Foam Board Insulation Rigid Insulation R Value Chart

For example insulating a 10 square foot wall area to r 15 costs about 3 40 to 4 00 with fiberglass insulation while a comparable r value for rigid foam costs roughly 10.

Foam board insulation rigid insulation r value chart.

4 8 7 21. R 0 77 30 phenolic foam insulation r values. Corrosion problems when in contact with steel roofing moisture. Polyiso rigid insulation r value chart written by kupis on may 7 2020 in chart r value chart caflei closed cell and open insulation r values in pir roof insulation embly 5 interior insulated cmu wall gm 0702 to insulating sheathing.

There are three basic foam insulation board products on the. 8 3 4 4 8 2 20. Very good air bypass leak sealing properties. 1 844 446 7858 my account.

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. There is also less waste with fiberglass insulation. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Because of this i often get questions about which type of foam board insulation to use and what r values these products provide.

Fiberglass insulation is less than half the price of rigid foam insulation when calculated by r value per square foot. Phenolic foam spray insulation. 4 5 21.