Polyiso flooring underlayment
I'm building the sub floors for my cabin right now. This is what I'm considering for my flooring. I'm thinking for my finshed flooring putting a layer of 1/2 to 3/4" polyiso board with 1/4" plywood veneer on top and this will be all on top of 3/4" cdx plywood. The polyiso seems strong enough plus the 1/4" to spread out the load. My main concern is I hate the way cheap floating wood flooring sounds and feels bouncy. I think if I can nail it down it will sound better. Is there any reason I can't walk on polyiso? With less than an 800 sqft footprint I don't expect we'll have heavy furniture. There will be a very heavy wood stove I won't insulate or put veneer under.
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