the assembly? Yes. The increased thermal value of the insulation could allow higher temperatures to build up in the supporting structural membranes during a fire, increasing the chances of assembly failure. • If an insulation manufacturer changes the formulation of its product, will roofing systems that have been granted UL approval using the insulation need to be retested to maintain their fire rating? The systems may need to be tested with the new insulation if the insulation formula is changed significantly. Using the information UL has collected about the effects of formula changes on fire-resistance, UL's engineers can determine whether a particular change is extensive enough to require additional testing. • Do any of UL's wind-uplift tests correspond to those
