Insulation Under Concrete Floor 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.

Insulation under concrete floor slab.

Check out this article for a list of slab edge insulation solutions and episode 125 for my interview with henry edney of maxraft. The codes are silent about whether above grade slabs need to be insulated. These f factors are acceptable for all slab on grade floors but you need to make sure. 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.

Up to 80 of heat loss in a floor slab occurs around the edges. The f factors for slab on grade floors are defined in standard 90 1. Eps 3 xps 2 faced or unfaced. 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.

Otherwise both codes require that slab on grade floors with a floor surface less than 12 in. The foil within the product acts to spread out the heat signature of the heating coils. 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. Installing insulation prior to the pouring of a concrete slab floor improves the energy efficiency of the floor and makes it more comfortable.

A careful evaluation of these materials performance attributes against the project s needs can dramatically shrink labor and material costs. 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. These codes do not require any insulation for slabs that are more than 12 in. Below grade need vertical insulation at the slab perimeter.

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. Floor 1 garage 3 under slab 5 more ways to filter. Cement 3 concrete 4 existing drywall 2 plywood 5 wood 3 sheathing type. Insulation below the slab suits continuous low level heating gradually warming the thermal mass of the concrete and sustaining it at a consistent temperature.