Rigid Foam Insulation R Value Chart

There are three basic foam insulation board products on the.

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. 4 8 7 21. Because of this i often get questions about which type of foam board insulation to use and what r values these products provide. The r value at 180 day real time age and 75ºf mean temperature is.

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. 4 5 21. It provides r values that range from 3 6 to 4 2 per inch. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another.

Corrosion problems when in contact with steel roofing moisture. Foam board insulation types. 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. As a benchmark one inch of solid wood has an r value of 1.

1 844 446 7858 my account. It provides about r 5 per inch. Phenolic foam spray insulation. 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.

Choose this option for areas that need a good amount of strength and water resistance. 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. Some products have reinforced facing to make them sturdier. R 0 77 30 phenolic foam insulation r values.

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. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. 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. This material offers the highest r values about r 6 to 6 5.

The common denominator among varieties of insulation is the r value. Very good air bypass leak sealing properties. 8 3 4 4 8 2 20.