Roofing Kohimarama

For Kohimarama properties within 200m of the Waitemata Harbour, OneRoofing applies the highest available NZ coastal roofing specification: BlueScope Colorsteel Enamel with PVDF coating (the top tier of the Colorsteel range, providing 3x the corrosion resistance of standard polyester-coated steel); Class A stainless steel fixing screws throughout (no galvanised components of any kind); copper or marine-grade aluminium flashings at all penetrations, valleys, and junctions; Sika 11FC or equivalent marine-grade silicone sealant at all joints; and marine-rated membrane flashings at roof-to-wall junctions. This specification aligns with NZS 3604 Severe Coastal zone requirements and BlueScope's most demanding marine application category, providing the maximum available service life in Kohimarama's salt-air environment.

Yes. OneRoofing works closely with architects, designers, and project managers on bespoke roofing specifications for Kohimarama new builds and major renovations. We have experience installing standing-seam zinc (Rheinzink, VM Zinc), copper, and architectural titanium-zinc profiles for high-end Kohimarama residential projects. We also install architectural standing-seam Colorsteel and pre-weathered zinc profiles for contemporary new builds. We participate in the design process from concept stage, advising on thermal movement allowances, substrate requirements, and drainage design to ensure the specified aesthetic is achievable within the building's structural parameters.

Yes, if the underlying iron is structurally viable. OneRoofing assesses Kohimarama heritage iron roofs by gauging sheet thickness (using calibrated electronic measurement), checking for corrosion depth at valleys and ridges, and inspecting all fastener penetrations. If the iron gauge is above 0.35mm with no rust-through holes, restoration using rust-inhibiting primer, butyl patch repair at any thin spots, and a 2-coat UV-stable iron oxide paint system can extend serviceable life by 8–15 years. If the iron has corroded through in multiple areas or gauges below 0.30mm, replacement with marine-grade heritage-profile Colorsteel (Custom Orb, matching the original appearance) is the right long-term solution for the Kohimarama heritage streetscape.

Premium coastal re-roofing in Kohimarama, using marine-grade Colorsteel Enamel PVDF, stainless fixings, copper or aluminium flashings, and full perimeter scaffold, typically ranges from $13,000–$40,000+ depending on roof area, pitch, material selection, and access complexity. For architect-specified standing-seam zinc or copper roofing on prestige Kohimarama properties, expect $25,000–$80,000+ depending on scope. All OneRoofing Kohimarama projects are priced with a detailed written quote itemising every material and labour cost with no hidden charges. Our 5-year workmanship warranty and applicable manufacturer warranties apply to all work.