VGW84T Birch Birch Effect

Acoustic Rating System

Karndean Designflooring consults Marshall Day Acoustics to provide acoustic prediction reports.


In accordance with the New Zealand Building Code (NZBC), Clause G6.3.2 requires the  impact insulation class of a floor to be no less than 55dB. Using ASTM E492-09 Standard Test Method for Laboratory Measurement of Impact Sound Transmission, Karndean LooseLay achieves an IIC rating of 56dB. This makes it suitable for multi-rise developments and design throughout New Zealand.


The rating system complements the established statutory and advisory codes such as the New Zealand Building Code, AS/NZS Standards or local authority building ordinances.