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.
The tables below list constructions using the Maxi Series of 90mm brick. Three tables are available showing results (in order of improving performance) for constructions using:
- Single skin
- Solid wall
- Cavity brick
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:
| 90mm Sound Solutions* - Single Skin |
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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
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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
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| 90mm Sound Solutions* - Solid Wall |
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10mm mortar gap between leaves
Send Side:
No finish
Receive Side:
No finish
Discontinuous Construction: No
Wall Thickness: 190mm
Rw50 (-1;-5)
Rw = 50
Rw + Ctr = 45
ATF Report 1607
|
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10mm mortar gap between leaves
Send Side:
13mm sound resistant plasterboard directly fixed
Receive Side:
13mm sound resistant plasterboard directly fixed
Discontinuous Construction: No
Wall Thickness: 216mm
Rw53 (-1;-5)
Rw = 53
Rw + Ctr = 48
ATF Report 1608
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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
Rw56 (-1;-5)
Rw = 56
Rw + Ctr = 51
ATF Report 1609
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*These acoustic results should be used in conjunction with the specific details given in the test certificates or BCA deemed-to-satisfy descriptions.
| 90mm Sound Solutions* - Cavity Wall |
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40mm cavity
Send Side:
No finish
Receive Side:
No finish
Discontinuous Construction: Yes
Wall Thickness: 220mm
Rw52 (-7;-10)
Rw = 52
Rw + Ctr = 42
ATF Report 842
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Send Side:
13mm plasterboard screw fixed to resilient mounted furring channels
Receive Side:
13mm plasterboard directly fixed
Discontinuous Construction: Yes
Wall Thickness: 297mm
Rw52 (-2;-7)
Rw = 52
Rw + Ctr = 45
ATF Report 1073
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*These acoustic results should be used in conjunction with the specific details given in the test certificates or BCA deemed-to-satisfy descriptions.