What Insulation Under Concrete Floor

Most modern homes have a solid floor for example.

What insulation under concrete floor.

Overlap the seams about 6 to 8 inches and seal the seams with waterproof construction tape. 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. The foil within the product acts to spread out the heat signature of the heating coils. There will be a damp proof membrane under the insulation and possibly a second membrane on top depending on the type of screed.

Up to 80 of heat loss in a floor slab occurs around the edges. The first thing to consider when looking into different types of concrete floors is why it s so important to insulate the floor slab. Foamular foamular 250 3 in. R 15 scored squared edge rigid foam board insulation sheathing model 9gb view the owens corning basement and crawlspace insulation.

This allows an area for insulation and fill material under the slab. Insulation is laid on the concrete and covered with a screed. Insulating concrete garage floors begins with covering the entire floor with 6 mil polyethylene which will serve as a vapor barrier. Lightweight rigid polyisocyanurate pir foam insulation boards such as those manufactured by celotex are among the most thermally efficient commonly available.

Check out this article for a list of slab edge insulation solutions and episode 125 for my interview with henry edney of maxraft. Insulating a solid floor. Run the polyethylene up the sides of the walls 3 to 4 inches and secure to the walls with construction tape.