Regupol 4515 Acoustic Underlay
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      Will Regupol 4515 meet the NZBC requirements?

      Under G6.3.2 the IIC requirement shall be no less than 55. FIIC shall be within 5db of the (55) performance requirements. It is very important to understand that Regupol 4515 is only a part of the overall sound insulation system. The insulation capabilities of the Regupol 4515, when combined with the individual insulation capabilities of, say, the concrete floor, the cavity insulation, the ceiling insulation etc., should attain the overall IIC or FIIC requirement.