Greetings all. I'm at the end of a bathroom renovation and was about to have the taper come by and finish taping the ceiling. Upon looking up the other day I noticed light brown water stains where the wall at the top of the window meets the drywall ceiling. I took a piece of the ceiling down and there was very little water where the metal wall stud track and metal ceiling track meet. I thought the water might be coming from the tub upstairs but that doesn't seem to be the case. I also thought maybe from the bricks outside but it hasn't rained in 3 days. There is a horizontal PVC drain right in that area that wasn't leaking when we tested it back when all the walls were open and it doesn't seem to be leaking now. Is it possible that because the PVC pipe is near the outside wall that it is condensing when there is warm water in the pipe from running the shower?
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