I was called by a contractor who had installed 4" plain sawn flooring in the summer about 3 years ago in a new home, the problem there is that in the winter time there are big gaps all over that is not acceptable, in the summer time there are ok, we already scraped and refinished a couple rooms with different fillers and everything popped out, he ripped out the flooring of 2 big rooms, I tested the moisture of the plywood most of it is about 12.8, what should I do?
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