Holes should be no less than six inches away from the edge of the concrete.
Spray foam under slab on grade.
Geolift works in three steps.
Two common rigid foam insulations specified for below grade applications are expanded polystyrene eps and extruded polystyrene xps.
Geolift works for driveways sidewalks patios garage floors even pool decks.
Confirm long term thermal performance.
The best way to insulate under a slab on grade concrete foundation is with eps rigid foam insulation.
Two of the rigid foam insulations most commonly used below grade and under slabs are expanded polystyrene eps and extruded polystyrene xps.
It also discusses installation procedures for below grade and under slab insulation.
Owens corning enclosure solutions.
And yes it is a foam just like your beloved spray foam.
As with any new technique however there are some considerations to take into account before using this approach for the first time.
Insulating under foundation and basement slabs using spf spray polyurethane foam offers certain advantages over the more common method of using rigid foam board.
Water resistant rigid board for under concrete slab insulation and slab support in traffic bearing applications.
An easy way to recognize eps on the jobsite is that it is commonly white.
See our step by step slab on grade construction videos in the ecohome green home building guide pages.