Concrete Floor Slab Perimeter Insulation

Regarding the rated r value of insulation on slab on grade floors.

Concrete floor slab perimeter insulation.

Bulletin number 552 edge insulation of concrete floor slabs from branz outlines the accepted solutions for installing edge insulation or a thermal break between the slab and the perimeter wall. If you know you have issues with moisture tend to those problems before installing the insulation. For monolithic slab and footing the insulation must extend only to the bottom of the. You may need to grind down significantly high spots to ensure an even surface.

Below grade need vertical insulation at the slab perimeter. 1 to prepare for insulating the floor first evaluate the condition of the concrete. Perimeter slab insulation heat loss through an insulated slab windows 33 roof ceiling 8 slab 15 6 doors 5 walls 39 insulation and fenestration criteria table 402 1 1. The rated r value of insulation shall be installed around the perimeter of the slab on grade floor to the distance specified.

The codes are silent about whether above grade slabs need to be insulated. However i think by far the best option is one that offers complete insulation from the ground. A careful evaluation of these materials performance attributes against the project s needs can dramatically shrink labor and material costs. These codes do not require any insulation for slabs that are more than 12 in.

Otherwise both codes require that slab on grade floors with a floor surface less than 12 in. 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. In order for the slab to be independent of the foundation wall a bond break is needed between the slab which is supported on grade and the foundation wall that supports the exterior wall structure and its loads. As clarified in appendix a of standard 90 1 2016.