A lifespan isn't a promise. The same product lasts longer inland and looked after than it does on the beachfront 1.
How long does each roof material last in NZ?
What the published guidance says:
| Material | Life / maintenance | Source |
|---|---|---|
| Clay or concrete tile | 50–60 years before replacement | [[branz_tile]] |
| Tiles (maintenance) | Repoint every 20–25 years; paint every 25–30 years | [[sr248]] |
| Pre-painted steel or metal tile | Repaint every 7–10 years after the initial period | [[sr248]] |
| Any roofing (Code minimum) | 15 years with maintenance (NZBC B2) | [[nzs_b2]] |
| Original 1970s metal roofs | May be nearing end of life, especially coastal | [[branz_70s]] |
Does living near the sea shorten roof life?
Yes, for metal roofs. Manufacturers grade sites from Mild to Extremely Severe by how much salt they get, and the harsher ones need higher-spec products and more washing 1.
Frequently asked questions
Sources
- COLORSTEEL® — Environmental categories & warranty guide (PDF) (accessed 26 Oct 2026)
- BRANZ — Renovate: 1970s houses (book, June 2011, PDF) (accessed 26 Oct 2026)
- New Zealand Steel — Information Bulletin 12: Maintenance recommendations (PDF) (accessed 26 Oct 2026)
- BRANZ (via Building CodeHub) — Good Repair Guide: Clay and concrete roof tiles (accessed 26 Oct 2026)
- BRANZ — Study report SR248: Life cycle costs and analysis of roof cladding systems (PDF) (accessed 26 Oct 2026)
Prices are published planning ranges, not quotes. See our editorial policy.