Attached Underlay
1mm
Airborne Sound Transmission Loss
ASTM E90 & ASTM E413
w/drop ceiling STC 53 dB
without drop ceiling STC 50 dB
Impact Sound Transmission
ASTM E492 & ASTM E989
w/drop ceiling IIC 61dB
without drop ceiling IIC 55 dB
Change in Impact Sound Transmission (Delta)
ASTM E2179
ΔIIC 22 dB
Underlay Performance
ASTM E2179
ΔIIC 22 dB