COLORSTEEL® Maxx® prepainted steel has been designed for superior performance and toughness.

Specifically developed to withstand higher atmospheric salt concentrations, it’s perfectly suited to more extreme building environments, including near New Zealand’s rugged coast.

The AZ200 ZINCALUME® steel substrate has a 200g/m² zinc/aluminium alloy coating, providing greater corrosion protection over your entire roof, including galvanic protection on cut edges. A corrosion resistant primer and baked-on paint finish add further protection, ensuring your roof looks great and will endure the harsh New Zealand elements for many years to come.

The COLORSTEEL® Maxx® prepainted steel palette has 18 standard colours plus 7 architectural colours. Each colour is inspired by the subtle hues and dramatic tones that give New Zealand its reputation as one of the world’s most breathtaking natural habitats.

Limitations of Use

COLORSTEEL® Maxx® prepainted steel products are designed for use in the very severe environment, greater than 50 m from the east coast or greater than 100 m from the west coast. Before using COLORSTEEL® Maxx® prepainted steel products near sources of industrial pollution or in geothermal areas, consult the Technical Market Manager, New Zealand Steel.

COLORSTEEL® Maxx® prepainted steel products should not be used in the following applications:

  • Embedded in concrete
  • In contact with permanently wet materials
  • Water tanks
  • In contact with soil, bark or similar
  • As concrete formwork
  • In intensive animal shelters

Copper or brass pipes must not be allowed to discharge onto COLORSTEEL® prepainted steel products or be allowed to come into contact with them.

The use of other materials in proximity to COLORSTEEL® prepainted steel products must be in accordance with the New Zealand Steel Specifiers and Builders Guide.

Mixing of brands of prepainted material on the same building is not recommended by New Zealand Steel Limited. Marking with lead pencils is not advised, and sealing washers should be low carbon non-conducting. Refer to the New Zealand Steel Installers Guide under the ‘Marking, Cutting and Drilling’ section.


Areas of COLORSTEEL® Maxx® prepainted steel not regularly washed with rain water, such as wall claddings, unwashed areas and areas of high risk, must be routinely washed to remove surface deposits to ensure satisfactory life is obtained from the product. Specific maintenance recommendations are given in the table below. Check guttering and downpipes regularly and remove any debris which may lead to ponding or flooding. Always wear soft soled shoes when walking on COLORSTEEL® prepainted steel surfaces to avoid causing damage.

Maintenance Recommendations for COLORSTEEL® Maxx® Products Used for Roofing and Wall Cladding

Moderate ISO Category 3 Severe ISO Category 4 Very Severe ISO Category 5
Roof Rain washing Rain washing Rain washing
Wall cladding Rain washing plus manual washing every year Rain washing plus manual washing every 6 months Rain washing plus manual washing every 3 months
Unwashed and High Risk Areas Manual washing every 6 months Manual washing every 3 months Manual washing every month


Installation details for COLORSTEEL® Maxx® prepainted steel product are contained in the New Zealand Steel Installers Guide.


  • Aluminium and factory painted fixings are acceptable
  • Stainless steel, Monel or other copper alloy fixings must not be used
  • Lead-head nails must not be used
  • Fixings that meet AS3566 class 3 and 4 are acceptable

For more information, please see Information Bulletin 10: Fasteners for Roofing and Walling Products.


  • Use only neutral-cure silicone rubber sealants
  • Do not use abrasive cutting wheels
  • Do not weld, braze or solder

Touch-up Paints: These paints should not be used, as air drying paints have different weathering characteristics to the COLORSTEEL® prepainted steel coating. For more information, see Information Bulletin 5: Touch-Up Paints and COLORSTEEL® Building Products.


All debris (particularly from roofing installation) must be removed from COLORSTEEL® Maxx® prepainted steel product surfaces at the end of each day’s work. Take care not to damage the coating when removing sharp fixing debris. For more information, see Information Bulletin 7: Swarf Staining of Steel Roofing and Cladding.


COLORSTEEL® Maxx® prepainted steel roof cladding must be installed at a minimum of 3° or over the minimum pitch given for the profile in NZBC E2/AS1, whichever is greater. Factors likely to affect the resistance of COLORSTEEL® Maxx® prepainted steel to external moisture include the quality of the installation, severity of the climate, roof configuration, material profile and design and execution of junctions between similar materials and other elements.


COLORSTEEL® Maxx® prepainted steel prepainted steel comprises a combustible surface adhered to a noncombustible substrate. Used on roofs, it meets the requirements of NZBC C3/AS1 in all purpose groups. Refer to C3/AS1 Section 4.0 External Walls and Roofs which covers vertical and horizontal spread of fire.


The use of roofing and wall claddings manufactured from COLORSTEEL® Maxx® prepainted steel in accordance with New Zealand Steel’s instructions will meet the nonhazardous performance requirements of NZBC F2.3.1.


If COLORSTEEL® prepainted steel products are to be stored for any time prior to forming or installation, they must be stored in dry, well ventilated conditions. Storage which allows water (including condensation) to be trapped between the sheets may damage the coating beyond repair. COLORSTEEL® Maxx® prepainted steel products must be handled carefully during transport, fabrication and fixing to avoid damaging the surface.

Both COLORSTEEL® Maxx® and  COLORSTEEL® Endura® have residential warranties available. The product used and the location of the building determines the warranty period.

The New Zealand Building Code (BIA B2.3.1 Durability) has indicated that non-structural roofing shall have a minimum durability of 15 years (with maintenance).

Our residential roofing warranties meet this requirement. Cladding, fascia and rainwater products also meet the appropriate durability requirements.

The environment of the building location dictates the warranty term.

The New Zealand Steel Environmental Categories, Warranties and Maintenance brochure has warranty periods, product recommendations, maintenance requirements and product usage restrictions.

Residential roofing and rainwater products (gutter, fascia and downpipes) warranties are issued by our Distributors. Request one when you order your COLORSTEEL® prepainted steel roof or rainwater products.

The COLORSTEEL® prepainted steel colours shown on this site have been reproduced to represent actual product colours as accurately as possible. However, we recommend checking your chosen colour against an actual sample of the product before purchasing, as limitations of web palette colours affect colour tones – To order a steel sample call 021 401 514 or email

    • Colour Palette

    • Karaka
    • FlaxPod®
    • Sandstone Grey
    • Ironsand
    • Grey Friars
    • Ebony
    • Titania
    • Cloud
    • Desert Sand
    • Gull Grey
    • Mist Green
    • Lichen
    • Lignite
    • Pioneer Red
    • Permanent Green
    • Scoria
    • New Denim Blue
    • Thunder Grey
    • Slate
    • Windsor Grey