Irrespective of theory and material components, the Glazed Operable range is able to attain notable sound attenuation levels to the value of 44dB RW.


Sound reduction dB ratings are often quoted from laboratory test results which are misleading in respect of final performance values. They are merely useful for initial specification purposes. Independent on-site tests as carried out by Croxton are recommended as in-situ results will differ from laboratory test certification and are therefore the only true guide to achievable sound attenuation.