Rigid Insulation Below Slab On Grade

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Rigid insulation below slab on grade.

Water resistant rigid board for under concrete slab insulation and slab support in traffic bearing applications. 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. For example installing a below grade insulation rated for 100 psi when only 40 psi is needed will nearly double the material cost. It also discusses installation procedures for below grade and under slab insulation.

R 7 7 rigid foam insulation model 310891 18 35 18 35. 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. Set your store to see local availability add to cart. Below grade need vertical insulation at the slab perimeter.

Although both are closed cell insulations they perform very differently over the long term. View product details. Confirm with your engineer what strength is needed. The codes are silent about whether above grade slabs need to be insulated.

An easy way to recognize eps on the jobsite is that it is commonly white. These codes do not require any insulation for slabs that are more than 12 in. 2015 iecc irc section r402 2 10 n1102 2 10 slab on grade floors. Below grade under slab system with foamular rigid board insulation.

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. Below grade under slab system with foamular extruded polystyrene rigid board insulation and radiant heating. Specify this solution zip 4 3 mb.

Get all the construction documentation you ll need in a single click. Two common rigid foam insulations specified for below grade applications are expanded polystyrene eps and extruded polystyrene xps.