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Posted on Hardwood floor underlayment

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2 posts in 3067 days

#1 posted 09-01-2010 02:24 PM

Just a note with the 1/4 ply… Make sure you lap all of the seams in the subfloor below by running the sheets perpendicular to the existing subfloor and offsetting the starter run. Though I have not done this to raise the height for a hardwood floor, I have used this technique many times for vinyl, linolium and engineered flooring requiring leveling and stabilization. To prevent and elimiate squeeks, I typically use rosin paper between the subfloor and sheathing and ringshank nails spaced 4” around the perimeter of each piece and 8” spacing in the fields. I your case, I would use rosin paper again between the sheating and the hardwood.

And as another note, I only use subfloor adhesive on the floor joists when laying new, or replacing the subfloor. I would not recommend it between an existing subfloor and the sheathing for a multitude of reasons, including creating voids which, once the adhseive has cured, could actually cause more squeeks than it prevents. Further, even though it may never be necessary to redo your work, once you put on the adhesive, removing that sheathing becomes a complete tear out and messes up the entire deck. It is like glued on carpet. Anytime you put something together, think aboiut the guy who may have to come and take it apart or repair it down the road.


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