The landmark report on weathertightness
A 2002 report remains the blueprint for change across the industry. In February that year, a Weathertightness Overview Group was appointed to inquire into the weathertightness of buildings in New Zealand. Its report - commonly referred to as the Hunn Report into Weathertightness - identified a number of factors that have contributed to leaky buildings. It included 25 recommendations that aimed to address and remedy the systemic building industry failures that had led to the weathertightness crisis.
The report led to the formation of the Weathertight Homes Resolution Service and changes to the Building Act. It is available here as four individual files.
Report on the Building Industry Summit on Weathertightness November 2002
One Hunn Report recommendation was for a meeting of industry leaders on what actions on weathertightness were needed. That meeting was held on 11 October 2002.
Report on the Building Industry Summit on Weathertightness November 2002 [PDF 47 KB, 11 pages]
Submission to the Inquiry into the Weathertightness of Buildings in New Zealand
The Minister of Internal Affairs' submission to the Parliamentary Inquiry into weathertightness.
Proposed Changes to B2/AS1 - Report to Building Industry Authority, November 2003
The report to the BIA on the proposed changes to B2/AS1 (Durability) is available below. The Report contains 10 reference documents, available here as individual PDF files:
- Appendix A: NZS 3602 Comparative Table 1 [PDF 90 KB, 3 pages]
- Appendix B: Definitions [PDF 28 KB, 2 pages]
- Appendix C: B2 Durability Working Group - Members [PDF 24 KB, 2 pages]
- Appendix D: B2 Durability Working Group - Final Minutes [PDF 100 KB, 11 pages]
- Appendix E: B2 Durability Regulatory Impact Statement [PDF 108 KB, 15 pages]
- Attachment 1: BIA Report on B2/AS1 Comments Received [PDF 508 KB, 47 pages]
- Attachment 2: Risk Matrix Approach considering Weathertightness and Durability [PDF 476 KB, 20 pages]
- Attachment 3: Report on E2/AS1 Risk Matrix and WHRS Data [PDF 672 KB, 30 pages]
- Attachment 4: BIA / NZIER Update on Cost Benefit Analysis [PDF 328 KB, 44 pages]
- Attachment 5: Proposed B2 Durability for Publication [PDF 208 KB, 7 pages]
The Department commissioned PricewaterhouseCoopers to undertake an independent report into the size and cost of the weathertightness issue.
The report, which was released in December 2009, showed there is a wide range of the possible number of homes affected, from a low of 22,000 to a high of 89,000. The wide range reflects the fact there is a high level of uncertainty about the number of homes affected that prevents an exact, and accurate, estimate to be made. Nevertheless, the report estimated it is most likely approximately 42,000 homes (called the ‘consensus forecast’) built between 1992 and 2005 have been affected. Read more »