High Density Foam Insulation R Value

You can even place it under the foundation slab.
High density foam insulation r value. Foam insulation densities vary among closed cell vs open cell forms. The r value for foamular xps insulation is provided from testing at two mean temperatures 40ºf and 75ºf and from two aging conditioning techniques 180 day realtime aged as mandated by astm c578 and a method of accelerated aging sometimes called long term thermal resistance lttr per can ulc s770 03. 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. C or thermal conductance of these materials is the reciprocal of the r value.
This foam board insulation is available with straight or tongue and groove edges to help limit air movement. Open cell spray foam absorbs and holds water. Closed cell foams are more dense and rigid typically about 2 lb cu. Installed faced fiberglass batt insulation with its r value visible r 21.
The material is costly and fragile factors that have limited its use in residential construction. This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. It is denser than eps and provides more r value with a rating of 5 per inch of thickness.
Closed cell spray foam insulation. Here are some currently available high r building insulation products as well as some specialty very high r insulation materials. They keep your home at a comfortable temperature without the need to crank your heat. It has a lower r value per inch than closed cell foam and is vapor permeable.
Open cell foams are typically about 1 2 lb cubic foot. Install it anywhere from the roof to the foundation. Rigid foam insulation also known as insulating boards provide high r values. 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.