I've been removing all the wall to wall carpeting and replacing with 3/4 X 2 1/4 solid t&g red oak. The subfloors are 3/4 t&g plywood and I've added screws between all the original nails. I've got a squeaky area between a couple of the joists. If I stand with a foot on each joist and shift my weight back and forth both joists squeak. I also get a squeak if I stand between the joists and bounce ( I weigh less than 150 lbs). Neither joist has a plywood joint on it. The room is over an unfinished basement and the joists have cross bracing. I checked to see if I could get shims between the subfloor and joists but there are no gaps. Would sistering 2 X 4's or 2 X 6's to the 2 X 10 joists be the solution? If so, should they be added with nobody standing on the subfloor?
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