Most Northeast Ohio homeowners think winter does the most harm to a roof, through ice dams, snow load and freeze-thaw. Those threats are real. Your roof still takes more daily punishment in July and August than it does in January.
Summer doesn't announce itself the way a February ice dam does. There's no dramatic leak, no chunk of ice hanging off the gutter. Summer damage builds up slowly, and you can't see it from the driveway. By the time you see it from the ground, the shingle has usually been failing for two or three seasons.
Below is what summer does to your shingles, and why late August into early September is the right time to look.
Three Things Summer Does to Your Shingles
- UV breaks down the asphalt. Asphalt shingles are, at their core, asphalt. Ultraviolet light breaks the chemical bonds in that asphalt binder the same way it fades a car dashboard or cracks a garden hose. Northeast Ohio summers run long daylight hours, and a south- or west-facing slope takes direct UV for most of the day. Over years, UV dries the binder out, and the shingle loses the flexibility it needs to seal flat and shed water.
- Heat bakes out the oils. On an 85°F day, the surface of a dark shingle can reach 150-170°F. You can measure it with an infrared thermometer. At those temperatures, the volatile oils that keep a shingle pliable cook off. A shingle that's lost its oils gets brittle, and brittle shingles crack at the edges and lose their granules.
- Thermal cycling loosens everything. Every day, your roof goes from a cool 60°F morning to a 150°F+ afternoon and back down overnight. Everything on the roof expands in the heat and contracts as it cools, shingles, nails, flashing, sealant. Do that 90 days in a row and nails back out slightly, sealant strips crack, and the tabs that were glued down in spring start to lift.
What the Damage Actually Looks Like
You usually can't see any of this from the ground, so it gets ignored. Up close, it shows as:
- Granule loss. Bald or shiny patches where the protective granules have worn off, exposing the asphalt underneath. You'll often find the granules first, black, sandy grit in the gutters and at the bottom of downspouts.
- Brittle, cracking edges. Shingle corners that have curled up or cracked. Cupping in the middle of the field.
- Lifted tabs. Shingles that are no longer sealed flat, the wind catches the edge and folds it back. One summer storm finishes the job.
- Failed pipe-boot rubber. The rubber gaskets around plumbing vents are the single most UV-vulnerable part of your roof. Summer cracks them, and a cracked boot is a guaranteed leak by midwinter.
When Should You Check Your Roof After Summer?
Late August or early September is the best time, for two reasons.
First, the damage is fresh and fixable. A lifted tab re-sealed in September is a 10-minute repair. The same tab left through a Northeast Ohio winter becomes a wind-torn gap, a soaked deck, and a stained ceiling by March. Catching summer damage in early fall is the difference between a small repair and a winter emergency.
Second, you beat the rush. Every roofer in the region gets booked up once the first cold snap and the first ice dam hit. Calls in November and December are booked out, and the weather makes good work harder. A late-August or early-September inspection means you're scheduling repairs while crews have open calendars and the weather still allows good work. (When you're ready for the full pre-freeze rundown, our fall pre-winter roof checklist walks through all 14 points.)
The Honest Part: Sometimes There's Nothing Wrong
Often, an end-of-summer check turns up nothing urgent. A roof that's 8 years old with decent ventilation often sails through summer fine. If that's your roof, we'll tell you that, and you go into winter knowing the roof is fine instead of wondering every time it rains.
The roofs that need attention are usually the ones over 12-15 years old, the ones on the south and west slopes with all-day sun, and the ones with poor attic ventilation that bakes the shingles from underneath as well as on top. (Read more on why roof ventilation matters.)
What to Do This Week
- Walk your gutters and downspout splash zones. Black, sandy granules mean your shingles are shedding their UV protection. That's your first warning sign.
- Look at your roof from the ground with binoculars. Scan for lifted tabs, curled corners, or bald patches. Check the south and west slopes hardest.
- Check your pipe boots if you can see them. Cracked or split rubber around the vent pipes is the most common summer-into-winter leak source.
- If your roof is over 12 years old, have a roofer inspect it. An inspection now tells you exactly where you stand before the weather turns.
Don't wait for winter to show you what summer already did. By the time a summer-aged shingle leaks, it's January, it's 20°F, and you're calling around for an emergency repair. Look now, while looking is easy.
Schedule an End-of-Summer Roof Check
Mike Ende, owner of Rockstar Roofing LLC, based in Ashtabula, Ohio, answers the phone himself. Call (440) 645-2003 or request a free estimate. Same-week scheduling available across Ashtabula, Lake, Geauga, Cuyahoga, Summit, and Mahoning counties through the fall.
Sources & Further Reading
Frequently Asked Questions
Does summer heat damage a roof?
Yes. On an 85°F day, a dark shingle's surface can reach 150-170°F, which cooks off the oils that keep it pliable. UV breaks down the asphalt binder, and daily heating and cooling loosens nails and cracks sealant strips.
What does summer roof damage look like?
Look for granule loss, which shows as bald or shiny patches and black, sandy grit in the gutters. Other signs are brittle or curled shingle edges, tabs that no longer lie flat, and cracked rubber around pipe boots. Most of it is hard to see from the ground.
When should I check my roof after summer?
Check it in late August or early September. Damage found then is still a small repair, and a lifted tab re-sealed in September takes about 10 minutes. Roofers get booked up once the first cold snap and ice dam hit, so early fall also gets you on the schedule sooner.
Which roofs are most at risk from summer heat?
Roofs over 12-15 years old are most at risk. South- and west-facing slopes that get all-day sun age faster. Poor attic ventilation also bakes shingles from underneath.
What can I check myself before calling a roofer?
Walk your gutters and downspout splash zones for black, sandy granules. Use binoculars from the ground to scan for lifted tabs, curled corners or bald patches, and check any pipe boots you can see for cracked rubber. If the roof is over 12 years old, have a roofer inspect it.
About the Author
Mike Ende, Founder, Rockstar Roofing LLC
Mike Ende has 9+ years of Northeast Ohio roofing experience and founded Rockstar Roofing LLC in 2024. He is an Owens Corning Duration installer, BBB A-rated, fully insured, and personally answers the phone at (440) 645-2003. Based in Ashtabula, OH, Mike serves homeowners across Ashtabula, Lake, Geauga, Cuyahoga, Summit, Mahoning, and Stark counties.
Read Mike’s full story →This article was last reviewed and updated on November 2, 2026.