NFPA 275

1.1 Scope. 1.1.1* This method of fire tests for a thermal barrier for foam plastic insulation (herein referred to as thermal barrier) is applicable to building construction materials, products, or assemblies intended to be used to protect foam plastic insulation from direct fire exposure. 1.1.2 The performance of the thermal barrier is evaluated by its ability to limit the temperature rise on its unexposed surface and by the ability of the thermal barrier to remain intact in order to provide protection from ignition of the foam plastic insulation during a standard fire exposure.