Sound Transmission

RW values for various forms of Rapidwall construction:

Main ElementAdditional LiningAttachment MethodTotal Thickness (mm)RW
Single leaf Rapidwall, unfilled - - 123 28
Single leaf Rapidwall filled with 60kg/m3 cellulose fibre insulation - - 123 31
Single leaf Rapidwall filled with 90kg/m3 cellulose fibre insulation - - 123 33
Single leaf concrete filled Rapidwall - - 123 49
Single leaf Rapidwall filled with 90kg/m3 cellulose fibre insulation 13mm Gyprock Direct-fixed with screws and thin glue daubs 136 36
Single leaf concrete filled Rapidwall 13mm Gyprock and Tontine TSB3 polyester insulation Standard 28mm Rondo 129 furring channels 164 45
Single leaf concrete filled Rapidwall 13mm Gyprock and Tontine TSB3 polyester insulation Heavy gauge (1.2mm) Rondo 38mm top hat sections 174 54
Single leaf concrete filled Rapidwall 13mm Gyprock and Tontine TSB3 polyester insulation Standard 28mm Rondo 129 furring channels and CSR Gyprock resilient mounts 177 55
Single leaf concrete filled Rapidwall 13mm Gyprock and Tontine TSB3 polyester insulation Separate row of 51mm steel studs spaced 10mm from Rapidwall 197 55