Sound Solutions for Sole Dwelling to Public Area Cases

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 Corridor or Public Area
REQUIREMENTS: Rw > 50
With discontinuous construction (if lift shaft or plant room)

The BCA requires that walls in Class 2 or 3 buildings that separate a sole-occupancy unit from a public area (plant room, lift shaft, stairway, public corridor, public lobby or the like) must have an Rw of not less than 50. In addition, if the wall separates the sole-occupancy unit from a plant room or a lift shaft, the construction must be discontinuous. 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.

Discontinous construction is marked with a  in the tables of results. 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

• Technical Info Sheet: Sound Transmission
• Brick Manual 1: Fire Resistance and Acoustic Properties

110mm (Standard Series) Sound Solutions*
	Send Side: 13mm render Receive Side: 13mm render Discontinuous Construction: No Wall Thickness: 136mm   Rw 50 (-1;-5) Rw = 50 Rw + Ctr = 45 ATF Report 1904
	Send Side: 13mm plasterboard directly fixed Receive Side: 13mm plasterboard screw fixed to resilient mounted furring channels, with insulation Discontinuous Construction: No Wall Thickness: 177mm   Rw 53 (-4;-10) Rw = 53 Rw + Ctr = 43 ATF Report 951
	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
	10mm mortar gap between leaves Send Side: 10mm plasterboard directly fixed Receive Side: 10mm plasterboard directly fixed Discontinuous Construction: No Wall Thickness: 250mm Rw 54 (-2;-4) Rw = 54 Rw + Ctr = 50 ATF Report 1612
	10mm mortar gap between leaves Send Side: No finish Receive Side: No finish Discontinuous Construction: No Wall Thickness: 230mm   Rw 59 (-1;-5) Rw = 59 Rw + Ctr = 54 ATF Report 1610
	10mm mortar gap between leaves Send Side: 13mm render coating Receive Side: 13mm render coating Discontinuous Construction: No Wall Thickness: 256mm Rw 61 (-1;-5) Rw = 61 Rw + Ctr = 56 ATF Report 1615
	50mm cavity Send Side: No finish Receive Side: No finish Discontinuous Construction: Yes Wall Thickness: 270mm   Rw 52 (-1;-5) Rw = 52 Rw + Ctr = 47 ATF Report 1074
	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. 

Dry Press Sound Solutions*
	Send Side: 12mm render Receive Side: 12mm render Discontinuous Construction: No Wall Thickness: 134mm   Rw 52 (-1;-5) Rw = 52 Rw + Ctr = 47 ATF Report 1393
	Send Side: 13mm plasterboard directly fixed Receive Side: 13mm plasterboard screw fixed to resilient mounted furring channels, with insulation Discontinuous Construction: No Wall Thickness: 177mm   Rw 56 (-3;-9) Rw = 56 Rw + Ctr = 47 ATF Report 1391
	Send Side: 13mm plasterboard directly fixed Receive Side: 13mm plasterboard screw fixed to 70mm x 30mm timber studs at 600mm centres, 20mm from wall, with insulation Discontinuous Construction: Yes Wall Thickness: 226mm   Rw + Ctr ≥ 50 BCA Deemed to Comply
	Send Side: 13mm plasterboard directly fixed Receive Side: 13mm plasterboard screw fixed to 64mm steel stud at 600mm centres, 20mm from wall, with insulation Discontinuous Construction: Yes Wall Thickness: 220mm   Rw + Ctr ≥ 50 BCA Deemed to Comply
	50mm cavity Send Side: No finish Receive Side: No finish Discontinuous Construction:  Yes Wall Thickness: 270mm Rw 53 (-1;-3) Rw = 53 Rw + Ctr = 50 ATF Report 1174
	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
	40mm Cavity Send Side: 10mm plasterboard directly fixed Receive Side: 10mm plasterboard directly fixed Discontinuous Construction: Yes Wall Thickness: 280 mm Rw 54 (-1;-4) Rw = 54 Rw + Ctr = 50 ATF Report 1463A
	50mm cavity Send Side: 13mm render Receive Side: 13mm render Discontinuous Construction: Yes Wall Thickness: 296mm   Rw 55 (-1;-4) Rw = 55 Rw + Ctr = 51 ATF Report 1175

*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
	10mm mortar gap between leaves Send Side: No finish Receive Side: No finish Discontinuous Construction: No Wall Thickness: 190mm   Rw 50 (-1;-5) Rw = 50 Rw + Ctr = 45 ATF Report 1607
	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   Rw 53 (-1;-5) Rw = 53 Rw + Ctr = 48 ATF Report 1608
	10mm mortar gap between leaves Send Side: 12mm render coating Receive Side: 12mm render coating Discontinuous Construction: No Wall Thickness: 214mm   Rw 56 (-1;-5) Rw = 56 Rw + Ctr = 51 ATF Report 1609
	40mm cavity Send Side: No finish Receive Side: No finish Discontinuous Construction: Yes Wall Thickness: 220mm   Rw 52 (-7;-10) Rw = 52 Rw + Ctr = 42 ATF Report 842
	50mm cavity Send Side: 13mm plasterboard screw fixed to resilient mounted furring channels Receive Side: 13mm plasterboard directly fixed Discontinuous Construction: Yes Wall Thickness: 297mm   Rw 52 (-2;-7) Rw = 52 Rw + Ctr = 45 ATF Report 1073

*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) Sound Solutions*
	Send Side: No finish Receive Side: No finish Discontinuous Construction: No Wall Thickness: 150mm   Rw 50 (-1;-5) Rw = 50 Rw + Ctr = 45 ATF Report 1594
	Send Side: 12mm render Receive Side: 12mm render Discontinuous Construction: No Wall Thickness: 174mm   Rw 55 (-1;-5) Rw = 55 Rw + Ctr = 50 ATF Report 1596
	Send Side: 13mm plasterboard directly fixed Receive Side: 13mm plasterboard screw fixed to resilient mounted furring channels, with insulation Discontinuous Construction: No Wall Thickness: 217mm   Rw 56 (-2;-9) Rw = 56 Rw + Ctr = 47 ATF Report 1117
	Send Side: 13mm sound-resistant plasterboard directly fixed Receive Side: 13mm sound-resistant plasterboard screw fixed to resilient mounted furring channels, with insulation Discontinuous Construction: No Wall Thickness: 217mm   Rw 60 (-2;-8) Rw = 60 Rw + Ctr = 52 ATF Report 1595
	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.