#52425
Austman
Flatchatter

    I agree that the OC should seek professional advice.

    And to note that wet walls in underground parking areas are actually quite common and are not necessarily a building fault.  Those areas are are typically NCC/BCA Class 7, even if the building above is Class 2.

    Class 7 areas have different waterproofing requirements and need not be 100% dry.  Walls can even be purposely designed to get wet, in which case, while they don’t look pretty, interior waterproofing of them can be a mistake.  AFAIK, those types of walls are not the structural elements of the building.