Spray Roofing R25 Value

Eco spray foam insulation.

Spray roofing r25 value.

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. The information on this page is based on data considered to be true and accurate based on periodic internal. See also material data sheet msds 1511 or msds 1911. Using spray foam products.

R value is a measure of insulation s ability to resist heat traveling through it. Insulthane 100 has an r value of 3 23 per inch the maximum thickness of 5 inches yields an r value of about 17 8. The closed cell spray foam stops air infiltration and provides about an r 5 per inch. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch.

It has less chemical off gassing during application. 2 stated thermal resistance values are based upon conditioning requirements and test methodology found in astm c1289 and astm c518 for foil faced polyisocyanurate insulation. Ultimately selecting which product and value to use depends on many factors particularly thermal load. Install a spray foam roofing system.

The icc es report for insulstar spray foam from ncfi esr 1615 issued february 1 2005 lists a maximum thickness of only 2 inches. Recommended home insulation r values. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. Products with a higher r value provide greater insulation.

Included is our r value guide detailing the suggested amount of insulation dependent upon zone as provided by the u s. Less than 32 f or 0 c and solar heated. Insulation level are specified by r value. 1 when joints penetrations detailed appropriately.

The higher the r value the better the thermal performance of the insulation. A spray foam roofing system has an r value of 6 6 per sq. All of the samples show a decrease in r value as outside temperatures go below freezing. Regardless ashrae s new above deck roof insulation standard is a good place to start as it jumped 33 percent from r 15 to r 20 in five of six climatic regions.

Between 36 f or 2 2 c and 108 f or 42 2 c. Insulstar spray foam insulation is a spray. If you install 2 inches of iso board r 11 and 3 inches of spray foam r 19 8 you ll be over an. Most of the time spray foam can be directly applied to existing roofing systems but in some cases a polyiso board is needed.

Also included is the hugely helpful insulation zip code calculator that spells out the suggested amount of r value necessary for the different portions of a structure like foundation interior and. 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 spray foam insulation. 10 it appears that the peak r value for all samples occurs when outdoor temperatures are closer to the indoor temperature i e.