any downside to a white shingle roof?
I live in New England. We're having 1/2 our roof re-done. It's hard to see from the street, and is most then 50% in shade. Nevertheless, we can reduce the job cost by > 10% (federal tax credit) by going with white (architectural) shingles.
I believe they will reduce ice-jacking a bit (less heat conduction), and maybe make our house cooler (some of roof isn't in shade).
But are there any negatives (other than roof looking dirty after a while?) Could they dry out more slowly after a storm, generating more mold, etc?