Building products: Flammability and smouldering resistance of loose-fill thermal insulation (NT FIRE 035) Posted onFebruary 14, 1988September 14, 2020Author Report #: NT FIRE 035 Approved: February 1988 Download pdf Size: 94.90 KB Abstract This test method specifies a procedure to determine the flammability and resistance to smouldering of thermal insulating materials. Categories