Spray Foam Under Slab On Grade

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. Geolift works for driveways sidewalks patios garage floors even pool decks.

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An easy way to recognize eps on the jobsite is that it is commonly white.

Spray foam under slab on grade.

Owens corning enclosure solutions. Holes should be no less than six inches away from the edge of the concrete. Two common rigid foam insulations specified for below grade applications are expanded polystyrene eps and extruded polystyrene xps. The best way to insulate under a slab on grade concrete foundation is with eps rigid foam insulation.

Although both are closed cell insulations they perform very differently over the long term. As with any new technique however there are some considerations to take into account before using this approach for the first time. And yes it is a foam just like your beloved spray foam. Two of the rigid foam insulations most commonly used below grade and under slabs are expanded polystyrene eps and extruded polystyrene xps.

The first step is to drill holes in the problem concrete. Below grade under slab system with foamular rigid board insulation. Confirm long term thermal performance. See our step by step slab on grade construction videos in the ecohome green home building guide pages.

Geolift works in three steps. It also discusses installation procedures for below grade and under slab insulation.

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