The answer to 'why is my gutters curling shingles' is that curling shingles are often caused by issues with the gutters. When gutters are clogged or not draining properly, the excess moisture can cause the shingles to curl and lift at the edges. This can lead to leaks, water damage, and further deterioration of the roof.
Some common symptoms of this problem include visible curling or cupping of the shingles, especially around the gutters, as well as water stains or mold on the siding or fascia. In some cases, the shingles may even start to detach from the roof.