Tile and decramastic roofs
If your home has a concrete tile or pressed-metal (decramastic) roof, a switch to long-run steel is a common choice. Some older decramastic coatings may contain asbestos, so testing comes first 2. Converting tile to profiled metal in the same position is an MBIE example of exempt work 3. See tile to steel.
Harbour and coast
Titahi Bay, Plimmerton and Pukerua Bay face open coast, while Paremata and Mana sit on the harbour and inlet. Both affect the exposure category and which coating is warranted 4.
Hill suburbs
Higher suburbs such as Whitby and Aotea can be exposed to strong winds, so the wind zone and fixing pattern should be on your quote 5.
Suburbs in Porirua
Linked suburbs have their own local guide. Not listed? Enquiries are welcome from anywhere in {p["area"]}.
Frequently asked
Is decramastic always asbestos?
No. Some older decramastic coatings contain it, so only a test can tell 2.
Sources
- Wikipedia — Whitby, New Zealand
- PropertyHelp — How much does asbestos removal cost in NZ? (2026 price guide, Sept 2026)
- MBIE Building Performance — Schedule 1, exemption 1: general repair, maintenance and replacement
- COLORSTEEL® — Environmental categories & warranty guide (PDF)
- NZ Metal Roofing Manufacturers — Code of Practice: fastening pattern tables (NZS 3604)
Figures are published planning ranges, checked 26 October 2026. They are not quotes.