Performance:
Tested on a timber subfloor with one layer of plasterboard directly fixed to the underside of joists.
Airborne Performance: (Higher figures indicate better performance)
- Sound Transmission Class (STC): 51dB (DnT,w)
- Weighted Sound Reduction Index (Rw+Ctr): 43dB (DnT,w+Ctr) - Includes correction for low-frequency performance.
Airborne sound reduction of untreated timber floor:
- STC: 38dB (DnT,w)
- Rw+Ctr: 25dB (DnT,w+Ctr)
Airborne improvement with treatment:
- STC Improvement: 13dB (DnT,w)
- Rw+Ctr Improvement: 18dB (DnT,w+Ctr)
Impact Performance: (Lower figures indicate better performance)
- Impact Sound Transmission Class (LNT,w): 51dB
Impact sound reduction of untreated timber floor:
Impact improvement with treatment:
Concrete Floor Performance:
Tested on a 200mm concrete slab.
Impact Performance: (Lower figures indicate better performance)
- Impact Sound Transmission Class (LNT,w): 47dB
Impact sound reduction of untreated concrete floor:
Impact improvement with treatment: