Rigid Foam Insulation R Value Chart

The r value at 180 day real time age and 75ºf mean temperature is.

Rigid foam insulation r value chart.

Other materials may only have a fifty percent increase in r value when their thickness is doubled. This material offers the highest r values about r 6 to 6 5. R 0 77 30 phenolic foam insulation r values. It provides r values that range from 3 6 to 4 2 per inch.

It provides about r 5 per inch. Very good air bypass leak sealing properties. 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. 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.

These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Foam board insulation types. Because of this i often get questions about which type of foam board insulation to use and what r values these products provide. 4 5 21.

Some products have reinforced facing to make them sturdier. Phenolic foam spray insulation. Choose this option for areas that need a good amount of strength and water resistance. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another.

In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and. As a benchmark one inch of solid wood has an r value of 1. 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. 1 844 446 7858 my account.

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. Corrosion problems when in contact with steel roofing moisture. 8 3 4 4 8 2 20. 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.

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. The common denominator among varieties of insulation is the r value. 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.