How To Insulate Under A Concrete Floor

Up to 80 of heat loss in a floor slab occurs around the edges.

How to insulate under a concrete floor.

Step 1 excavate the area under the slab to 12 inches below the planned level of the top of the slab. Three key benefits of insulating the concrete floors in the basement are heat loss prevention moisture prevention and a higher level of comfort. Typically the insulation would be situated below the slab and below the damp proof membrane for heavy duty use whilst normal domestic buildings would have a. Insofast s insulation panels provide an easy way to insulate a cold concrete floor.

There are arguments for and against both but if you are to use an underfloor heating method of some kind the insulation is often placed on top of the floor slab under the screed. In addition to offering insulation and energy savings the plywood subfloor described here can provide the perfect foundation for finish flooring such as carpeting adding warmth in look as. This allows an area for insulation and fill material under the slab. Insulating a concrete floor can save you money on your heating bill making an attached garage or basement warmer and by extension the rest of your house.

If the concrete floor is dry and reasonably level insulate directly on top with a rigid foam insulation that is impervious to moisture air leakage and radon gas. If the basement floor is wet hire a professional find the source of the problem and fix it before doing anything. Overlap the seams about 6 to 8 inches and seal the seams with waterproof construction tape. Why it s important to insulate a concrete floor in the basement.

Where the heating is likely to be turned on and off such as in new build domestic properties and a faster thermal response is required the floating floor arrangement of. If your concrete floor is for industrial or heavy duty applications then any insulation you use needs to have a high compressive strength to take the weight of whatever is above. 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 panels can be applied to every surface from floors to walls to ceilings. An uninsulated or under insulated basement floor is a major source of heat loss in the home. Insulating concrete garage floors begins with covering the entire floor with 6 mil polyethylene which will serve as a vapor barrier. Check out this article for a list of slab edge insulation solutions and episode 125 for my interview with henry edney of maxraft.

Insulation below the slab suits continuous low level heating gradually warming the thermal mass of the concrete and sustaining it at a consistent temperature. Insofast easily exceeds the compressive strength requirements.