I always thought that there should be a better roofing system, punching thousands of holes through the roof doesn't seem like a good idea. This is a video of my issue. I am hoping to get 5 or 7 more years out of it (18 to 20 years) by doing my own repairs as leaks develop.
Is this your video?
We had a leak over an enclosed porch that damaged the sheet rock ceiling. We have pictures and video of the leak location in 2022. May 2023 new roof is installed. Still leaking in the exact same location. Roofing company has been back 3 or 4 times, and they thought it was due to improper flashing on a doghouse dormer (cape cod home) or coming in through the siding where two rooflines met. Nope.
One thing we did notice around the doghouse dormer is an awful lot of face nailed shingles using small trim nails used to nail coil wrap around windows. No roofing cement over those nails, but the dormer is not "upstream" from the leak. Bush league crap.
Called the roofer again yesterday and left a message about the trim nails and face nails, and has not returned my call. I strongly suspect what is shown in this video is the source of the problem. I'm an engineer by training, and as a volunteer firefighter, I have spent a fair amount of time on roofs. I think we will get to the source of the problem.
The weird part is that the leak seems to be in the EXACT same spot where the leak was with the old roof, which was completely removed. There could be something on the roof decking penetrating the tar paper and the shingles, but yesterday's inspection did not reveal anything.