Soil & Waste, and Stormwater pipes passing though more than one sole-occupancy unit

The Australian Building Codes Board (ABCB) published the latest update of the National Construction Code (NCC / BCA) in 2019 establishing the minimum performance requirements for various building types.  Part F5 Sound Transmission and Insulation nominates that for a Soil & Waste or Stormwater pipe passing through more than one sole-occupancy unit the pipe must be separated from the unit by a construction with an Rw+Ctr (airborne) not less than –
(i)40 if the adjacent room is a habitable room (other than a kitchen); or
(ii)25 if the adjacent room is a kitchen or non-habitable room.

The Akatherm dBlue Soil & Waste system system has been independently assessed by acoustic consultants Acoustic Logic to satisfy the minimum performance requirements of the NCC/BCA when installed as per the following details.

Refer to the Certification & Approvals tab below;

Adjacent to a habitable room (other than a kitchen) 

  • Option 1 - Rw + Ctr 40 (equivalent)

    Notes

    • Minimum 100mm gap between the bottom of the dBlue pipe and the top surface of the ceiling
    • 75mm thick 32kg/m3 density glass wool insulation laid continuously on a minimum 13mm thick
    • plasterboard ceiling for a minimum of 600mm measured horizontally from the pipe with batts tightly butted or overlapped
    • There are no more than 4 untreated light penetrations for every 6m2 of ceiling
    • There are no other penetrations in the ceiling

     

  • Option 2 - Rw + Ctr 40 (equivalent)

    Notes

    • dBlue pipe is wrapped with 55mm thick R1.3 glasswool insulation with heavy duty foil equal to Bradford Heavy Duty Anticon within habitable ceilings
    • Minimum 100mm gap between the bottom of the dBlue pipe and the top surface of the ceiling
    • 75mm thick 11kg/m3 density glass wool insulation laid continuously on a minimum 13mm thick plasterboard ceiling for a minimum of 600mm measured horizontally from the pipe with batts tightly butted or overlapped
    • There are no more than 4 untreated light penetrations for every 6m2 of ceiling
    • There are no other penetrations in the ceiling

Adjacent to a combination of wet and habitable areas

  • Option 1 - Rw + Ctr 40 (equivalent)

    Notes

    • Maintain minimum 10mm, maximum 15mm gap, caulked to depth of sheet with Selleys Proseries Fireblock. Ensure that sealant is tooled in flush
    • Penetrations in the bathroom perimeter walls are to be acoustically treated
  • Option 2 - Rw + Ctr 40 (equivalent)

    Notes

    • Maintain minimum 10mm, maximum 15mm gap, caulked to depth of sheet with Selleys Proseries Fireblock. Ensure that sealant is tooled in flush
    • Penetrations in the bathroom perimeter walls are to be acoustically treated

Adjacent to a kitchen or non-habitable room