J Acoustic Report · 132007.2398

                                                                                        ACOUSTICS & AIR QUALITY


Component
                 Minimum
of Buildings
               Acoustic Rating                 Acceptable Forms of Construction
  External
                    (Rw)
 Envelope
                                 studs; and
                                 (iii) One layer of plasterboard at least 10mm thick fixed to
                                 outside face of studs
                                 OR
                                 Single leaf of brick masonry at least 110mm thick with at
                                 least 13mm thick render on each face
                                 OR
                                 Concrete brickwork at least 110mm thick
                                 OR
                                 In-situ concrete at least 100mm thick
                                 OR
                                 Precast concrete at least 100mm thick and without joints.
                                 Concrete or terracotta tile or metal sheet roof with sarking,
                                 plasterboard ceiling at least 10mm thick fixed to ceiling cavity,
   Roof              38
                                 mineral insulation or glass wool insulation at least 50mm
                                 thick with a density of at least 11 kg/m3.
                                 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
                                 joists and laid on plasterboard at least 10mm thick fixed to
  Floors             45
                                 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 1
                      27
                 (where total
               area of glazing   Minimum 4mm thick glass with full perimeter acoustically
               for a habitable   rated seals
               room is greater
  Glazing        than 1.8m2)
                      24
                 (where total    Minimum 4mm thick glass with standard weather seals
               area of glazing
               for a habitable


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