We had to have our roof replaced and got the architect style shingles put on. We have already had new leaks come up around the chimney due to the flashing being cut when old shingles were removed. When the shingles were pulled up to fix flashing, there was no felt underneath in some spots. Now I have doubts that our roofer did an adequate job with the rest of the roof. Can anyone give me specifics to look for so I will know what I’m talking about?
I also have some specific questions:
Do shingles overlap or butt against each other?
How many nails per shingle is adequate?
Is there a way to safely check if felt is underneath w/o destroying shingles?
Any information would be greatly appreciated.