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Seems to be a lot of differing opinions on this. I get that having something between the two can offer less squeaking, some noise abatement and depending on material - a vapor barrier which I may or may not need.

Waxed paper? Paper with tar-infused? Some Tyvek-like material? Nothing?

Help would be greatly appreciated. Some professionals I've talked to seem like they're just trying to upsell me on the latest/greatest Microban-infused super layer stuff. Which leaves me with a wide variety of answers.

etkeeney
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Nothing. You want the wood to breathe & there are plenty of 100+ year old houses to prove & approve this "method". If you're gluing & face nailing the boards, then forget the nails. Screw down the subfloor & then Finish Screw down the finish floor. You'll never have a squeak & the floor will always be solid.

Iggy
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