Quote:
Originally Posted by gtojohn
...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...
|
There is another kind of PolyIso that is reinforced with fiberglass to give it greater compression strength.
You might look into that. As I recall, the compression strength was about 40% greater.
I have also looked at
HighLoad Styrofoam, which is quite dense, but it doesn't seem to be available in anything thinner than 2".
-AC