Iron Roof Painting Guide

Painting your iron roof is one of the most cost-effective ways to restore its appearance, improve protection against the elements, and extend its lifespan. With the right preparation, coating, and maintenance, a painted iron roof can perform reliably for decades, even in New Zealand’s challenging climate.

What is Iron Roof Painting?

Iron roof painting is the process of cleaning, repairing, priming, and coating corrugated or long-run metal roofs with specialised roofing paint. The aim is to protect the underlying steel from corrosion, enhance UV resistance, and refresh the overall look of the property.

Iron roofs are popular throughout New Zealand for their strength and lightweight construction — but without proper care, they can fade, chalk, and rust over time. Professional roof painting rejuvenates your roof’s performance and appearance while avoiding the higher costs of a full roof replacement.

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Why Choose Roof Painting Over Replacement?

In New Zealand, there are three main manufacturers of roofing steel that supply materials to roll formers and retailers before they are shaped into roofing profiles:

Cost-Effective

Painting and restoring is usually only a fraction of the cost of a full reroof.

Extended Lifespan

Proper preparation and coating can add 10–15 years of service life.

Improved Appearance

A fresh, modern colour can instantly lift your property’s street appeal.

Common Iron Roof Painting Services

Whether you’re installing a new roof, repairing an existing one, or upgrading, here are the most common services available:

Roof Cleaning & Preparation

Thorough washing removes dirt, moss, mould, and chalky residue. Any flaking or peeling paint is stripped back, and corrosion is treated with rust inhibitors.

Repairs & Maintenance

Loose fixings, damaged flashings, and small holes are repaired before painting. This ensures the coating adheres well and the roof remains watertight.

Priming & Coating

A suitable metal primer is applied to bare or treated steel, followed by two coats of specialised roof paint from Shieldcoat

Factors Affecting the Cost of Iron Roof Painting

The price depends on roof size, condition, and accessibility, as well as the quality of paint and preparation work required.

Estimated Price Range:

  • Small residential roofs: From $2,500–$5,000 Usually

  • Medium–large residential roofs: From $5,000–$10,000+

  • Commercial roofs: Price on application

Cost Influences:

  • Roof pitch and height (safety equipment may be required)

  • Rust treatment and repairs needed

  • Choice of paint system (premium coatings cost more but last longer)

  • Location and weather conditions during application

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