My neighbor was doing a small roofing project and it looked like he was doing something incorrect.
While laying shingles and coming to the last shingle of a row you would normally strike/cut the shingle so it would not overhang. Due the it being a bit colder, on occasion if the shingle was not that much off he would just overlap the last shingle to the previous shingle. So a few inches of shingle ‘A’ would lay under the previous shingle ‘B’ instead of laying flat. The end shingles looked nice and straight by using the factory cut on the outside and you really couldn’t tell a big difference when looking at the work due using a 40 yr shingle in a weatherwood color. But we have disagree about the shingles having any issues down the road.
Is this common practice? would this cause any issues down the road? I told him I would ask the experts and report back as in the spring he has a bigger project! Thanks