Roof painting protects and refreshes a roof that is still structurally sound. The system differs by material: steel roofs need rust treatment and a keycoat before topcoats, concrete and terracotta tile roofs need a sealer to bind the porous surface instead. A roof coating extends the life of the existing roof, it does not replace a roof that has failed structurally.
Second to None paints and recoats Auckland roofs, with the preparation and coating system matched to the roofing material. A long-run iron roof and a concrete tile roof fail differently and need different treatment before either one is ready for a topcoat.
Roof wash to remove moss, lichen and surface build-up before any coating work.
Rust treatment and fastener checks on long-run iron and steel roofs.
Sealing and priming for concrete or terracotta tile roofs.
Topcoat application as a full system, not a single colour coat over an untreated surface.
The roof is washed to remove moss, lichen and loose debris, with time allowed for the wash to work before rinsing. This is also when rust spots, cracked tiles, damaged flashings and failed fasteners are found.
Steel roofs get rust treatment and a keycoat or primer. Concrete and terracotta tile roofs get a sealer that binds the porous surface, since tile does not need rust treatment but does need something to stop the topcoat soaking straight in.
A roof coating system is a base coat and a topcoat over the correct primer or sealer for the material, not a single coat sold as a full recoat. Access, pitch and safe working methods are planned before coating starts.
| Factor | Why it changes the price |
|---|---|
| Roofing material | Long-run steel needs rust treatment, fastener replacement and a keycoat. Concrete and terracotta tile need cracked-tile checks, ridge and barge repointing and a sealer. The two systems use different products and different labour. |
| Roof pitch and access | A steep pitch changes what fall protection and access equipment is needed. WorkSafe NZ treats a roof recoat running more than a day as long-duration work that needs guardrails or scaffold rather than fall restraint alone. |
| Condition of the existing surface | Heavy moss and lichen need a longer wash cycle and more drying time before coating. Surface rust or damaged tiles add treatment and repair steps that a clean roof would not need. |
| Roof size and number of planes | Valleys, multiple pitches and roof penetrations such as vents and flashings all add cutting-in time that a simple single-plane roof does not. |
| Number of coats needed | A roof coating system is a primer or sealer plus at least a base coat and a topcoat. A roof in poorer condition may need an extra coat to get consistent coverage. |
Long-run corrugated steel and Zincalume are widespread on Auckland homes, and the coating system for them is built around treating surface rust and priming bare or corroded steel before any colour coat goes on, not just refreshing the colour.
Concrete and terracotta tile roofs are porous, so instead of rust treatment they need a sealer or keycoat that binds the surface. Cracked or slipped tiles are usually found and repaired at this stage, before sealing.
A roof coating system extends the life of a sound roof. It is not a substitute for repairing structural damage: a roof with rot, corrosion through the metal or tiles that no longer sit correctly needs those areas repaired or replaced, not coated over.
Roof work depends on dry, settled weather for washing, drying between treatment steps and coating. Auckland's wetter winter months make a longer dry run of days harder to schedule than the warmer part of the year.
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A roof that is structurally sound but faded, chalky or lightly rusted or has worn tile glaze is usually a good candidate for a coating system. A roof with structural rot, corrosion through the material, or tiles that no longer sit and seal correctly needs repair or replacement of those areas first, since a coating does not restore structural integrity.
No. A coating system protects and extends the life of the existing roofing material. It does not replace the roof or make a structurally compromised roof sound again.
Moss, lichen and surface build-up stop a coating from bonding properly. The roof is washed and given time to work before any treatment or coating begins.
No. Steel and long-run iron roofs need rust treatment and a keycoat or primer suited to metal. Concrete and terracotta tile roofs need a sealer that binds the porous tile surface instead. The topcoat only goes on once that groundwork is right for the material.
Access, edge protection and working method are planned around the pitch and the length of the job before work starts, in line with WorkSafe NZ's guidance on working at height on roofs.
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