The answer to 'drip edge curling shingles' is that curling shingles are often caused by a problem with the drip edge installation. The drip edge is a metal flashing that is installed along the roof edges to help direct water away from the roof and prevent leaks. If the drip edge is not installed properly or becomes damaged over time, it can cause the shingles to curl up at the edges.
Some common causes of drip edge curling shingles include: poor installation (not nailed down securely), rust or corrosion of the metal, and exposure to UV rays and weather over many years. Symptoms include visible curling or lifting of the shingles along the roof edges. To fix this issue, you may need to replace the drip edge and re-secure the shingles. This is generally a job best handled by a professional roofing contractor, as improper repair can lead to further damage.