Covering holes in asphalt shingles
We removed a solar water heating array from our roof and it left quite a few small holes in the shingles (fiberglass/asphalt) from 3/8" hold-down bolts. I was planning to cut or punch small (2") rounds from spare shingles, and bed them in roofing cement over each hole. Is that a sound plan? Or would a healthy shot of cement filling each hole be enough?