What Insulation Under Concrete Floor

Insulating a solid floor.

What insulation under concrete floor. Insulation is laid on the concrete and covered with a screed. Most modern homes have a solid floor for example. 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.

Adding insulation under the concrete floor requires the same skill set and equipment as forming and pouring the concrete slab. 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. Foamular foamular 250 3 in. Lightweight rigid polyisocyanurate pir foam insulation boards such as those manufactured by celotex are among the most thermally efficient commonly available.

There will be a damp proof membrane under the insulation and possibly a second membrane on top depending on the type of screed. The foil within the product acts to spread out the heat signature of the heating coils. Up to 80 of heat loss in a floor slab occurs around the edges. Step 1 excavate the area under the slab to 12 inches below the planned level of the top of the slab.

This allows an area for insulation and fill material under the slab. Check out this article for a list of slab edge insulation solutions and episode 125 for my interview with henry edney of maxraft. R 15 scored squared edge rigid foam board insulation sheathing model 9gb view the owens corning basement and crawlspace insulation.