What Insulation Under Concrete Floor

Check out this article for a list of slab edge insulation solutions and episode 125 for my interview with henry edney of maxraft.

What insulation under concrete floor.

Insulating a solid floor. This allows an area for insulation and fill material under the slab. Lightweight rigid polyisocyanurate pir foam insulation boards such as those manufactured by celotex are among the most thermally efficient commonly available. The first thing to consider when looking into different types of concrete floors is why it s so important to insulate the floor slab.

Run the polyethylene up the sides of the walls 3 to 4 inches and secure to the walls with construction tape. Foamular foamular 250 3 in. Insulating concrete garage floors begins with covering the entire floor with 6 mil polyethylene which will serve as a vapor barrier. Most modern homes have a solid floor for example.

R 15 scored squared edge rigid foam board insulation sheathing model 9gb view the owens corning basement and crawlspace insulation. The reflectix concrete slab insulation is an innovative easy to handle product that increases the energy efficiency of radiant floor and snow melt systems under concrete. Up to 80 of heat loss in a floor slab occurs around the edges. There will be a damp proof membrane under the insulation and possibly a second membrane on top depending on the type of screed.

Insulation is laid on the concrete and covered with a screed. 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. Overlap the seams about 6 to 8 inches and seal the seams with waterproof construction tape.