R Value Spray Foam Thickness Chart

These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.

R value spray foam thickness chart.

Why spray foam insulation is so effective in meeting code requirements is that it has a higher r value per inch of product used than batts. Recommended home insulation r values. 8 3 4 4 8 2 20. A typical 2 4 stud filled with open cell spray foam will have an r value between 10 5 and 14.

Closed cell spray foam insulation. Open cell polyurethane spray foam 3 5 inches thick 12 6. Closed cell polystyrene spray foam 1 inch thick 6 5. Insulation level are specified by r value.

R 0 77 30 phenolic foam insulation r values. The r value of some insulations also depends on temperature aging and moisture accumulation. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch. Phenolic foam spray insulation.

Corrosion problems when in contact with steel roofing moisture. Polyiso insulation thickness r value chart. 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. Use the following chart to estimate an ideal r value for your insulation project.

R value is a measure of insulation s ability to resist heat traveling through it. The r value depends on the type of insulation its thickness and its density. The higher the r value the better the thermal performance of the insulation. When calculating the r value of a multilayered installation add the r values of the individual layers.

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. It has a lower r value per inch than closed cell foam and is vapor permeable. Closed cell spray foam r values. 4 5 21.

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. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. Understanding r value thursday december 13 2018 what does r value mean. 4 8 7 21.

Very good air bypass leak sealing properties. For 6 inches r 15 or r 19 etc. Expanded polystyrene foam board.