High Density Foam Insulation R Value

The installed insulation r value depends somewhat on the system manufacturer but generally speaking high density foam 2 0 pcf ranges between r 5 5 and r 6 5 per inch for the aged r value and low density foam 0 5pcf has an r value of approximately r 3 6 inch.

High density foam insulation r value.

This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. The material is costly and fragile factors that have limited its use in residential construction. They keep your home at a comfortable temperature without the need to crank your heat. Rigid foam insulation also known as insulating boards provide high r values.

It has a lower r value per inch than closed cell foam and is vapor permeable. Install it anywhere from the roof to the foundation. 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. This foam board insulation is available with straight or tongue and groove edges to help limit air movement.

Open cell foams are typically about 1 2 lb cubic foot. You can even place it under the foundation slab. Open cell spray foam absorbs and holds water. It is denser than eps and provides more r value with a rating of 5 per inch of thickness.

The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. 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. Closed cell foams are more dense and rigid typically about 2 lb cu. C or thermal conductance of these materials is the reciprocal of the r value.

Foam insulation densities vary among closed cell vs open cell forms. Rigid insulation is one of the best tools to reduce your energy costs. Installed faced fiberglass batt insulation with its r value visible r 21. 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.