Opti 60 Acoustic Ceiling System (Concrete)

• High level of acoustic reduction
• 60 minute fire rating certificate
• Only 60mm depth off the underside of joists
• Multiple layers of acoustic mass
• Fail safe easy to install Maxi resilient bars
• dBoard technology

Remove the existing ceiling to reveal the cavity and underside of the concrete soffit. Ensure the soffit is structurally sound and in good condition. Install 50m timber battens into the underside of the concrete. Install 50mm Rockwool RWA45 insulation into the bottom of the cavity leaving air space above the insulation. Friction fit the insulation and make sure it is tightly packed. Make sure any gaps around the perimeter of the room are also insulated.

Install the Maxi resilient bars perpendicular to the joists at 300mm centres. Leave a 5mm gap at the perimeter of the ceiling so the Maxi resilient bars are not touching the walls. Fix the dBoard to the Maxi resilients bars using the Maxi HP screws. Install the dBoard in a brick bond pattern. Leave a 5mm expansion gap around the perimeter of the ceiling where it meets the wall and infill with acoustic sealant.

Over board the dBoard with 15mm Siniat Fireline Plasterboard. Try to stagger the joints over the dBoard, again lay in a brick bond pattern. Again leave a 5mm expansion gap around the perimeter and infill with acoustic sealant. The ceiling can now be finished by either wet plaster or tape and joint finish.