20211104OBA_R2_Information_Request_Response - Acoustic RF · MCU21/0146

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[OCR of page images]
6.2 ROOF / CEILING CONSTRUCTION

The recommended roof/ceiling constructions for pitched roof is shown in Figure 2 below. Penetrations in all
ceilings (such as for light fittings etc.) must be acoustically treated and sealed gap free with a flexible sealant. The
ceiling sheet minimum requirements are presented in Table 21

Steel sheet roof with Anticon 145

Trus:
\ below \,

 

 

 

 

 

 

 

 

 

V rN
Min 250mm
75mm thick Glass wool insulation Air gap
- Figure 12 - Roof/ceiling constructions \
Ceiling sheet
Table 21 - External Lightweight Roof Constructions
A ic Rati
Space coustic Rating Internal Lining Truss System External Lining
1x 10mm plasterboard Minimum of
(additional 10mm 250mm truss
Level 3 Pitched plasterboard required to with 75mm Sheet Metal Roof
Roof Rw 47 address Noosa Civic thick 11kg/m3 | with Anticon 145
mechanical plant noise as glasswool below
is with limited treatment insulation in
applied at source) cavity

 

 

 

 

 

 

 

6.3 EXTERNAL WALLS

External walls are of concrete/masonry of acoustic rating Rw50 and will not require acoustic upgrading. Alternative
construction details may be suitable but must be submitted to Acoustic Logic for review and approval.

6.4 ACOUSTIC SEALING OF WINDOW FRAMES

Where glazing is required to achieve a nominated acoustic performance the perimeter of the window frame shall
be acoustically sealed into the window opening so there is no leakage of noise between the window frame and
the building opening. The sealing method selected shall take into account and allow for any movement of the
window frame relative to the building opening and so that the acoustic performance is maintained.

IMobs\2021\20210208\20210208.3\20210923JJMA_R4_Development_Application_.docx 54