Foam Board Insulation High R Value

Install it anywhere from the roof to the foundation.
Foam board insulation high r value. 8 3 4 4 8 2 20. Rigid insulation is one of the best tools to reduce your energy costs. Corrosion problems when in contact with steel roofing moisture. They keep your home at a comfortable temperature without the need to crank your heat.
Foam board insulation types. Because of this i often get questions about which type of foam board insulation to use and what r values these products provide. R 0 77 30 phenolic foam insulation r values. 4 5 21.
You can even place it under the foundation slab. 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. High r cw plus insulation is a rigid closed cell xps board. Barrier ultra r super high r building panels produced by glacier bay use aerogel and are rated up to r 30 per inch or in barrier ultra r panels r 50 per inch.
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 are three basic foam insulation board products on the. 4 8 7 21. The main advantage of high r cw plus insulation over other xps boards is its higher r value per inch.
Very good air bypass leak sealing properties. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Phenolic foam spray insulation.