Blisters on Asphalt Shingles: What Are Those Little Bumps?
You look closely at your roof and notice small raised bumps across several shingles. They almost look like bubbles. Are they hail impacts? Heat damage? A leak? Possibly none of those. You may be seeing shingle blistering. GAF describes shingle blisters as small raised, pimple-like bumps and identifies trapped moisture or excessive roofing cement beneath […]