Rigid Foam Insulation R Value Chart

As a foil faced polyisocyanurate foam insulation enerfoil tm s r value actually more than doubles when it is twice as thick as you can see from the chart above.

Rigid foam insulation r value chart.

Standard r value of r 5 8 per inch the manufacturing process starts with liquid foam not recyclable has to be sprayed against a substrate to form a rigid panel so all iso panels are faced different facings affect the performance of the panel in both durability and perm rating. 8 3 4 4 8 2 20. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. 1 844 446 7858 my account.

This material offers the highest r values about r 6 to 6 5. R 0 77 30 phenolic foam insulation r values. 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. 4 5 21.

It provides about r 5 per inch. Foam board insulation types. R values vary depending on many factors including the mean temperature at which the test is conducted and the age of the sample at the time of testing. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and.

The common denominator among varieties of insulation is the r value. Some products have reinforced facing to make them sturdier. I ve written several posts about how to insulation basement walls in which i promote the use of foam board insulation as the first line of defense against moisture and mold. Corrosion problems when in contact with steel roofing moisture.

Other materials may only have a fifty percent increase in r value when their thickness is doubled. 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 time aged as mandated by astm c578 and a method of accelerated aging sometimes called long term thermal resistance lttr per can ulc s770 03. It provides r values that range from 3 6 to 4 2 per inch. There are three basic foam insulation board products on the.

4 8 7 21. Very good air bypass leak sealing properties. The r value at 180 day real time age and 75ºf mean temperature is. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3.

Phenolic foam spray insulation. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. 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.