The new building standards require acoustic insulation in floors & partitions with mineral wool of density of 10kg/msq. I contacted Knauf Insulation and they refused to divulge the density of their insulation due to a 'policy decision'. Is there something they need to hide? Does anybody know where I can find an indication of the density of glassfibre quilt insulation which will meet this reqirement? I know that it can be deduced, but the local authority where I am normally require a document with the required information stated somewhere.
TIA
TIA