The leaky building era was caused by a combination of untreated timber framing, monolithic cladding, poor detailing and a lack of drainage cavities. Not every home from that period leaks — but every home from that period needs proof.
The risk signals
- Built or altered roughly 1994–2004.
- Monolithic cladding — plaster, stucco or fibre-cement sheet with no visible cavity.
- Flat or very low-pitch roofs, and minimal or no eaves.
- Internal gutters, parapets, enclosed balconies above living space.
- Complex junctions, multiple levels, decks penetrating the cladding.
- Untreated kiln-dried framing (common in that window).
Evidence to ask for
- A moisture-testing report — non-invasive at minimum, invasive if there is any concern.
- The LIM, checked for weathertightness claims, remediation consents and any notices.
- Council records of a re-clad, including the code compliance certificate (CCC) for that work.
- Producer statements and any warranty or guarantee on remediation work.
If the home has been remediated
A properly re-clad home with a full CCC can be a genuinely good buy — the problem has been fixed and priced in. What matters is whether the remediation was consented, completed and signed off, and whether it was a full re-clad or a targeted repair.
Ask your lender early. Some banks are cautious about remediated homes and may want the report and CCC before approving.
Insurance is the tell
Before you go unconditional, get an insurance quote in writing. If insurers hesitate or exclude weathertightness, that tells you what the professionals think of the risk.
When to walk away
- Elevated moisture readings with no explanation and no vendor willingness to investigate.
- Unconsented alterations to cladding or decks.
- Repairs done without consent or without a CCC.
- An insurer that will not cover it, or a lender that will not lend on it.
The short version
- 1994–2004 plus monolithic cladding equals mandatory moisture testing.
- A consented, signed-off re-clad can be a good buy; an unconsented repair is not.
- Confirm insurance and lender appetite before going unconditional.
- Never waive a builder's report on a high-risk-era home.
General information for New Zealand first home buyers, not financial or legal advice. Rules and lender criteria change — check anything important with your solicitor, your lender or a mortgage adviser. Sources: Ministry of Business, Innovation and Employment (MBIE) — weathertightness guidance; Building Act 2004 — code compliance certificates.