Rigid Insulation Below Slab On Grade

Below grade need vertical insulation at the slab perimeter.

Rigid insulation below slab on grade.

Products in this solution. Owens corning enclosure solutions. Get free shipping on qualified under slab foam board insulation or buy online pick up in store today in the building materials department. Get all the construction documentation you ll need in a single click.

Although both are closed cell insulations they perform very differently over the long term. Below grade under slab system with foamular extruded polystyrene rigid board insulation and radiant heating. Slab on grade floors with a floor surface less than 12 inches below grade should be insulated in accordance with information provided in the insulation and fenestration requirements by component table which is reproduced following this paragraph. It also discusses installation procedures for below grade and under slab insulation.

View product details. Slab is one foot or less below grade r 10 insulation required extending 2 feet below grade for climate zones 4 and 5 4 feet below grade for climate zone 6 insulation should extend downward from the top of the slab with two options to reduce slab edge insulation r value exterior slab insulation must be protected 46. The codes are silent about whether above grade slabs need to be insulated. For example installing a below grade insulation rated for 100 psi when only 40 psi is needed will nearly double the material cost.

Otherwise both codes require that slab on grade floors with a floor surface less than 12 in. Two of the rigid foam insulations most commonly used below grade and under slabs are expanded polystyrene eps and extruded polystyrene xps. Water resistant rigid board for under concrete slab insulation and slab support in traffic bearing applications. R 7 7 rigid foam insulation model 310891 18 35 18 35.

Two common rigid foam insulations specified for below grade applications are expanded polystyrene eps and extruded polystyrene xps. These codes do not require any insulation for slabs that are more than 12 in. Many designers mistakenly assume that loads placed on slabs transfer through to the underlying insulation and soil at a 45 degree angle instead of a more. Set your store to see local availability add to cart.

Specify this solution zip 4 3 mb. Confirm with your engineer what strength is needed.