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.

R value spray foam thickness chart.

Open cell polyurethane spray foam 3 5 inches thick 12 6. It has a lower r value per inch than closed cell foam and is vapor permeable. Very good air bypass leak sealing properties. Closed cell spray foam insulation.

Phenolic foam spray insulation. Expanded polystyrene foam board. 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. Recommended home insulation r values.

R 0 77 30 phenolic foam insulation r values. Closed cell polystyrene spray foam 1 inch thick 6 5. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch. The higher the r value the better the thermal performance of the insulation.

For 6 inches r 15 or r 19 etc. When calculating the r value of a multilayered installation add the r values of the individual layers. 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. Insulation level are specified by r value.

A higher r value means that the insulation will do a better job of holding in conditioned air whether that s heat in the winter or cool air in the summer. 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. Closed cell spray foam r values. A typical 2 4 stud filled with open cell spray foam will have an r value between 10 5 and 14.

The r value depends on the type of insulation its thickness and its density. The r value of some insulations also depends on temperature aging and moisture accumulation. Understanding r value thursday december 13 2018 what does r value mean. 4 8 7 21.

Use the following chart to estimate an ideal r value for your insulation project. Polyiso insulation thickness r value chart. Corrosion problems when in contact with steel roofing moisture. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13.

4 5 21. R value is a measure of insulation s ability to resist heat traveling through it. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.