If you own a home that has suffered weathertightness failures — leaks, rot, or moisture damage — the Weathertight Homes Resolution Service (WHRS) may be a pathway to resolving disputes with builders, carpenters, or other parties involved in your home's construction or cladding work. While the WHRS no longer accepts new claims (it closed to new applications in 2016), its legacy continues to shape how carpentry disputes are understood and resolved in New Zealand, and the lessons learned remain highly relevant for homeowners dealing with leaky building issues today.
What Was the Weathertight Homes Resolution Service?
The WHRS was a government-funded service established under the Weathertight Homes Resolution Services Act 2006 (confirm the exact Act title and year with MBIE or a legal adviser) to help owners of leaky homes seek compensation and resolution without going through the courts. It offered assessments, mediation, and adjudication for homes built or altered within the eligibility period set by the Act — confirm the exact date range with MBIE or a legal adviser that showed signs of weathertightness failure.
The service recognised that many leaky home problems stemmed from a combination of factors: poor design, substandard materials, and — critically — faulty carpentry and building work. Carpenters and builders were frequently named as respondents in WHRS claims, particularly where cladding, joinery installation, flashing, or framing had been done incorrectly.
How Carpentry Work Featured in WHRS Claims
Carpentry is central to a home's weathertight envelope. Common carpentry-related failures that appeared in WHRS cases included:
- Incorrect installation of monolithic cladding systems (such as EIFS/plaster systems) without adequate clearances or flashings
- Poor window and door joinery installation, leaving gaps for water ingress
- Inadequate or missing flashings at junctions, parapets, and penetrations
- Untreated or under-treated timber framing that rotted when moisture entered
- Decks and balconies built without proper waterproofing or drainage falls
Under the WHRS process, an independent assessor would inspect the home and identify which trades or parties contributed to the failure. Carpenters, building companies, and sometimes territorial authorities (councils) could all be found liable for a share of the repair costs.
The Leaky Homes Legacy and Today's Building Standards
The leaky homes crisis led to significant reforms in New Zealand's building industry. The NZ Building Code — particularly Clause E2 (External Moisture) — was strengthened, and MBIE Building Performance now provides detailed guidance on acceptable solutions for weathertight construction. BRANZ has published extensive research and good practice guides that carpenters and builders are expected to follow.
Key changes that came out of this era include:
- Mandatory Licensed Building Practitioners (LBP) for restricted building work, meaning certain carpentry tasks on homes must be carried out or supervised by an LBP-registered tradesperson
- Stricter requirements around cladding systems, cavity construction, and flashing details
- Greater accountability through Record of Work documentation that LBPs must provide
What If You Have a Weathertightness Problem Now?
Because the WHRS is closed to new claims, homeowners with current weathertightness disputes have other options:
Building Disputes Tribunal
The Building Disputes Tribunal — check with MBIE Building Performance for its current status and jurisdiction can still hear certain ongoing or related matters. Check with MBIE Building Performance for current eligibility.
Civil Court Action
Homeowners may pursue claims through the courts against builders, carpenters, or councils. Limitation periods apply, so seek legal advice promptly if you suspect a problem.
Your Local Council
If building consent conditions were not met, your territorial authority (council) may have obligations. Always confirm with your council what remedies are available.
Insurance and Warranties
Check whether your Master Build Guarantee or LBP's professional indemnity insurance covers the defect. Many reputable carpentry contractors carry insurance for exactly this reason.
Protecting Yourself When Hiring a Carpenter
The leaky homes era taught New Zealand homeowners some hard lessons. When hiring a carpenter for any work on your home's weathertight envelope — cladding, decks, windows, roofing, or framing — take these steps:
- Verify LBP registration at lbp.govt.nz before signing any contract
- Ask for a written contract that specifies materials, methods, and compliance with the NZ Building Code
- Ensure building consent is obtained where required — never assume work is exempt without checking with your council first (Schedule 1 of the Building Act lists exemptions, but these are narrower than many people think)
- Request a Record of Work on completion of any restricted building work
- Use products and systems that comply with E2/AS1 or have a current CodeMark certificate
When to Call a Professional
Any carpentry work that forms part of your home's weathertight envelope — external cladding, structural framing, window installation, or deck waterproofing — is likely to be restricted building work under the Building Act. This means it must be carried out or supervised by a Licensed Building Practitioner. Attempting this work yourself or using an unlicensed tradesperson could void your insurance, create consent issues, and leave you without legal recourse if things go wrong.
If you suspect weathertightness failure in your home, get a qualified building inspector or LBP to assess the situation before any repair work begins. You can find experienced, vetted carpenters and building professionals in your area on tradedirectory.co.nz.
