Enduro-Kote is designed for plywood substrates, and as a part of ICC-ES . Evaluation Service, Inc. (ICC-ES) Evaluation Report Number 2245, the system has a Class A Roof Classification and is One Hour Fire Resistive over 5/8″ exterior grade plywood with 2×10, or 2×8 floor joists spaced 16″ on center. The Enduro-Kote System has a Ten Year Limited Warranty.