Under Concrete Insulation Board

Foam board insulation is easy to use and is a great diy way to add some insulation.

Under concrete insulation board.

Eventually polyethylene was invented. Water resistant rigid board for under concrete slab insulation and slab support in traffic bearing applications. Applying a bead of polystyrene compatible caulk or mastic to the top of the insulation board minimizes water infiltration behind it. It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches.

For a basement remodeling project consider insulating basement walls with foam board. Use a premade kit for this type of project. Concrete contractors learned that a layer of poly helps to keep a slab dry because it stops upward vapor diffusion from the soil. A careful evaluation of these materials performance attributes against the project s needs can dramatically shrink labor and material costs.

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. R 15 scored squared edge rigid foam board insulation sheathing model 9gb view the owens corning basement and crawlspace insulation. Follow with a 2x4 frame wall and insulate it with batt insulation. Attach the tongue and groove insulation boards to the concrete wall with adhesive.

Some types of thicker foam board insulation are available but they may need to be special ordered. Continuous insulation is defined in 90 1 as insulation that is continuous across all structural members without thermal bridges other than fasteners and service openings. Lightweight rigid polyisocyanurate pir foam insulation boards such as those manufactured by celotex are among the most thermally efficient commonly available. Finally some contractors in cold climates began installing a continuous horizontal layer of rigid foam insulation under their concrete slabs.

Foamular foamular 250 3 in. It is installed on the interior exterior or is. 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.