Extruded polystyrene foam (XPS) also known as blue board or pink board comes in many different thicknesses and edge profiles. This insulation board is probably one of the most widely used foam board insulation products in the residential construction industry. XPS has an R value of 4.5 to 5.0 per inch of thickness.

What is the R-value of 2 inch blue STYROFOAM?

A wall utilizing STYROFOAM T-MASS Technology with a 2-inch exterior layer and a 4-inch interior layer of concrete along with a 2-inch layer of STYROFOAM extruded polystyrene insulation would result in a material R-value of approximately 11.33.

What is the R-value of blue foam board?

There are generally two types of foam board products available in the market today, pink and blue foam boards. They are both manufactured using polystyrene resin and perform virtually in a similar manner. They have an insulating R value of 5 per inch of thickness.

What is the highest R-value foam board insulation?

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 R-value of 1 inch thick Styrofoam?

STYROFOAM extruded polystyrene insulation is rated at an R-value of 5.0 per inch at 75°F.

Why R-value is Important for Foam Board Insulation

What is the R-value of 3/4 inch Styrofoam insulation?

STYROFOAM/BLUE BOARD 3/4" 4'X8' DOW R-VALUE: 4.0 (SQUARE EDGE)/ P2S FACING.

Does foam board insulation need a vapor barrier?

Foam insulation usually does not require a vapor barrier. For some foam insulation types, such as closed-cell spray foam and foam board insulation, the insulation itself stops the movement of most water vapor.

What is the R-value of 2 inch foam insulation?

With an R-value of 13.1 for a 2" thick sheet only two 2" sheets are required to achieve R-25. 2. Extruded polystyrene or XPS (foam is usually pink or blue) XPS has an R-value of 5 per inch of thickness requiring 5" of insulation to achieve R-25.

What is the R-value of packing styrofoam?

Expanded polystyrene foam (EPS) is the cheapest and least used foam board product on the market. This product typically has an R value of 3.6 to 4.0 per inch of thickness.

What is blue styrofoam used for?

Styrofoam is a trademarked brand of closed-cell extruded polystyrene foam, or XPS. This foam is also referred to as “Blue Board” and is used for building insulation, thermal insulation and water barriers.

What is the R-value of rigid foam board?

Rigid foam R-values range from R-1 for 1/4-inch thick sheathing panels to R-15 for 3-inch thick panels. R-value is not entirely a function of the thickness of the material, as the facing material and type of foam used will affect the R-value of the material.

What is the R-value of foil board?

Attached to the face of studs, FOILBOARD® INSULATION PANEL eliminates thermal bridging through the frame and air infiltration. Without insulation a cavity brick wall has an 'R' value of 0.5. FOILBOARD® INSULATION PANEL in the cavity will achieve R1. 8 with STANDARD 10 and R2.

Can Styrofoam be used as house insulation?

Styrofoam is also a material that has great insulating properties.

Do you put Tyvek over insulation board?

DuPont™ Tyvek® wraps can be installed UNDER or OVER exterior foam insulation. The DuPont™ Tyvek® wrap should be installed on the same plane as the window flanges to allow for the most effective installation.

Does house wrap go over or under foam board?

If you choose to install house wrap with rigid foam, generally, it should go under the insulation, not around it.

What is the R-value of spray foam in a 2x4 wall?

Open-cell spray foam absorbs and holds water. It has a lower R-value per inch than closed-cell foam and is vapor-permeable. The R-value is R-3.5 to R-3.6 per inch, so filling a 2×4 cavity yields about an R-13.

What is the R-value of 1 inch of closed cell spray foam?

This microscopic difference in the two products creates a dramatic difference in performance. Closed cell spray foam has an R-value of R-7 per inch. In comparison, open cell spray foam has an R-value of R-3.8 per inch. Additionally, the materials have decidedly different densities.

How thick is r30 insulation?

8¼ ” thick, R-30C EcoTouch® Thermal Batt insulation prevents moisture damage and helps assure long roof life by providing 1" of ventilation air space between the insulation and roof deck. Easy Installation R-30C EcoTouch® Thermal Batt insulation is easy to handle and install.

What is better foam or fiberglass insulation?

Spray foam insulation has a higher R-value than fiberglass, making it a better insulator. Another difference between them is that spray foam is watertight while fiberglass cracks under moisture. However, installing spray foam requires a professional while fiberglass is easy to install yourself.

How good is STYROFOAM insulation?

Styrofoam is made mostly of air, meaning it is a poor conductor of heat, but an excellent convector. It traps the air in small pockets, blocking the flow of heat energy. This reduces both conduction and convection and makes Styrofoam a good insulator.

Is foam sheet insulation better than fiberglass?

Made from polymers like polyurethane and polystyrene, rigid foam boards are denser, more expensive, and offer better resistance to heat flow than fiberglass. Conversely, fiberglass insulation is cheaper and more flexible, as it is made from raw materials like limestone, silica sand, and recycled glass.

Which side of foam board insulation faces out?

The reflective side of the board should be oriented to the exterior and the non- reflective white side should be oriented to the interior. EXCEPTION: If vinyl siding is to be installed over AP™ Foil- Faced sheathing, install foam boards with the white nonreflective side toward the vinyl siding.