What would be the number one thing that sets apart Spray Foam from other types of Insulation?
If you go on the Government Energy Star website, they mention that one of the integral parts of an energy efficient home is thermal sealing. This can be seen here: https://www.energystar.gov/newhomes/explore_features_benefits/thermal_enclosure
One passage on their site that highlights the primary benefits of Foam Insulation is as follows:
“Properly Installed Insulation
It’s not just the amount of insulation; it’s the quality of installation that makes all the difference. Proper installation includes careful placement to eliminate gaps, voids, and compression; complete air barriers that prevent air from bypassing the insulation; and building techniques that minimize heat flow through framing. This ensures consistent temperatures throughout the house, reduced energy use, and increased comfort.”
Spray Foam, by its very nature, fills in all cracks, gaps and voids in a space. This creates a thermal seal, which, “ensures consistent temperatures throughout the house, reduced energy use, and increased comfort.”
This is something that no other standard Insulation can offer. The only types that provide this are premade and cost more than all other types of Insulation, including Spray Foam. So in the end, Spray Foam is the only choice when factoring in price and a thermal seal.