Polyurethane Foam R Value Per Inch

It has a glue like consistency adding structural integrity to any wall or ceiling you apply it to.

Polyurethane foam r value per inch.

Additional r value for a masonry wall constructed using these materials needs to add the insulating value of additional wall components typically included such as 1 solid foam polyisocyanurate r 8 extruded polystyrene r 5 expanded polystyrene r 4 or 1 of perlite r 2 7 and for an exterior air film winter no wind r 0 17 an interior. 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. This product typically has an r value of 3 6 to 4 0 per inch of thickness. 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.

Vacuum insulated panels have the highest r value approximately r 45 in u s. Expanded polystyrene insulation is similar to the foam used for packing peanuts and it s typically used for insulated concrete forms also knows as icf s. 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. All these have r values ranging from r 3 2 to r 3 8 per inch.

Closed cell spray foam r values. Why spray foam insulation is so effective in meeting code requirements is that it has a higher r value per inch of product used. Here are the installation methods from lowest to highest average r value per inch. Insulation blankets batts and rolls spray foam insulation.

Closed cell foam offers the best r value per thickness of any insulation at about 6 5 per inch. For 6 inches r 15 or r 19 etc. 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. The r value of.

Foam board insulation. Expanded polystyrene foam eps is the cheapest and least used foam board product on the market. A typical 2 4 stud filled with open cell spray foam will have an r value. Blown in or loose fill insulation.

This option is pricier than open cell foam but because it provides better r value per inch and also acts as a vapor. Radiant barriers and vapor barriers are not rated by. 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. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13.

Closed cell spray foam insulation. 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. Aerogel has the next highest r value about r 10 to r 30 per inch followed by polyurethane pur and phenolic foam insulations with r 7 per inch.