scope:

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.

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.

Purpose. Two fire tests are conducted to determine the fire performance of the thermal barrier: Part I, Temperature Transmission Fire Test, and Part II, Integrity Fire Test.

Part I measures the temperature rise on the unexposed face of the thermal barrier when it is subjected to a standard fire exposure specified in NFPA 251, ASTM E 119, or UL 263.

Part II evaluates the ability of the thermal barrier to remain intact in order to provide protection from ignition of the foam plastic insulation by conducting a test of the thermal barrier and foam plastic insulation assembly in accordance with a standard room/corner fire test method.