Foam Board Insulation Under Concrete Slab

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.

Foam board insulation under concrete slab.

Polyisocyanurate foam insulation properties. R 15 scored squared edge rigid foam board insulation sheathing model 9gb view the owens corning. We describe research on the effectiveness of polyisocyanurate foam boards under a concrete building floor slab and we compare using polyisocyanurate sub slab insulation with polystyrene foam insulation below a concrete slab. Concrete 3 existing drywall 2 plywood 3 wood 2 sheathing type.

Below grade under slab with foamular xps insulation. Water resistant rigid board for under concrete slab insulation and slab support in traffic bearing applications. Foamular foamular 250 3 in. Get free shipping on qualified under slab foam board insulation or buy online pick up in store today in the building.

For foam plastic insulation extrusion matters xps performs better than eps pdf. Shop eps insulation shop polyiso insulation shop xps insulation. Eps 3 xps 2 faced or. For under slab applications the rigid foam insulation typically should be installed over a gravel base with a poly vapor diffusion retarder between the gravel and insulation.

Lack of foundation insulation on below grade and under slab projects can account for up to 25 of a structure s total heat loss. Get all the construction documentation you ll need. This article discusses the use of polyisocyanurate foam board insulation below concrete slabs. Concrete 4 existing drywall 2 plywood 5 wood 3 sheathing type.

Insulating properly below grade can help prevent total structure heat loss and reduce heating and cooling bills by 10 20. A careful evaluation of these materials performance attributes against the project s needs can dramatically shrink labor and material costs.