Sorry for the fuzzy picture, I took it from a window. We noted several yellow faint ceiling stains along a rafter, not wet at this time and not sure how long they have been there. This vent pipe sits about 10ft. up, yet in line with these stains. Roofer is coming on Tuesday to check things out. From what I can see, the rubber around the pipe is intact but everything I have researched indicates that the lower or skirt part of the flashing should be above the shingles, not under them. Could this be causing a leak. Thanks!
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