Open Cell Foam R Value

Open cell spray foam has an r value of about r 3 7 per inch while closed cell spray foam has an r value that may be as high as r 6 5 per inch.

Open cell foam r value.

The r value for open cell spray foam is between r 3 5 r 3 6 per inch. The open cell structure of low density foam insulation means the r value is lower than its closed cell counterpart. However there are open cell spray foam insulation products actually offer r 3 7 per inch such as icynene classic and icynene classic max. Some products have reinforced facing to make them sturdier.

It performs much better than any form of batt for stopping air flow but it is not as complete of an air seal as closed cell spray foam. Closed cell spray foam insulation. If you want to install spray foam in a stud wall and price is no object then it would seem to make sense to specify closed cell spray foam right. Open cell spray foams are between 5 and 1 lbs per cubic foot and have an r value of 3 0 4 0 per inch of insulation.

R values are additive so you can multiple the number of inches of insulation thickness times the r value to arrive at a total insulation value. It provides about r 5 per inch. Open cell spray foam has an r value of about r 3 7 per inch while closed cell spray foam has an r value that may be as high as r 6 5 per inch. Can be installed at a significantly lower cost and target the same specified r value can achieve greater r value if not restricted by space.

Closed cell foam can also increase the racking strength of attic walls which. Open cell spray foam interior applications. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. Will accommodate long term creep and seasonal movement.

This material offers the highest r values about r 6 to 6 5. Choose this option for areas that need a good amount of strength and water resistance. Some are partly made from bio based raw materials such as soybean oil rather than petrochemicals. It provides r values that range from 3 6 to 4 2 per inch.

Open cell foam insulation values r3 r4. Lower raw material resource use. This is significantly lower than closed cell foams which can limit open cell insulations usefulness in extreme temperature conditions. Open cell spray foam typically has an r value of 3 5 per inch and it should be noted that open cell does not form a tight air seal.

If you want to install spray foam in a stud wall and price is no object then it would seem to make sense to specify closed cell spray foam right. Open cell spray foam absorbs and holds water. Open cell foam has an r value of about 3 5 to 3 7 per inch while closed cell foam has an r value of about 6 per inch.