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Registered
Join Date: Jun 2007
Location: Lake Oswego, OR
Posts: 6,252
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When I put hardwoods in my house, I believe I put heavy felt paper between the plywood and the oak. Don't remember why? The floor is tight and quiet, but I don't know if the felt contributed. I bet if you are generous with a screwgun there will not be any movement. Even more so as you are covering with self-leveling compound. That floor will be SOLID.
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