my contractor just build a new wall for the closet in my master bedroom, after they put down the flooring. we have noticed this gap for around 9/16inch from one end to the other. this is super obvious but they aren't willing to redo the wall, so I want to check if this is within tolerance and where can I find code or standard for that? thanks all in advance!

Hello everyone, I am doing a bathroom remodel because of a spongy floor and found mold. I took out the fiberglass shower and the walls were in bad shape so I (started) to take out the drywall as well. Behind the fiberglass shower, where the mixer is (was) - about 4 feet up from the floor there was unfaced insulation behind a clear plastic vapor barrier in the stud bay. I couldn't understand why it was installed 4 feet up and not all the way to the floor.. until I was about to take it out (there is mold growth on the vapor barrier and insulation.) When I went to remove it I was surprised to see that it opens up into attic space. The bottom four feet has drywall on the backside of the frame, but above that there is no backing - the frame is just open into the attic space, it is like this behind where the vanity is (was) as well. From what I understand, you are not supposed to have a vapor barrier behind a vapor barrier because of condensation buildup. Would the fiberglass shower be 1 vapor barrier and the plastic sheeting over the insulation count as a second vapor barrier? New code in my area requires cement-board behind shower surrounds even if its fiberglass or acrylic, so I am going to need to put in cement board. My main question is, since this opens up into the attic I am assuming I will indeed need to put in insulation in the stud bay. Would paper faced insulation be appropriate for this application? I live in the inland pacific northwest, and since its attic behind the frame,I plan on getting paper faced R-30 rated insulation. My apologies for the rambling, I hope this is the correct forum for the question.