@drshelley said:
At this stage I think our response will be that even 11mm regupol is only a ‘distant second’ to carpet. They will still take a risk that this will not fix the problem. To quote our neighbour she states that ‘she is confident this premium underlay will considerably improve the noise transfer into our unit and meet the by-law”.
Yes, my response would be that you can’t tell them how to deal with the problem but to caution them that you will not be satisfied with a solution that doesn’t properly address the noise transfer issue. A sensible if slightly more expensive solution would be to put 11mm Regupol on top of the existing insulation which is obviously more likely to do the trick.
Even so, the CTTT order is about stopping the noise, not laying down insulation and they should consider whether it is worth risking having to go back and do it all over again, After all, it was so-called “experts” who told them the current insulation would be fine. Attempting a solution is not the same as solving a problem. If it doesn’t worrk, all it means is you didn’t try hard enough and that’s exactly how NCAT will see it if the problem continues.