U.S. Cooler now offers a foamed-in-place urethane walk-in that meets the IBC 2603.4 thermal barrier code. U.S. Cooler passed the UL 1715 corner room burn test with Intertek/ETL, which is equivalent to the FM 4880 and NFPA 286 certifications. Our UL 1715 certified product is available upon request.