screwed down squeaky sub floor, causes warped sub floor

Sep 09, 2015 1 Replies

Before replacing the carpet in my bedroom I cut the carpet and screwed down the sub floor to quiet down the squeaks.



Weeks later, the tiled floor in the bathroom adjacent to the bedroom now has a slight bulge upwards. The bulged area is about 6 inches away from the closest screwed down sub floor.



I guess screwing down the sub floor prevents them from moving horizontally due to moisture expansion.



If I cut slits between the sub floor boards with a circular saw, would that allow the floor to expand without bulging? Or should I just remove the screws and live with squeaks?


They probably didn't leave the required gaps between sheets to allow for expansion. Still seems unusual that just screwing it down more would cause this. I'd certainly try doing a relief cut, you would think that would work, if that's the source of the problem.

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