Spray Foam R Values Per Inch

R value starting at 3 6 per inch.

Spray foam r values per inch.

Closed cell foam r values spray with an r value of 3 5 per inch per inch of thickness. Why spray foam insulation is so effective in meeting code requirements is that it has a higher r value per inch of product used. Starting at 5 5 per inch. Just like for open cell foam r values are additive.

Starting at 5 7 per inch. Low density or open cell spray foam. They sport an r value of 6 0 8 0 per inch of insulation about double their open cell foam counterparts. 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.

A 3 5 inch deep fiberglass rockwool or recycled denim batt for a typical 2 4 wall may say it provides r 11 or r 13 depending on fiber density. The r value of closed cell foam is r 6 5 7 per inch. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. Not used for interior application.

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. For 6 inches r 15 or r 19 etc. Air barrier sealant check. As a benchmark one inch of solid wood has an r value of 1.

What really matters is the r. The r value of. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. Jun 12 2017 in regards to closed cell sprayed in foam insulation r value can range between r 4 9 to r 7 1 per inch.

Closed cell spray foam insulation. Closed cell spray foams are between 2 and 4 lbs. Closed cell insulation products such fiberglass batt insulation standard fiberglass insulation batts or blankets provide an r value of 2 2 to 3 8 per inch of thickness. Closed cell spray foam r values.

Comparing fiberglass to foam fiberglass is the less expensive choice for wall insulation and is the spray foam insulation rental industrial spray foam insulation jun 12 2017 focusing on spray foam insulation materials there is a difference. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7. Closed cell spray foam has a far better r value per inch than other less effective insulations like cellulose fiberglass or even open cell foam. Closed cell roofing spray foam.

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. Medium density or closed cell spray foam. All these have r values ranging from r 3 2 to r 3 8 per inch. 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.