Foam board insulation types.
Foam insulation r value chart.
It measures the effectiveness at stopping energy loss by way of conduction one of the 3 forms of energy transfer.
In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and.
The common denominator among varieties of insulation is the r value.
R value is the only measurement used in building codes today however it is not the only way to stop energy loss.
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.
Recommended home insulation r values.
The higher the r value the better the thermal performance of the insulation.
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.
I ve written several posts about how to insulation basement walls in which i promote the use of foam board insulation as the first line of defense against moisture and mold.
Installing more insulation in your home increases the r value and the resistance to heat flow.
Very good air bypass leak sealing properties.
The table below shows what levels of insulation are cost effective for different climates and.
It has a lower r value per inch than closed cell foam and is vapor permeable.
4 5 21.
As a benchmark one inch of solid wood has an r value of 1.
There are three basic foam insulation board products on the.
4 8 7 21.
These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.
When calculating the r value of a multilayered installation add the r values of the individual layers.
Phenolic foam spray insulation.
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 has a far better r value per inch than other less effective insulations like cellulose fiberglass or even open cell foam.
Because of this i often get questions about which type of foam board insulation to use and what r values these products provide.
The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13.
8 3 4 4 8 2 20.
Closed cell spray foam insulation.
Corrosion problems when in contact with steel roofing moisture.
R 0 77 30 phenolic foam insulation r values.
Closed cell open cell spray foam r values.
Insulation level are specified by r value.
Rmax r matte plus 3 1 2 in.
R value is an important insulation term about measurement.
The r value of some insulations also depends on temperature aging and moisture accumulation.
