"yourname" wrote in message
I have 2 inches of foam under my concrete garage floor, why not under a
house floor?

If you could put up with 3/4 foam plus at least 1/2 plywood, I think it
would work

You THINK it would work??? Not much confidence there.

The 2" of foam you have is under a 4" thick slab of concrete with re-bar or
wire screen keeping it all together.

That is much different than foam under laminate. The laminate is about 1/4"
to 3/8" thick and will flex considerably after the foam starts to compress
over time. If there is enough room for buildup of the floor, you'd want at
least a 3/4" plywood underlayment over the foam.

If it is eps foam, it can support about 20 psi with minimal deflection. The
laminate will flex but I don't have figures for it. Take a 200 pound person
putting down a heel on the floor and what is the psi loading of that point?
Repeat this many times a day for years.
--
Ed
http://pages.cthome.net/edhome/