Under Concrete Insulation Board

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.

Under concrete insulation board.

Attach the tongue and groove insulation boards to the concrete wall with adhesive. Use a premade kit for this type of project. Water resistant rigid board for under concrete slab insulation and slab support in traffic bearing applications. Some types of thicker foam board insulation are available but they may need to be special ordered.

Foamular foamular 250 3 in. The insulation is then laid followed by a polythene separating layer and either a concrete screed or tongue and groove chipboard ready to receive the specified floor finish. R 15 scored squared edge rigid foam board insulation sheathing model 9gb view the owens corning basement and crawlspace insulation. For a basement remodeling project consider insulating basement walls with foam board.

Eventually polyethylene was invented. It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches. A careful evaluation of these materials performance attributes against the project s needs can dramatically shrink labor and material costs. It is installed on the interior exterior or is.

Lack of foundation insulation on below grade and under slab projects can account for up to 25 of a structure s total heat loss. Foam board insulation is easy to use and is a great diy way to add some insulation. Lightweight rigid polyisocyanurate pir foam insulation boards such as those manufactured by celotex are among the most thermally efficient commonly available. 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.

Concrete contractors learned that a layer of poly helps to keep a slab dry because it stops upward vapor diffusion from the soil. Follow with a 2x4 frame wall and insulate it with batt insulation. Applying a bead of polystyrene compatible caulk or mastic to the top of the insulation board minimizes water infiltration behind it.