Roof Painting Costs in NZ

Roof painting is a specialist job - different from wall painting in equipment, coatings, and safety requirements. These factors drive the price:

• Roof area - Measured in m², not floor area. A hip roof has more surface area than a gable roof on the same house. Typical NZ 3-bed roofs are 100–150 m², 4-beds are 150–220 m².
• Roof material - Colorsteel and long-run iron are the fastest to coat. Concrete tiles absorb more paint and need specialist membrane coatings. Decramastic tiles need careful prep to avoid dislodging chips.
• Condition and rust - Surface rust on iron roofs needs grinding, treating with rust converter, and spot-priming before topcoats. Extensive rust adds $500–$1,500 to the job. If the roof is rusted through, it needs replacing, not painting.
• Pitch and access - Low-pitch roofs are faster and safer. Steep pitches (above 25°) need harness setups and roof brackets, slowing painters and increasing safety costs.
• Mould and lichen - Common on shaded roofs in humid regions (Wellington, Dunedin, West Auckland). Needs high-pressure wash plus fungicide treatment before painting.
• Coating system - A basic 2-coat acrylic roof paint is the standard. High-build membrane systems (used on concrete tile) cost 30–40% more but last 12–15 years vs 7–10 for standard paint.

A proper roof painting job follows this sequence:

1. Inspection - Check for rust, loose fixings, cracked tiles, and structural issues. Some companies offer free inspections; others charge $100–$300 deducted from the job if you proceed.
2. High-pressure wash - Water-blast at 3,000+ PSI to remove dirt, moss, lichen, and loose paint. This alone takes half a day to a full day on a large roof.
3. Repairs and rust treatment - Replace loose or rusted screws, apply rust converter to affected areas, seal around penetrations (vents, aerials, skylights).
4. Primer coat - Galvanised iron primer on bare metal, or sealer on concrete tile. This is the coat that makes the topcoat stick.
5. Two topcoats - Airless spray application is standard for roofs. Resene Hi-Glo or Dulux Roof & Trim are common NZ choices.

The whole process takes 2–4 days for a standard home. Larger or more complex roofs take a week.

For how roof painting fits into a full house repaint budget, see our exterior painting cost guide.

Roof painting extends life by 10–15 years - but only if the underlying roof is sound. Here's how to decide:

• Paint - Surface rust, faded colour, minor cosmetic wear. The roof structure and material are solid. Painting costs $3,000–$8,000.
• Replace - Rust-through holes, severely corroded fixings, sagging or warped sections, persistent leaks. Re-roofing a 3-bed costs $15,000–$30,000+.
• Not sure? - Get a roofer's assessment, not just a painter's. A roof painter benefits from painting; a roofer will tell you if it's past the point of painting.

If your roof is in good shape, painting is one of the best-value maintenance investments for an NZ home. It protects against UV degradation, prevents rust progression, and adds 5–10% to street appeal.

• Colorsteel / Zincalume long-run - The most common NZ roof. Use acrylic roof paint (Resene Hi-Glo, Dulux Roof & Trim). Lasts 8–12 years between coats. Galvanised primer on any bare metal.
• Concrete tile - Common on 1960s–1990s homes. Needs a membrane coating system (not standard wall paint). Resene Lumbersider or Dulux AcraTex Roof Membrane. More expensive per m² but seals hairline cracks.
• Decramastic tile - Stone-chip coated steel. Tricky to paint - chips fall off during prep. Needs careful low-pressure wash and a specialist coating. Budget 20–30% above standard roof painting rates.
• Old corrugated iron - Pre-1980 galvanised iron. Often has multiple layers of old paint and rust. Needs the most prep - scraping, rust conversion, and a full primer system before topcoats.

Always confirm the coating system in your quote. A cheap quote using standard house paint on a roof will peel within 2–3 years.

Before using any published price range, confirm the scope, measurements, substrate condition, prep level, number of coats, paint system, access, exclusions, waste, GST, and target margin. You should also separate labour from materials so you can see whether the job is profitable.

Use these price ranges as a starting point, then build a structured quoting workflow: capture the enquiry, inspect the site, measure the work, build the quote, send it, follow up, schedule the crew, track job costs, and invoice. ATT is built to keep that full workflow together for New Zealand painting and decorating businesses.