The asphalt shingles on the covered porch roof are looking 5X as bad as the rest of the main roof. While I suppose they could be much older I suspect they are the same age. I am thinking the problem is the porch roof needs to be vented where it attaches to the main house. What kind of venting to use?
This is a normal front porch (with roof) attached to a colonial house. Cedar siding.
This is a normal front porch (with roof) attached to a colonial house. Cedar siding.