underlay iic

  1. M

    Floating floor underlay of IIC 65 as a minimum

    Just got my under knocked back advising it needs an IIC of 65 or above for multi story complex. The underway I had gone for is the quietwalk which has an IIC of 58. Not many high rise complexes I know of asks for a min of 65. I think the BCA standard is like 55 or something. Anyone know...
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