High Density Foam Insulation R Value

Rigid insulation is one of the best tools to reduce your energy costs.

High density foam insulation r value.

The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. Here are some currently available high r building insulation products as well as some specialty very high r insulation materials. That means if you used foam it green closed cell which is r 7 per inch it s r value for a 3 5 deep wall cavity would be r 24 5. It is denser than eps and provides more r value with a rating of 5 per inch of thickness.

Closed cell spray foam insulation. This foam board insulation is available with straight or tongue and groove edges to help limit air movement. The material is costly and fragile factors that have limited its use in residential construction. Open cell spray foam absorbs and holds water.

It has a lower r value per inch than closed cell foam and is vapor permeable. Aerogel has an r value of about r 10 per inch is 99 air and insulates up to 37 times higher r value than fiberglass. Installed faced fiberglass batt insulation with its r value visible r 21. They keep your home at a comfortable temperature without the need to crank your heat.

You can even place it under the foundation slab. Closed cell foams are more dense and rigid typically about 2 lb cu. Foam insulation densities vary among closed cell vs open cell forms. C or thermal conductance of these materials is the reciprocal of the r value.

Aerogel is an extremely good thermal insulator which at a pressure of one tenth of an atmosphere has an r value of r 20 per inch of thickness compared to r 3 5 inch for a fiberglass blanket. This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. Rigid foam insulation also known as insulating boards provide high r values. Open cell foams are typically about 1 2 lb cubic foot.