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Sudden damage and gradual deterioration are different questions
ICNZ explains that house policies are generally designed around sudden, unexpected events, while wear, corrosion, rot and other gradual deterioration are commonly excluded. Resultant interior damage can have different treatment depending on the policy and how the damage occurred. Sources: Insurance Council of New Zealand.
What to do after storm damage
- Keep people away from loose roofing, live electrical hazards and unsafe roof areas.
- Photograph visible damage from safe locations.
- Record the date/time and what weather or event occurred.
- Contact the insurer promptly and ask what temporary protection is authorised.
- Do not dispose of damaged materials before checking with the insurer where they may need assessment.
- Keep emergency repair invoices and contractor reports.
ICNZ says insurers typically need the circumstances, detailed damage information and timing, and may send an assessor. It recommends photographs and checking before disposing of damaged items. Sources: Insurance Council of New Zealand.
Why roof maintenance can affect a claim
ICNZ says reasonable care and maintenance are important because insurance is not intended to replace normal upkeep. A roof already perforated by long-term corrosion is a different risk from sound roofing suddenly damaged by wind. Sources: Insurance Council of New Zealand.
Keeping maintenance records, photos and invoices can help establish what condition the roof was in before an event, but they do not override the terms, limits or exclusions of the policy. Sources: Insurance Council of New Zealand; NZ Metal Roofing Manufacturers.
Can you repair the roof before the insurer assesses it?
Safety and preventing further loss come first, but coordinate non-emergency permanent work with the insurer. Ask what temporary measures, contractor reports, photographs and retained materials they need before substantial repairs remove the evidence. Sources: Insurance Council of New Zealand.
If the roof needs full replacement
If an event exposes that the roof was already near end of life, the insurer and owner may separate insured damage from maintenance or betterment. Get the scope in writing and understand who is paying for what before committing to a full reroof. Sources: Insurance Council of New Zealand.
Related questions
Does house insurance cover a rusty leaking roof?
Policies commonly exclude gradual deterioration such as wear, rust or corrosion, although resulting damage can be treated differently depending on the policy and circumstances. Check your insurer’s wording and assessment. Sources: Insurance Council of New Zealand.
Should I throw away storm-damaged roofing?
Not before checking with the insurer if it may be relevant to the claim. Photograph the damage and ask what the insurer or assessor needs to inspect or retain. Sources: Insurance Council of New Zealand.
Does insurance pay for a complete reroof after a storm?
It depends on the insured event, pre-existing roof condition, policy wording and whether full replacement is necessary to remedy insured damage. RoofHub cannot determine coverage from the fact that a storm occurred. Sources: Insurance Council of New Zealand; Insurance Council of New Zealand.
Sources and review notes
Prepared by RoofHub editorial. Reviewed . A source check confirms what a page states, not an independent inspection or invoice audit. Published project accounts are attributed to their publishers.
- primaryInsurance Council of New Zealand: How to Make an Insurance Claim - ICNZ claim guidance recommending prompt contact with the insurer, documenting damage and checking before disposing of damaged items. It also distinguishes sudden events from wear, tear and maintenance issues. Page checked 2026-10-21. Publication date not stated. · industry-technical
- primaryInsurance Council of New Zealand: Gradual deterioration and resultant damage - ICNZ consumer guide dated October 2019 explaining the common distinction between sudden accidental loss and gradual deterioration, and why reasonable care and maintenance can affect insurance outcomes. Individual policy wording controls. Page checked 2026-10-21. Publication date not stated. · industry-technical
- primaryNZ Metal Roofing Manufacturers: Code of Practice v26.09: Preventative maintenance - Current MRM guidance on preventative maintenance in vulnerable areas, including severe marine micro-environments and unwashed areas. Used alongside the selected product manufacturer warranty and care requirements. Page checked 2026-10-21. Publication date not stated. · industry-technical
Original calculations are labelled as examples. Historical prices stay dated, missing fields stay unknown, and conflicting specifications are flagged. Sources are not endorsements or paid rankings. Read our methodology or report a correction.
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