Quote:
Originally Posted by TobyB
Thanks, Jeff-
that's what I've been finding- anything over 15 psi is hard to get ahold of. Add to that
our mild climate, and no- one locally carries much in the way of higher strength insulation.
Odd, given our supposed 'green' label and relatively high energy costs,
but we're pretty mediocre in attitudes towards insulation.
I'm planning on a 5" slab, and it will probably see pretty limited loading-
smaller cars, mostly. Do you think the 15psi's ok, or should I start shopping for
something stronger?
t
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I've looked over the problem of high-strength rigid foam, also.
I goggled: "high load insulating foam", and found several choices, with tech papers to guide your decision.
There are other types of foam panels that are stronger than what is usually sold in the Big Box stores, but may be more accessible than the real High Load stuff.
And that would be rigid foam insulating panels that are specifically made for roofing applications. I have seen some with fibers combined in with the insulating board, to increase compressive strength.
It might do it.
If you read the application specs for some of the extreme High Load stuff, you will find that it is certified for use as airplane landing insulation, to go beneath the surface material. You will not need anything like this.
-AC