof and what you can do to protect your home.

Blistering and Softening: The Hidden Heat Damage
One of the most common issues caused by excessive heat is shingle blistering. Paul explains, “Summer heat can cause blistering in your shingles if ventilation isn’t balanced correctly. This is where the roof will overheat without proper airflow and causes the shingles to lift.”
These blisters create weak points in the roof where water can penetrate. They also increase the chances of shingles being torn off by high winds as the shingles raise and buckle.
On top of that, extreme heat can soften roofing materials, making them more vulnerable to damage. “Shingles are more easily scarred when walked upon during hot weather,” Paul notes, which means even routine maintenance done at the wrong time could cause unintended harm.
And it’s not just the shingles that suffer. Some contractors may cut corners with lower-quality underlayment or ice & water shield materials. In high temperatures, these materials can break down entirely. “It turns into a kind of tar and runs down,” Paul says. “Your reputable roofer will use quality materials versus roofers who win a claim on low prices and use cheap materials to maximize profit margin over quality.”
How to Prevent Heat Damage to Your Roof
Fortunately, there are a few key steps you can take to make sure your roof holds up against summer heat:
- Check your ventilation.
“Ensure your ventilation is properly balanced and airflow is correct through your attic space,” says Paul. Make sure both intake (soffit vents) and exhaust vents are clear and functioning properly. - Watch for paint obstructions.
After exterior painting, check that your soffit vents weren’t accidentally painted over. “Painters sometimes paint over and block the airflow,” Paul warns. - Avoid cut-rate contractors.
Look for roofing professionals who are transparent about their materials and certified to install them. If the quote seems unusually low, it could mean lower-quality components are being used.
What to Do If You Notice Roof Damage from Heat
If you see any signs of blistering, sagging, or compromised shingles, Paul recommends acting quickly. “Avoid further damage or mess with an inspection.” He also advises: “Reach out to whoever did your roof. If not, research for a reputable roofing company near you.”
You should also regularly monitor attic vents and exterior features for signs of heat-related wear or obstruction.
Need a second opinion or a free roof inspection?
McCoy Roofing is always here to help. Our team uses high-quality materials, prioritizes ventilation, and ensures your roof can withstand the heat—without cutting corners.
Schedule your free inspection today and protect your home before the heat takes its toll.