CertainTeed ’s EnergyEdge slab edge forming and insulation system recently helped homeowners Kendon and Suzanne Regier establish an energy-efficient foundation for the innovative and sustainable ...

Under MBA’s guidance, all 80,000 square feet of under-slab foam insulation were installed in a single 12-hour night’s work, tallying roughly 250 man hours of labor.

It can be any thickness, but is shown here at 7”, giving R-28 on top of whatever the structural wall behind is. (They are showing insulated concrete forms but it could be anything) ...