Spray Foam Insulation R Value Per Inch Chart

With foamed in place insulation it is relatively easy though not inexpensive to fill wall and ceiling cavities completely.

Spray foam insulation r value per inch chart.

Most spray polyurethane foam is called two component foam. Corrosion problems when in contact with steel roofing moisture. Closed cell spray foam provides a higher r value per inch 6 5 than less expensive insulation types like cellulose and fiberglass 3 5 to 3 7. Closed cell spray foam has a far better r value per inch than other less effective insulations like cellulose fiberglass or even open cell foam.

Open cell spray foams are between 5 and 1 lbs per cubic foot and have an r value of 3 0 4 0 per inch of insulation. As a benchmark one inch of solid wood has an r value of 1. 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. R values are additive so you can multiple the number of inches of insulation thickness times the r value to arrive at a total insulation value.

Phenolic foam spray insulation. Closed cell spray foam insulation. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7. As always should you have any questions or require any assistance in planning your spray foam insulation job please contact us we are always happy to help.

R 0 77 30 phenolic foam insulation r values. The r value of. All these have r values ranging from r 3 2 to r 3 8 per inch. Open cell spray foam has an r value of about r 3 7 per inch while closed cell spray foam has an r value that may be as high as r 6 5 per inch.

Very good air bypass leak sealing properties. Open cell spray foam has an r value of about r 3 7 per inch while closed cell spray foam has an r value that may be as high as r 6 5 per inch. A typical 2 4 stud filled with open cell spray foam will have an r value. 4 5 21.

For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch. Note from this chart that the ideal r value differs for each part of your home. 4 8 7 21. 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.

The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. If you want to install spray foam in a stud wall and price is no object then it would seem to make sense to specify closed cell spray foam right. If you want to install spray foam in a stud wall and price is no object then it would seem to make sense to specify closed cell spray foam right.