Rigid Insulation R Value Thickness

Rigid foam insulation packs a lot of r value into a relatively thin package.

Rigid insulation r value thickness.

Rigid insulation is usually made up of fibrous materials or plastic foams. Because rigid foam plastic insulation products are not all aged in accordance with the same standards it is useful to publish comparison r value data. Because rigid foam plastic insulation products are not all aged in accordance with the same standards it is useful to publish comparison r value data. Our r value guide to rigid insulation includes the doe s recommended insulation by zone chart r value calculator and base building material r values chart.

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. It is often used as a layer of continuous insulation on exterior walls and in the roof. A higher r value means that the insulation will do a better job of holding in conditioned air whether that s heat in the winter or cool air in the summer. 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 real.

Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness. Used in this way the foam lowers the loss of energy through framing members a phenomenon called thermal bridging and increases the overall r value of the roof or wall assembly. Rigid insulation r value by comparison usually ranges from r 4 0 to 6 5 and may get as high as r 8 7 depending on the insulation material. Understanding r value thursday december 13 2018 what does r value mean.