Insulation Under Concrete Floor Slab

While you can apply insulation over the concrete slab that requires adding wood subflooring and other components that add to the cost and complexity of the project.

Insulation under concrete floor slab. Floor 1 garage 3 under slab 5 more ways to filter. 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. Below grade need vertical insulation at the slab perimeter. These f factors are acceptable for all slab on grade floors but you need to make sure.

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. Check out this article for a list of slab edge insulation solutions and episode 125 for my interview with henry edney of maxraft. Otherwise both codes require that slab on grade floors with a floor surface less than 12 in. The first thing to consider when looking into different types of concrete floors is why it s so important to insulate the floor slab.

Up to 80 of heat loss in a floor slab occurs around the edges. These codes do not require any insulation for slabs that are more than 12 in. 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. Cement 3 concrete 4 existing drywall 2 plywood 5 wood 3 sheathing type.

The foil within the product acts to spread out the heat signature of the heating coils. Eps 3 xps 2 faced or unfaced. Get free shipping on qualified under slab foam board insulation or buy online pick up in store today in the building materials department. The f factors for slab on grade floors are defined in standard 90 1.

The codes are silent about whether above grade slabs need to be insulated. Consult appendix a table a6 3 1 in the 2016 edition for a tabulation of assembly f factors for slab on grade floors based on the arrangement and rated r value of the applied insulation. Installing insulation prior to the pouring of a concrete slab floor improves the energy efficiency of the floor and makes it more comfortable. Insulation below the slab suits continuous low level heating gradually warming the thermal mass of the concrete and sustaining it at a consistent temperature.