J Acoustic Report · 132007.2398

                                                                                         ACOUSTICS & AIR QUALITY

Appendix E MP4.4 Construction Requirements

Table E.1 Acceptable Forms of Construction

Component
                 Minimum
of Buildings
               Acoustic Rating                   Acceptable Forms of Construction
  External
                    (Rw)
 Envelope
                                        Noise Category 3
                       38         Minimum 14.38mm thick laminated glass, with full perimeter
                  (where total    acoustically rated seals;
                area of glazing   OR
                for a habitable   Double glazing consisting of one pane of minimum 5mm thick
               room is greater    glass and one pane of minimum 6mm thick glass with at least
                 than 1.8m2)      44mm air gap, and full perimeter acoustically rated seals
  Glazing              35
                  (where total
                area of glazing
                                  Minimum 10.38mm 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:
                                  (i) cavity not less than 50mm between leaves; and
                                  (ii) 50mm thick mineral insulation or 50mm thick glass wool
                                  insulation with a density of 11kg/m3 or 50mm thick polyester
                                  insulation with a density of 20kg/m3 in the cavity.

                                  OR
                                  Two leaves of clay brick masonry at least 110mm thick with:
                                  (i) cavity not less than 50mm between leaves; and
                                  (ii) at least 13mm thick cement render on each face

                                  OR
  External           47           Single leaf of clay brick masonry at least 110mm thick with:
   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
                                  studs; and
                                  (iii) One layer of plasterboard at least 13mm thick fixed to
                                  outside face of studs.

                                  OR
                                  Single leaf of minimum 150mm thick masonry of hollow,
                                  dense concrete blocks, with mortar joints laid to prevent
                                  moisture bridging.
                     41           Concrete or terracotta tile or metal sheet roof with sarking,
   Roof                           plasterboard ceiling at least 10mm thick fixed to ceiling joists,
                                  glass wool insulation at least 50mm thick with a density of at


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