between 1.46 m²K/W and 1.34 m²K/W (0.26 °F·ft²·h/BTU and 0.24 °F·ft²·h/BTU for 1.97-inch thickness).

UFFI is a foam with similar consistency to shaving cream, that is easily injected or pumped into voids. It is normally made on site using a pump set and hose with a mixing gun to mix the foaming agent, resin, and compressed air. The fully expanded foam is pumped into areas in need of insulation. It becomes firm within minutes, but