What is the R Value of 2 Inch Foam Board?
The R value of 2 inch foam board insulation is approximately 6.5 per inch. This means that a 2 inch thick piece of foam board insulation has an R value of 13. The higher the R value, the better the insulation’s ability to resist heat flow.
Factors That Affect R Value
The actual R value of foam board insulation can vary depending on several factors, including the type and quality of the material used, as well as its thickness and density. Additionally, environmental factors such as temperature and humidity can also affect the R value.