Open Cell Spray Foam Insulation R Value Chart

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 foam insulation r value chart.

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. 3 inches of open cell foam r14 outperformed 11 inches r 32 of fiberglass cellulose and rockwool. Closed cell spray foam has the advantage of not requiring a vapor moisture barrier and it also sports a very high r value making it an ideal choice for insulating basements and first and second floors alike. Open cell spray foam insulation is air impermeable and is applied with a minimum of 3 5 on average and can be used for attics interior floors walls and soundproofing.

It has a lower r value per inch than closed cell foam and is vapor permeable. 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. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. 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.

Open cell spray foam typically has an r value of 3 5 per inch and it should be insulation is not required to meet the r value minimum listed in the chart above. The r value for open cell is typically around 3 7 at 1 thick and varies by manufacture. Closed cell open cell spray foam r values. Closed cell spray foam insulation.

R value is an important insulation term about measurement. The results were amazing. It measures the effectiveness at stopping energy loss by way of conduction one of the 3 forms of energy transfer. Use the following chart to estimate an ideal r value for your insulation project.