Spray Roofing R25 Value

Install a spray foam roofing system.

Spray roofing r25 value.

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. 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. Recommended home insulation r values.

Insulstar spray foam insulation is a spray. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch. Eco spray foam insulation. Ultimately selecting which product and value to use depends on many factors particularly thermal load.

Most of the time spray foam can be directly applied to existing roofing systems but in some cases a polyiso board is needed. The information on this page is based on data considered to be true and accurate based on periodic internal. It has less chemical off gassing during application. All these have r values ranging from r 3 2 to r 3 8 per inch.

Made with plant based products such as soy eco spray foam is more eco friendly. 10 it appears that the peak r value for all samples occurs when outdoor temperatures are closer to the indoor temperature i e. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. 1 when joints penetrations detailed appropriately.

A spray foam roofing system has an r value of 6 6 per sq. The icc es report for insulstar spray foam from ncfi esr 1615 issued february 1 2005 lists a maximum thickness of only 2 inches. 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. If you install 2 inches of iso board r 11 and 3 inches of spray foam r 19 8 you ll be over an.

The closed cell spray foam stops air infiltration and provides about an r 5 per inch. Less than 32 f or 0 c and solar heated. Between 36 f or 2 2 c and 108 f or 42 2 c. 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.

R value is a measure of insulation s ability to resist heat traveling through it. See also material data sheet msds 1511 or msds 1911. Closed cell spray foam insulation. 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.

Included is our r value guide detailing the suggested amount of insulation dependent upon zone as provided by the u s. The higher the r value the better the thermal performance of the insulation. Closed cell spray foam r values. Products with a higher r value provide greater insulation.