Making the Case for Spray Foam: A Look at How Spray Foam Maximizes Builder, Homeowner Efficiency

While SPF has a higher upfront cost, it offers substantial efficiency — from R-value per inch to installation process and lifetime energy savings.

source https://www.achrnews.com/articles/142406-making-the-case-for-spray-foam-a-look-at-how-spray-foam-maximizes-builder-homeowner-efficiency