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I've purchased a home where the previous owner installed 3/4" wide plank pine over a 5/8" plywood subfloor. The plywood is glued to a concrete slab but there is no felt paper between the 2 woods. Yes - it squeaks! They wanted the character but we'd like a little less squeak.

Any ideas on what I could do to reduce (not eliminate) the squeak?

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3/4" WIDE? or 3/4" thick with some other width? – alt Dec 9 '13 at 2:52

Since it is on a concrete slab, I don't think there is much you can do except tear it out and start over.

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There are several projects for just such a problem. The general ideal is that fill the void under the wood floor that is allowing the flex. I have no experience with any of them, but here is one such product http://www.woodfloorinjectionkit.com/ - you inject an epoxy through the wood into the void.

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