A material which, in the form in which it is used, is either one of the following; 1 Material of which no part will ignite and burn when subjected to fire Any material conforming to Standard No 4-1 UBC shall be considered noncombustible 2 Material having a structural base of noncombustible material with a surfacing material not over 1/B inch thick which has a flame-spread rating of 50 or less "Noncombustible" does not apply to surface finish materials Material required to be noncombustible for reduced clearances to flues, heating appliances or other sources of high temperature shall refer to noncombustible material
The material will not burn The glass fibers in PINK fiber glass insulation have a natural fire resistance, and are considered non-combustible when tested in accordance to ASTM E136