Rigid Insulation Under Slab

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.

Rigid insulation under slab.

If your slab is heated it s a good idea to increase the r value of the vertical and the horizontal insulation to at least r 20. Rigid insulation is one of the best tools to reduce your energy costs. Specify this solution zip 4 3 mb. 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.

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. Below grade under slab system with foamular rigid board insulation. Install it anywhere from the roof to the foundation. Rigid foam insulation also known as insulating boards provide high r values.

Set your store to see local availability add to cart. Get free shipping on qualified under slab foam board insulation or buy online pick up in store today in the building materials department. Slabs that include embedded hydronic tubing for radiant heat always need a continuous layer of horizontal insulation under the entire slab. Below grade under slab system with foamular extruded polystyrene rigid board insulation and radiant heating.

Insulation located below grade as required in climate zones 4 through 8 should extend the length specified in the table by any combination of vertical insulation insulation extending under the slab or insulation extending out perpendicular to the building insulation extending perpendicular away from the building should be protected by. Water resistant rigid board for under concrete slab insulation and slab support in traffic bearing applications. They keep your home at a comfortable temperature without the need to crank your heat. You can even place it under the foundation slab.

As insulation becomes increasingly common on foundations and under slabs understanding the performance and cost factors of the different materials is important for successful bids and profitability. Products in this solution. Additional insulation is applied along the edges of the slab because that is a primary surface for heat loss. Eps offers a number of advantages over the more commonly installed xps including having the highest r value per dollar among rigid insulations.

A common design assumption leads to specification of rigid foam strengths that are many orders of magnitude higher than necessary which can double the insulation material cost. Owens corning enclosure solutions.