My father and I took on a small project of roofing his small cabin over the weekend. The cabin had two very small valleys in which we overlapped the shingles and cut the top shingle - 2 inches about valley line (I believe this is a closed cut)
anyway, I took some time off and when I came back my father used roofing cement under the cut shingles. He figured this would keep water from coming in. I didn’t think this was needed and it doesn’t look the greatest with the cement coming out a little. Is this the correct procedure?
Also, the line he cut down the valley was a little crooked. What is the best way to make this cut look proper - Snap a chalk line a cut it with a utility knife!
Thanks for you advice!