Polyiso flooring underlayment

gtojohn · 02-28-15, 08:17 AM

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.

02-28-15, 08:17 AM	#1
gtojohn Journeyman EcoRenovator Join Date: Jul 2014 Location: Austin, TX Posts: 314 Thanks: 39 Thanked 50 Times in 45 Posts	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.