J Acoustic Report · 132007.2398

                                                                                          ACOUSTICS & AIR QUALITY


Component
                 Minimum
of Buildings
               Acoustic Rating                   Acceptable Forms of Construction
  External
                    (Rw)
 Envelope
                                  least 11kg/m3 or polyester insulation at least 50mm thick
                                  with a density of at least 20kg/m3 in the cavity.
                                  OR
                                  Concrete suspended slab at least 100mm thick.
                                  Concrete slab at least 100mm thick
                                  OR
                                  Tongued and grooved boards at least 19mm thick with:
                                  (i) timber joists not less than 175mm x 50mm; and
                                  (ii) mineral insulation or glass wool insulation at least 75mm
                                  thick with a density of at least 11kg/m3 positioned between
                     45           joists and laid on plasterboard at least 10mm thick fixed to
  Floors
                                  underside of joists; and
                                  (iii) mineral insulation or glass wool insulation at least 25mm
                                  thick with a density of at least 11kg/m3 laid over entire floor,
                                  including tops of joists before flooring is laid; and
                                  (iv) secured to battens at least 75mm x 50mm; and
                                  (v) the assembled flooring laid over the joists, but not fixed to
                                  them, with battens lying between the joists.
                                  Fixed so as to overlap the frame or rebate of the frame by not
                                  less than 10mm, fitted with full perimeter acoustically rated
                     33           seals and constructed of -
Entry doors
                                  (i) solid core, wood, particleboard or blockboard not less than
                                  45mm thick; and/or
                                  (ii) acoustically laminated glass not less than 10.38mm thick.
                                         Noise Category 2
                       35
                  (where total
                area of glazing   Minimum 10.38mm thick laminated glass, with full perimeter
                for a habitable   acoustically rated seals.
               room is greater
                 than 1.8m2)
  Glazing              32
                  (where total
                area of glazing
                                  Minimum 6.38mm thick laminated glass with full perimeter
                for a habitable
                                  acoustically rated seals.
                 room is less
               than or equal to
                    1.8m2)
                                  Two leaves of clay brick masonry at least 110mm thick with
                                  cavity not less than 50mm between leaves
                                  OR
                     41           Single leaf of clay brick masonry at last 110mm thick with:
  External
   walls                          (i) 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) mineral insulation or glass wool insulation at least 50mm
                                  thick with a density of at least 11 kg/m3 positioned between


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