Rigid Insulation Below Slab On Grade

Confirm with your engineer what strength is needed.

Rigid insulation below slab on grade.

Specify this solution zip 4 3 mb. An easy way to recognize eps on the jobsite is that it is commonly white. Two common rigid foam insulations specified for below grade applications are expanded polystyrene eps and extruded polystyrene xps. Owens corning enclosure solutions.

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. Get all the construction documentation you ll need in a single click. View product details. The codes are silent about whether above grade slabs need to be insulated.

Below grade need vertical insulation at the slab perimeter. R 7 7 rigid foam insulation model 310891 18 35 18 35. For example installing a below grade insulation rated for 100 psi when only 40 psi is needed will nearly double the material cost. 2015 iecc irc section r402 2 10 n1102 2 10 slab on grade floors.

Two of the rigid foam insulations most commonly used below grade and under slabs are expanded polystyrene eps and extruded polystyrene xps. Set your store to see local availability add to cart. Products in this solution. 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.

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. Below grade under slab system with foamular rigid board insulation. Below grade under slab system with foamular extruded polystyrene rigid board insulation and radiant heating.

Water resistant rigid board for under concrete slab insulation and slab support in traffic bearing applications. Although both are closed cell insulations they perform very differently over the long term.