What is the R-value of 1 inch foam board?
STYROFOAM extruded polystyrene insulation is rated at an R-value of 5.0 per inch at 75°F.
What is the R-value of 1 1 2 foam board?
x 4 ft. x 8 ft. R-7.5 Scored Squared Edge Rigid Foam Board Insulation Sheathing.
How much does insulation foam board cost?
The cost of foam board insulation ranges from about 30 cents per square foot to close to $1.00 depending on the type and thickness of the board. When an insulation contractor installs the insulation, the total cost of materials plus installation is $1.50 to $5.50 for most projects.
What is R-value of foam board?
It provides an R-value of 6 per inch of thickness and often comes foil-faced to help reflect radiant heat.
Does foam board insulation need an air gap?
If you plan to fill the stud bays with airpermeable insulation (fiberglass batts, blown-in fiberglass, mineral wool, or cellulose), the material you use to create the air gap needs also to be an air barrier. The most common choice is rigid foam. The idea is to create an air gap between the siding and the rigid foam.
Which foam board has the highest R-value?
Polyisocyanurate: Known as polyiso for short, polyisocyanurate foam has the highest R-value per inch (R-6.5 to R-6.8) of any rigid insulation. This type of rigid foam usually comes with a reflective foil facing on both sides, so it can also serve as a radiant barrier.
How much does a foam board cost?
Generally, open-cell spray foam costs about $0.44 to $0.65 per board foot, according to Green Building Advisor, while closed-cell costs about $0.70 to $1 per board food.
Which rigid insulation should I Choose?
Choose the right type of rigid foam for your needs. When choosing rigid foam insulation, you have three main options: Polyisocyanurate: Known as polyiso for short, polyisocyanurate foam has the highest R-value per inch (R-6.5 to R-6.8) of any rigid insulation.
What is the best rigid insulation?
Expanded polyurethane (EPU) serves as the best rigid foam insulation for creating insulated concrete forms ( ICF ). These ICFs replace traditional wooden forms, and act as a mold for freshly poured concrete.
Where can you buy foam board?
You can buy foam board online or in a BM office supply store like Office Depot or Office Max. I got some at Target where they keep the construction paper, color markers, etc. Hugh_G_Rection wrote: I got some at Target where they keep the construction paper, color markers, etc.