Approved ECNZ partners


  • East Tamaki, Auckland (Roofing)
  • Hamilton (Roofing)
  • Hastings (Roofing)
  • Hobsonville, Auckland (Roofing)
  • New Plymouth (Roofing)
  • Palmerston North (Roofing)
  • Tauranga (Roofing)
  • Wellington (Roofing)
  • Whangarei (Roofing)
  • Christchurch (Roofing & Structural)
  • Auckland (Structural)

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Steel & Tube

  • Christchurch (Roofing)
  • Hamilton (Roofing)
  • Highbrook, Auckland (Roofing)
  • Tauranga (Roofing)
  • Wellington (Roofing)
  • Whangarei (Roofing)

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Roofing Industries

  • Christchurch
  • Hamilton
  • Rosedale, Auckland
  • Taupo
  • Tauranga

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  • East Tamaki

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COLORSTEEL Sustainability credentials for commercial building

COLORSTEEL® Sustainability Credentials for Commercial Building

Read this to understand how COLORSTEEL® contributes to credits within the Green Star Design and As Built NZv1.0 rating tool.

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COLORSTEEL Sustainability credentials for residential

COLORSTEEL® Sustainability Credentials for Residential Building

Read this to understand how COLORSTEEL® contributes to credits under the Homestar rating tool.

Download document
Environmental Product Declaration – Rollforming Data Addendum

Environmental Product Declaration Brochure

Learn about the COLORSTEEL® Environmental
Product Declaration.

Request a copyDownload
Environmental Product Declaration – Rollforming Data Addendum

Environmental Product Declaration – Rollforming Data Addendum

This document includes updated Environmental Product Declaration results for rollformed COLORSTEEL® product.

Request a copyDownload

COLORSTEEL Sustainability FAQ

What is New Zealand Green Building Council (NZGBC)?

New Zealand Green Building Council (NZGBC) is a non-profit membership organisation that promotes better buildings, because better buildings mean healthier, happier people. NZGBC manage the Homestar and Green Star rating tools for NZ.

What is Homestar?

Homestar is an independent rating tool for assessing the health, efficiency, and sustainability of homes across Aotearoa. Version 5 of the tool was released in August 2021.

What is Green Star?

Green Star is a rating tool to support stakeholders in the property and construction sectors to design, construct and operate projects in a more sustainable, efficient and productive way. It provides tenants with a trusted mark of independent verification to support decision-making. Green Star is for commercial building projects.

There are four separate Green Star rating tools currently applicable in New Zealand:

  • Green Star - Design and As Built NZv1.0
  • Green Star - Interiors NZv1.0
  • Green Star - Performance NZv1.0
  • Green Star - Communities

What are the applicable Credits where COLORSTEEL® could potentially achieve points?


  • Credit EN3 - Sustainable Materials

Green Star:

  • Credit 19 – Life Cycle Impacts
  • Credit 21 – Sustainable Products

What are Categories, Credits, Points and Criteria?

The rating tools are organised into Categories, addressing key themes of sustainable building. Within each category, are Credits that address specific areas within that category. Each Credit has a specified number of Points available, providing the Credit Criteria are met.

How many points are available under Green Star and Homestar?

  • The Homestar v5 rating tool has a total of 120 points available within the tool, as well as 10 innovation points.

  • The Green Star Design and As Built NZv1.0 rating tool has a total of 100 points available within the tool, as well as 10 innovation points.

How do points result in a ‘Star Rating’ under Green Star and Homestar?

The total number of available points, and the points required to gain a particular Star level, vary between the rating tools, as shown below:

Homestar Award Level Required Score
Homestar 10 100+ points
Homestar 9 90 - 99.9 points
Homestar 8 80 - 89.9 points
Homestar 7 70 - 79.9 points
Homestar 6 60 - 69.9 points
No Rating 0 - 59 points
Green Star Award Level Required Score
Green Star 6 (World Leading) 75+ points
Green Star 5 (NZ Excellence) 60 - 74 points
Green Star 4 (NZ Best Practice) 45 - 59 points
No Rating 0 - 45 points

Can COLORSTEEL® itself get a Homestar or Green Star Rating?

No. Homestar and Green Star ratings are only awarded to whole buildings not to individual products or materials.

What is Environmental Choice NZ?

Environmental Choice is the official environmental label of New Zealand. Although initiated and endorsed by the New Zealand Government, Environmental Choice is firmly independent, recognising the increasing effort of manufacturers to reduce the environmental impact of their products and enabling consumers to reliably select products from companies who value reducing harm to the environment as much as they do.

What is ISO 14001?

ISO 14001 is a standard that defines criteria for an EMS. It does not state requirements for environmental performance but rather maps out a framework that a company or organization can follow to set up an effective EMS. It can be used by any organization that wants to improve resource efficiency, reduce waste, and reduce costs. Using ISO 14001 can provide assurance to company management, employees and external stakeholders, that the organisation’s environmental impact is being measured and improved.

What is an EPD?

An EPD, Environmental Product Declaration, is an independently verified and registered document that communicates transparent information about the life-cycle environmental impact of products.

What is DECLARE?

Declare is an ecolabel that answers 3 questions – where does a product come from? What is it made of? And Where does it go at the end of its life. It is a transparency platform and product database. Declare Labels can contribute to the Living Building Challenge and LEED v4

What is the ‘Red List’?

The materials red list (commonly shortened to simply “red list”) is a compilation of harmful-to-human chemicals and materials compiled by the International Living Future Institute (ILFI) as part of its Living Building Challenge.

What is the Sustainable Steel Council?

The Sustainable Steel Council (SSC) is a group of industry leaders committed to the circular economy and New Zealand’s low-emissions future. NZ Steel is a member of the Sustainable Steel Council in NZ and has a representative on the Board.

What is the World Steel Association?

World Steel Association, often abbreviated as worldsteel, is the international trade body for the iron and steel industry. The association is one of the largest and most dynamic industry associations in the world, with members in every major steel-producing country. Worldsteel represents steel producers, national and regional steel industry associations, and steel research institutes. Members represent around 85% of global steel production.

What is the World Steel Association Climate Action Programme?

The worldsteel Climate Action Recognition Programme recognises steel producers that have fulfilled their commitment to participate in the worldsteel CO2 emissions data collection programme.

In 2008, Climate Action was launched, under which companies report data on site- or company-level CO2 emissions. A participating company or site receives a report showing the process route average emission data and range to which it can compare itself. The data collection programme is at the core of the steel industry's global steel sectoral approach to climate change. Based on a common methodology, definitions and agreed boundaries, the data collection programme enables individual steel plants to compare themselves against both average and best performance and identify its scope for improvement.

Participation is open to all steel-producing sites or companies, worldsteel members and non-members alike.

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