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Unread 11-08-2020, 10:11 PM   #12
BIGPHIL
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Join Date: Oct 2011
Location: Gig Harbor, WA
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I believe CX stated in post #2 that what you just outlined would be an acceptable method as long as you use appropriate fasteners with adequate length and ensure you're driving them into the joists. After removing any debris and dust from the old floor, you'd probably need a good coat of wood glue across the entire surface to get a good bond and minimize the chance of a squeaky floor. I don't think construction adhesive would be good in this scenario because it would be hard to coat the entire surface and you'd end up with voids and air pockets most likely. If you decide to remove the 1/2" subfloor, you'll want to install blocking at any and all unsupported edges.
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