Spray Foam Insulation R Value 2x6

This gives you great r value a continuous thermal envelope and.

Spray foam insulation r value 2x6.

For 6 inches r 15 or r 19 etc. The low density spray foam wall decreases from an installed insulation r value of 21 to a whole wall r value of approximately r 16. After a ton of geeking out about wall assemblies including reading lots of articles and speaking with insulation experts builders and energy consultants my favorite assembly is nail base insulation zip r or atlas nail base on 2x4 or 2x6 framing with about 3 of spray foam. Spray foam kits are quicker and easier to use plus you get a seamless air barrier and high r value in just 1 inch.

In your case you have a total r value of about r 27 8 and 41 of 27 8 would be r 11 4 but in fact you have about r 13 of closed cell spray foam which is more than r 11 4 so you are good. The r value of the high density spray foam wall decreases from an installed r value of r 30 to approximately r 20 a decrease of r 10 because of thermal bridging. 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. If the house is constructed with 2x6 studs the r value when insulating with open cell foam can reach a maximum of r 20.

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. Our open cell foam product has an r value of 3 5 per inch and in most applications a house constructed with 2x4 studs will have 3 5 inches of open cell foam thus resulting in a total r value of 12. Open cell foam insulation values r3 r4. 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.

Why spray foam insulation is so effective in meeting code requirements is that it has a higher r value per inch of product used than batts. If you want to install spray foam in a stud wall. Closed cell spray foam r values. Spray foam insulation vs fiberglass r value is about equal for open cell insulation and about double for closed cell insulation per one inch layer.

2x6 frame looking at interior insulation and thinking chris s argument for flash and batt. 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. Choose foam it green spray foam insulation kits and don t settle for less than you deserve. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch.

Considering diy blown fiberglass insulation vs spray foam both require care to get the thickness right.