R 0 77 30 phenolic foam insulation r values.
Foam board insulation rigid insulation r value chart.
8 3 4 4 8 2 20.
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.
4 8 7 21.
Fiberglass insulation is less than half the price of rigid foam insulation when calculated by r value per square foot.
Foam board insulation types.
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.
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.
These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.
Very good air bypass leak sealing properties.
Phenolic foam spray insulation.
4 5 21.
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.
There is also less waste with fiberglass insulation.
Because of this i often get questions about which type of foam board insulation to use and what r values these products provide.