
Application
Sound InsulationSG-F12-2
Composite Sound Insulation Board
Composite sound insulation board for acoustic floor systems, combining 6mm and 12mm Fibre Cement Board layers with a 2mm IIR damping core. 20mm total thickness with 38 dB (Rw) sound reduction. Ideal for residential, studio, cinema and entertainment floor assemblies.
Product Description
SG-F12-2 Composite Sound Insulation Board is designed for acoustic floor systems. It combines a 6mm Fibre Cement Board (FCB) layer, a 2mm IIR (Isobutylene-Isoprene Rubber) damping core and a 12mm FCB layer, giving a total thickness of 20mm.
The two fibre cement layers provide mass and stiffness, while the IIR core damps vibration within the board. This composite construction delivers a weighted sound reduction index of 38 dB (Rw), making SG-F12-2 suitable for sound insulation within floor assemblies in homes, recording studios, cinemas, KTV venues and hotels.
Product Engineering Principle & Performance

Project Gallery
Product Engineering Principle
SG-F12-2 uses a dual fibre cement construction with an IIR damping core for acoustic floor systems:
- 6mm FCB (Fibre Cement Board) - Outer layer providing mass and stiffness.
- 2mm IIR Damping Layer - Damps vibration between the two fibre cement layers.
- 12mm FCB (Fibre Cement Board) - Second outer layer completing the composite construction.
The 6+2+12mm configuration combines sound insulation and vibration damping in a 20mm board for integration into acoustic floor assemblies.
Why Choose SG-F12-2?
SG-F12-2 pairs two fibre cement layers with a 2mm IIR damping core, bringing sound insulation and vibration damping together in a board designed for acoustic floor systems.
Key Benefits
- 38 dB (Rw) Sound Reduction: Helps reduce airborne sound transmission through the board.
- Designed for Floor Systems: Suited to acoustic floor assemblies in residential, commercial and entertainment spaces.
- Dual Fibre Cement Layers: The 6mm and 12mm FCB layers provide mass and stiffness within the composite board.
- IIR Damping Core: A 2mm rubber layer helps damp vibration between the fibre cement layers.
- Versatile Installation: Can be cut with a saw, drilled and secured with self-tapping screws.
- 20mm Profile: Combines the three layers in a single board for integration into the floor build-up.
Technical Innovation
The fibre cement layers combine different thicknesses with the damping action of IIR. Together, these materials help limit sound transmission and vibration within the composite board as part of an acoustic floor system.
Installation Methods
SG-F12-2 can be cut to size with a saw, drilled and secured with self-tapping screws. Install the board as part of the specified acoustic floor system, with the supporting layers, fixing method and joint details selected to suit the project.
Recommended Applications
SG-F12-2 is designed for floor systems in spaces requiring acoustic separation:
- Residential: Acoustic floor assemblies in homes and apartments.
- Professional: Recording studio floor systems.
- Entertainment: Cinema, club and KTV floor assemblies.
- Hospitality: Acoustic floor systems in hotels.





