Polyurethane Foam Insulation R Value

Lower strength and rigidity.

Polyurethane foam insulation r value.

There are two types of polyurethane spray foam insulation. Expect an r value of about 3 6 per inch. Spray foam kits are quicker and easier to use plus you get a seamless air barrier and high r value in just 1 inch. If you d like to start saving money and time today buy foam it green spray foam insulation now or call us at 800 516 0949.

Polyurethane is a closed cell foam insulation material that initially contains a low conductivity gas in its cells. Eps has an r value of 3 85 at 75 degrees f. Open cell foam cells are not as dense and are filled with air which gives the insulation a spongy texture and a lower r value. The r value goes up as the temperature drops.

Choose foam it green spray foam insulation kits and don t settle for less than you deserve. 4 8 7 21. Like polyiso foam the r value of closed cell polyurethane insulation can drop over time as some of the low conductivity gas escapes and air replaces it in a phenomenon known as thermal drift or ageing. Open cell foam is permeable to moisture but impermeable to air.

8 3 4 4 8 2 20. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. 4 5 21. Phenolic foam spray insulation.

Air barrier at full wall thickness. Higher r value greater than 6 0 per inch r value approximately 3 5 per inch high moisture barrier lower moisture permeability lower moisture barrier higher moisture permeability air barrier. Higher strength and rigidity. Very good air bypass leak sealing properties.

Important for people living in the north such as minnesota is that the r value at 0 degrees f is 4 55. This makes it ideal for insulating roof assemblies that need to dry inward. R 0 77 30 phenolic foam insulation r values. Corrosion problems when in contact with steel roofing moisture.

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. As a result of the high thermal resistance of the gas spray polyurethane insulation typically has an initial r value around r 3 4 to r 6 7 per inch. Icynene sprayed in foam is an insulation and air seal system that works to help ensure that your home doesn t suffer from air loss while providing an effective r value.