[Greenbuilding] underslab insulation

[Stephen Collette]

Hi Joseph,

I'm wondering how vermiculite would work. (Not the stuff from Libby,  
Montana) It's got great thermal properties, dries out well, and well  
is a mineral, so could theoretically handle being back in the ground.  
I don't know about compressive strength, under a slab however, as it's  
typically brittle. Thoughts out there?

Has anyone used vermiculite insulation recently? It's easy to use  
that's for sure.

Stephen

Stephen Collette BBEC, LEED AP
Principal
Your Healthy House - Indoor Environmental Testing & Building Consulting
www.yourhealthyhouse.ca
stephen at yourhealthyhouse.ca
705.652.5159
>
>
> I am trying to figure out an alternative underslab insulation. Maybe
> perlite, volcanic rock, airated concrete, mineralized wood chips or  
> the
> like.
>
> Looking for r-values or compressive strengths of any of these...
> Any ideas or suggestions out there?
>
> Best Energy,
> Joseph Becker
> www.ionecobuilding.org