Lightweight and pre-assembled, Arxx ICFs save builders time and money by providing formwork, framing, insulation, a vapor barrier, and strapping all in one step. The completed walls have a thermal resistance of R-22, the maker says. The product provides an STC rating of up to 50 or higher, is wind resistant up to 150 mph, and has a two- to four-hour UL/ULC fire resistance rating. 800.293.3210.