If you’re wondering if curled asphalt shingles are normal, then the answer is a big no. It’s most likely that the most exposed part of your roofing system are the shingles. Naturally, they are the first line of defense against severe weather conditions and other harsh elements. There are many signs that tell you that the roof is ineffective, and one of them is curling shingles. It’s best to understand a few reasons why shingles curl in the first place.