The COLORSTEEL® Maxx™ paint system consists of an AZ200 ZINCALUME® steel substrate to which a super polyester prepainted finish system is applied. Designed to provide protection against corrosion in areas where severe to very severe environmental conditions are experienced.


COLORSTEEL® Maxx™ prepainted steel product is suitable for a wide range of rollformed roof and wall claddings, rainwater accessories and general building products. The COLORSTEEL® Maxx™ paint system will exceed the service life of most traditional post painted systems.

When rollformed, installed and maintained in accordance with New Zealand Steel’s recommendations, COLORSTEEL® Maxx™ prepainted steel is warranted by New Zealand Steel to meet the performance requirements of NZBC B2.3(c) for a 15 year durability when used for the manufacture of roof and wall claddings. COLORSTEEL® Maxx™ products are expected to fade uniformly over the surface, the extent being no more than 8 Hunterlab units on the Delta E scale, and have a chalk rating of 4 (AS 1580 481.1.11, 1998) after 10 years exposure.

The COLORSTEEL® Maxx™ prepainted steel substrate is steel strip, commonly 0.40 mm or 0.55 mm thick and coated with a 45% zinc, 55% aluminium alloy to a nominal coating mass of 200g/m2 manufactured in accordance to AS1397:2001. A range of thicknesses, widths and strengths are available. Following pretreatment, a corrosion inhibitive primer, and top coat is applied to the outer surface and a corrosion inhibitive primer and a backer to the reverse side. These coatings are oven cured to provide colour and corrosion performance.

COLORSTEEL® Maxx™ prepainted steel products are available in a range of COLORSTEEL® Maxx™ colours. The backer coat is Bass Grey.

Not all COLORSTEEL® prepainted steel roofing is corrugated. It is available in a range of profiles, from a simple decking profile to the more advanced secret fix systems. They are designed to make full use of the steel properties from which they are engineered.

When designing your home, consider which profile is appropriate – each profile has a minimum pitch below which it should not be installed. Discuss your requirements with the designer or contact your local rollformer for further information.

Rollforming companies operate throughout New Zealand, each offering their own range of profiles. Certain profiles are only suitable for cladding, while others can be used for both cladding and roofing.

Examples of profiles are shown below:

Maxx Profiles

COLORSTEEL® Maxx™ prepainted steel product is identified by a brand applied to the reverse surface, indicating product type and date of manufacture.

COLORSTEEL® Maxx™ prepainted steel is available from most roofing distributors in a range of colours. Where a colour is not available, delivery is normally within two to four weeks, depending on the location of the distributor.

Serviceable Life
COLORSTEEL® Maxx™ coating can be painted to extend its serviceable life. Contact New Zealand Steel for recommendations on overpainting weathered COLORSTEEL® products.

Drinking Water
Rainwater collected from roofs clad with products made from GALVSTEEL™, ZINCALUME® steel and COLORSTEEL® prepainted steel, will comply with the provisions of NZBC G12.3.1, provided the water is not contaminated from other sources.

The first 25 mm of rainfall from a newly installed roof must be discarded before drinking water collection starts. Where a paint or paint system is applied to the roof, its suitability for the collection of drinking water must be established.