Rigid Insulation Under Concrete Slab

For me this is a no brainer.

Rigid insulation under concrete slab.

For under slab applications the rigid foam insulation typically should be installed over a gravel base with a poly vapor diffusion retarder between the gravel and insulation. With a minimum of 70 recycled content the installed thermafiber products contributed to valuable leed credits helping the building earn a leed platinum certification. A careful evaluation of these materials performance attributes against the project s needs can dramatically shrink labor and material costs. Case study salesforce tower.

I will always place the poly on top of the rigid insulation as spoke of in the superinsulated slab article. Get free shipping on qualified under slab foam board insulation or buy online pick up in store today in the building materials department. We re proud to say our products can be found in some of the tallest and safest buildings around the globe like salesforce tower. Horizontal insulation placed less than 12 inches below the ground surface or that portion of horizontal insulation extending outward more than 24 inches from the foundation edge should be protected against damage by use of a concrete slab or asphalt paving on the ground surface directly above the insulation or by cementitious board plywood.

4 10 2012 3 climate zones e301 1 6 5 8 4 slab r value table 402 1 1 insulation and fenestration requirements by component e402 1 1 climatezone slab r valued 4 10 2 ft 5 10 2 ft 6 10 4 ft 9. Additional insulation is applied along the edges of the slab because that is a primary surface for heat loss. One of the best ways to save money on rigid foam insulation installed under concrete slabs is to ensure the material is not over engineered. R 7 7 rigid foam insulation model 310891 18 35 18 35.

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. Placing poly under the rigid foam runs the risk of the concrete while being placed will find its way below the rigid foam thru cracks and joints. Concrete 4 existing drywall 2 plywood 5 wood 3 sheathing type. Walls foundations roof and roof decks air distribution ceilings interior.

Eps 3 xps 2 faced or unfaced.