Polyurethane Foam Insulation R Value

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.

Polyurethane foam insulation r value.

Choose foam it green spray foam insulation kits and don t settle for less than you deserve. 4 5 21. 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. 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.

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. 1 per bsaf 1 cu ft. Corrosion problems when in contact with steel roofing moisture. Lower strength and rigidity.

8 3 4 4 8 2 20. 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. By expanding 100 times its original size icynene seals cracks and gaps in attics walls ceilings and other spaces where air might escape.

Spray foam kits are quicker and easier to use plus you get a seamless air barrier and high r value in just 1 inch. Higher strength and rigidity. 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. Phenolic foam spray insulation.

Eps has an r value of 3 85 at 75 degrees f. Expect an r value of about 3 6 per inch. There are two types of polyurethane spray foam insulation. 4 8 7 21.

In comparison glass wool typically has an r value of only r 3 to r 4 per inch. 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. 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. Polyurethane is a closed cell foam insulation material that initially contains a low conductivity gas in its cells.

The r value goes up as the temperature drops. 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.