Hardwood Installed on Slab
I have a master bedroom addition we are building for a client.
Foundation will be a slab with masonry perimeter similar in design in the attached document.
Existing finished flooring is over a framed floor system. A few factors provided the decision to use a raised slab instead of a crawlspace for the addition.
My initial plan was to install 2×4 sleepers flat to the slab, Advantech subfloor and then 2.25″ hardwood flooring. The finished flooring will be at the same height as the existing finished flooring of the house.
I felt that the 2×4’s attached to the slab and then the subfloor with the hardwood may provide a similar feel to a framed floor system.
In doing some research I came across this Joseph Lstiburek article “Walking the Plank” also attached.
The recommendation in the article was to forgo sleepers as a past method and install the plywood directly to the slab after the installation of a proper vapor barrier.
I feel like the 2×4 sleepers plus the subfloor and then the hardwood floor makes sense…
Would I be better simply gluing down the plywood and then fastening the hardwood flooring to the subfloor and forgo the sleepers?
Would I be creating other issues with having a closed cavity created by the sleepers that could create other potential issues?
Then there is the last couple of sentences discuss a floating floor? Would I not glue the subfloor to the concrete slab? I planned to weave into the existing floor or even if I head off the floor at the new opening?
Am I overthinking this assembly?
Thanks in advance.
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