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.
Polyurethane foam r value per inch.
Why spray foam insulation is so effective in meeting code requirements is that it has a higher r value per inch of product used.
Foam board insulation.
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.
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.
The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13.
Note that the material the insulation is made from will change the r value as well.
The r value of.
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.
Closed cell spray foam r values.
This product typically has an r value of 3 6 to 4 0 per inch of thickness.
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.
Blown in or loose fill insulation.
Closed cell spray foam insulation.
Vacuum insulated panels have the highest r value approximately r 45 in u s.
Closed cell foam offers the best r value per thickness of any insulation at about 6 5 per inch.
A typical 2 4 stud filled with open cell spray foam will have an r value.
Expanded polystyrene foam eps is the cheapest and least used foam board product on the market.
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.
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.
Insulation blankets batts and rolls spray foam 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 has a glue like consistency adding structural integrity to any wall or ceiling you apply it to.
Here are the installation methods from lowest to highest average r value per inch.
This option is pricier than open cell foam but because it provides better r value per inch and also acts as a vapor.
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.
All these have r values ranging from r 3 2 to r 3 8 per inch.
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.
