The sound solutions given in this section are only applicable to Austral Bricks NSW products. Bricks that are made using different manufacture techniques and raw materials will have different levels of acoustic performance.
CONSTRUCTION: Habitable to Wet
REQUIREMENTS: Rw + Ctr > 50
With discontinuous construction.
Walls separating a habitable room in one dwelling from a wet room in a second dwelling are required to have an Rw+Ctr of not less than 50 and to have a discontinuous construction. A wet room is a kitchen, bathroom, sanitary compartment or laundry. Discontinuous construction requires:
- A minimum 20mm cavity between two separate leaves
- Resilient wall ties such as those provided by Matrix Industries, if the wall is masonry, and
- No mechanical linkage if the leaves are not masonry.
The description given above is an aid only and the BCA should be referred to for the full requirements. Sound Solutions for this case are given below for:
- 110mm Standard Series
- Dry Press Series
- 90mm Maxi Series
- 150mm Through Wall Series
Test certificates are available on request. Sound or acoustic performance is measured by the weighted sound reduction index (Rw). The Rw value will increase as the acoustic performance of a material or construction improves. For further information on acoustic performance and the requirements of the building code, refer to either:
| 110mm (Standard Series) Sound Solutions* |
 |
Send Side:
13mm plasterboard directly fixed
Receive Side:
13mm plasterboard screw fixed to 70mm x 35mm timber studs 20mm from wall, with insulation
Discontinuous Construction: Yes
Wall Thickness: 226mm
Rw + Ctr ≥ 50
BCA Deemed
to Comply |
 |
Send Side:
13mm 'SoundStop' plasterboard screw fixed to furring channels, with insulation
Receive Side:
13mm 'SoundStop' plasterboard screw fixed to 51mm steel studs 20mm from wall, with insulation
Discontinuous Construction: Yes
Wall Thickness: 228mm
Rw 60 (-3;-10)
Rw = 60
Rw + Ctr = 50
ATF Report 1749 |
 |
Send Side:
13mm plasterboard directly fixed
Receive Side:
13mm plasterboard screw fixed to 64mm steel stud 15mm from wall, with insulation
Discontinuous Construction: Yes
Wall Thickness: 215mm
Rw 62 (-3;-9)
Rw = 62
Rw + Ctr = 53
ATF Report 1125 |
 |
Send Side:
10mm plasterboard screw fixed to 70mm x 30mm timber studs 15mm from wall, with insulation
Receive Side:
10mm plasterboard screw fixed to 70mm x 30mm timber studs 15mm from wall, with insulation
Discontinuous Construction: Yes
Wall Thickness: 300mm
Rw 65 (-6;-14)
Rw = 65
Rw + Ctr = 51
ATF Report 1398 |
 |
Send Side:
13mm 'SoundStop' plasterboard screw fixed to furring channels, with insulation
Receive Side:
13mm 'SoundStop' plasterboard and 10mm plasterboard screw fixed to 51mm steel studs 20mm from wall, with insulation
Discontinuous Construction: Yes
Wall Thickness: 238mm
Rw 65 (-4;-12)
Rw = 65
Rw + Ctr = 53
ATF Report 1750 |
 |
Send Side:
13mm plasterboard screw fixed to 64mm steel stud 15mm from wall, with insulation
Receive Side:
13mm plasterboard screw fixed to 64mm steel stud 15mm from wall, with insulation
Discontinuous Construction: Yes
Wall Thickness: 294mm
Rw 70 (-5;-13)
Rw = 70
Rw + Ctr = 57
ATF Report 1123 |
 |
50mm cavity, with insulation
Send Side:
No finish
Receive Side:
No finish
Discontinuous Construction: Yes
Wall Thickness: 270mm
Rw + Ctr ≥ 50
BCA Deemed
to Comply |
 |
50mm cavity
Send Side:
13mm render coating
Receive Side:
13mm render coating
Discontinuous Construction: Yes
Wall Thickness: 296mm
Rw + Ctr ≥ 50
BCA Deemed
to Comply |
*These acoustic results should be used in conjunction with the specific details given in the test certificates or BCA deemed-to-satisfy descriptions.
*These acoustic results should be used in conjunction with the specific details given in the test certificates or BCA deemed-to-satisfy descriptions.
| 90mm (Maxi Series) Sound Solutions* |
 |
Send Side:
Plasterboard directly fixed to 70mm x 35mm timber studs at 600mm centres 20mm from wall, with insulation
Receive Side:
Plasterboard directly fixed to 70mm x 35mm timber studs at 600mm centres 20mm from wall, with insulation
Discontinuous Construction: Yes
Wall Thickness: 296mm
Rw + Ctr ≥ 50
BCA Deemed
to Comply
|
 |
Send Side:
13mm plasterboard screw fixed to 64mm steel stud 15mm from wall, with insulation
Receive Side:
13mm plasterboard screw fixed to 64mm steel stud 15mm from wall, with insulation
Discontinuous Construction: Yes
Wall Thickness: 274mm
Rw 65 (-7;-14)
Rw = 65
Rw + Ctr = 51
ATF Report 1131 |
*These acoustic results should be used in conjunction with the specific details given in the test certificates or BCA deemed-to-satisfy descriptions.
| 150mm (through Wall Series) Sound Solutions* |
|
Send Side:
13mm plasterboard directly fixed
Receive Side:
13mm plasterboard fixed to 64mm steel studs 15mm from wall, with insulation
Discontinuous Construction: Yes
Wall Thickness: 255mm
Rw 60 (-2;-8)
Rw = 60
Rw + Ctr = 51
ATF Report 1115 |
*These acoustic results should be used in conjunction with the specific details given in the test certificates or BCA deemed-to-satisfy descriptions.