Rigid Foam Insulation Under Concrete Slab

40 psi x 8 wide tire x 12 long tire print 3 840 lbs.

Rigid foam insulation under concrete slab.

A common design assumption leads to specification of rigid foam strengths that are many orders of magnitude higher than necessary which can double the insulation material cost. It will reduce summertime condensation and mold accumulation and will therefore help your basement smell better. If you re building a new cold climate home with a basement you ll probably want to install a continuous horizontal layer of rigid foam under the basement slab. Understanding rigid foam insulation for foundation and under slab applications.

Contractors are increasingly called upon to install rigid foam insulation under concrete slabs and on building foundations. Owens corning enclosure solutions. They both come in various rated compressive strengths from 10 psi to about 80 psi. When building a slab on grade eps rigid foam insulation is the most common choice of insulation for performance and cost.

Eps 3 xps 2 faced or unfaced. Many builders bevel the top of the vertical insulation so that none of the rigid foam is visible after the concrete slab is placed. Concrete 4 existing drywall 2 plywood 5 wood 3 sheathing type. Xps and eps rigid insulation is used under concrete slabs.

Get free shipping on qualified under slab foam board insulation or buy online pick up in store today in the building materials department. One of the best ways to save money on rigid foam insulation installed under concrete slabs is to ensure the material is not over engineered. For installation on concrete foundations and under floor slabs the rigid foam insulation you choose can make a difference of tens of thousands of dollars on a project. In cold climates climate zones 4 and higher it s important to install vertical insulation on the interior side of the stemwall all the way down to the footing.

Water resistant rigid board for under concrete slab insulation and slab support in traffic bearing applications. Below grade under slab system with foamular rigid board insulation. Up to one quarter of a building s energy loss is due to lack of insulation in below grade areas including the foundation and under slabs. Even though the rigid foam won t save enough energy to justify its cost it s worth installing for another reason.

Say you use an average and relatively inexpensive rating of 40 psi then the insulation will support. A careful evaluation of these materials performance attributes against the project s needs can dramatically shrink labor and material costs.