QBCC have been so concerned about the failures of poor building and waterproofing practices around the non-conformity of NCC and AS4654.2 to issue a technical feature on the subject. In Victoria, particularly in Melbourne we see exactly the same issues due to the lack of knowledge of AS4654.2. Please read the attached pdf QBCC Technical Feature – Waterproofing requirements doorways to balconies – 130217, and explore the Balconies section for more technical details.