The screws we see backing out under the molding on the outside of the coach actually screw into the aluminum frame of the coach, I have not pulled the molding off yet, but my guess is that they are over tightened and pulled the hole, too few screws used, too short and just not up to the job.
You can see in the pics the aluminum frame in the wall and in the roof that they use self tapping screws, to crew into.
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