This section of www.weathertight.org.nz discusses the information a designer needs before designing a remediation project that addresses the building's weathertightness issues.
It is important to obtain all the relevant information available on the building to be remediated. This forms the background of what the remedial design needs to address.
Further information should be sourced from building owners, original drawings and other documentation, and a site inspection. The primary source of information for a remediation design is the building condition and remediation report prepared by a specialist weathertightness assessor or other suitably qualified consultant.
While all sources are important, the key component of any remediation design is the report on the building’s current condition, which should include likely causes of problems, the extent of the damage and the proposed repair method. The designer should ensure that the report was carried out by an appropriately trained and qualified person such as an NZIBS Building Surveyor.
Once information gathering is completed, the designer should evaluate the proposed repair to determine whether:
- all specific concerns with the building have been addressed (if not, further investigation may be warranted)
- the building condition and remediation report has covered the basic weathertightness and durability issues that need to be addressed to make the building Code compliant
- the damage is minor, localised or widespread
- further investigations are likely to be required during construction.
The designer should then assess the repair options and decide the most appropriate option to address the specific weathertightness issues of the building. This should include consideration of costs and a decision about whether the designer is competent to design the work.
This website does not provide guidance on legal remedies available to building owners, although claim processes may be taking place at the same time as design and construction work to remedy weathertightness problems.
Good record-keeping by all parties is required for professional indemnity purposes. If legal action or a Weathertight Homes Resolution Service claim is contemplated or proceeding, the designer needs to keep an accurate record of:
- the analysis of the recommended repair option and why that option was chosen
- actual costs associated with the weathertightness remediation work
- consultants’ costs incurred
- costs incurred by the owner such as rented accommodation
- the extent of the damage that was uncovered (when compared to the estimates of damage in the original survey of the building) – good evidence-gathering will include taking photographs as the building work proceeds, including photographic and testing records of damage
- a comparison between the constructed details and those that were covered by drawings, manufacturers' literature and codes and standards applicable at the time of construction
- whether the identified causes were consistent with the original assessment of the problems
- costs and extent of any betterment/improvements the owner has undertaken or authorised.
Updated: 9 September 2014