These are early signs your roof is starting to fail.
Curl up in attic.
Poor attic ventilation roofs get hotter and have excessive moisture rising up under the sheathing when there is inadequate air flow.
It should come in through the soffit and and rise out of vents at the ridge of a roof.
Three reasons for premature curl are.
Bad attic air flow inside your house warm and humid atmosphere usually rises near your attic.
Do not walk on cupping or curling shingles.
The overheating speeds up normal deterioration of the shingles.
You may see cracking at various points.
This is when you start to see the edges of the shingle curl up.
Perhaps weatherization work or changes in your hvac system have increased humidity levels in the attic.
15 cozy attic bedrooms that we d love to curl up in cottage life.
This most often occurs when moisture builds up in the attic in hot humid conditions.
Blistering happens with humidity levels get too high around the shingle.
A wet basement or crawlspace can also result in a humid attic through the stack effect.
This is the perfect nook to curl up in on a freezing winter night.
Common causes include aging as well as wear due to climate.
Check for duct leaks or other moisture sources such as bath fans venting into the attic.