Sub Slab Insulation
Sub slab insulation allows the concrete slab floor to remain a comfortable temperature instead of transferring most of its heat to the earth below. This insulation is specifically designed with a density appropriate for use below concrete slabs and is therefore capable of bearing structural loads.
THANK YOU FOR YOUR CONTRIBUTION
Supreme Perlite (Thanks to Ole Errson, Portland, Oregon at Kailash Ecovillage.)
Geofoam (Thanks to Barry Price at Barry Price Architecture.)