Appendix F- Acousitc Report · MCU21/0117.01

Cooroy Villas Pty Ltd
Environmental Traffic and Rail Noise Level Impact Assessment for Proposed Residential Unit Development,
54 Elm Street and 5 Pearl Street, Cooroy                                                                    Page 21 of 36

    •    Category 2:          Glazing:        Rw 32 for glazing with up to and equal to 1.8m2;
                                              Rw 35 for glazing greater than 1.8m2;
                              External walls: Rw 41;
                              Roof:           Rw 38;
                              Floors:         Rw 45;
                              Entry Doors:    Rw 33.

With respect to the above the following examples of achieving the nominated minimum Rw values
should be noted (extracted from MP4.4):

    •    Noise Category 0:             no additional acoustic treatment required;

    •    Noise Category 1:
            o Glazing Rw 27:
                   ▪ minimum 4mm thick glass with full perimeter acoustically rated seals;
            o Glazing Rw 24:
                   ▪ minimum 4mm thick glass with standard weather seals;
            o external walls Rw 35:
                   ▪ single leaf of clay brick masonry at least 110mm thick with:
                   vi.        a row of at least 70mm x 35mm timber studs or 64mm steel studs at
                                        600mm centres, spaced at least 20mm from the masonry wall;
                              and
                       (ii)     One layer of plasterboard at least 10mm thick fixed to outside face of
                                studs
                       OR
                   ▪ minimum 6mm thick fibre cement sheeting or weatherboards or plank cladding
                       externally, minimum 90mm deep timber stud or 92mm metal stud, standard
                       plasterboard at least 13mm thick internally.
            o Roof Rw 35:
                   ▪ Concrete or terracotta tile or metal sheet roof with sarking, plasterboard ceiling
                       at least 10mm thick fixed to ceiling cavity.
            o Entry doors Rw 28:
                   ▪ fixed so as to overlap the frame or rebate of the frame, constructed of –

                       vii.           Wood, particleboard or blockboard not less than 33mm thick; or

                              (ii)     Compressed fibre reinforced sheeting not less than 9mm thick; or

                              (iii)    Other suitable material with a mass per unit area not less than
                                       24.4kg/m2; or

                              (iv)     Solid core timber door not less than 35mm thick fitted with full
                                       perimeter acoustically rated seals.

    •    Noise Category 2:
            o Glazing Rw 35:
                   ▪ minimum 10.38mm thick laminated glass, with full perimeter acoustically rated
                       seals
            o Glazing Rw 32:
                   ▪ minimum 6.38mm thick laminated glass with full perimeter acoustically rated
                       seals.
            o External walls Rw 41:
                   ▪ two leaves of clay brick masonry at least 110mm thick with cavity not less than
                       50mm between leaves
                       OR
                       Single leaf of clay brick masonry at last 110mm thick with:




David Moore & Associates Pty Ltd                                          Our reference: R23089.docx/D3819/Rev.0/17.01.24