COLORBOND® Coolmax® steel

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COLORBOND® Coolmax® steel is specifically designed to provide and maintain high solar reflectance [Nominal Solar Reflectance= 0.77. Solar Reflectance Index (SRI) = 95, 3-year-aged SRI = 921] whilst delivering the same quality and durability that you’ve come to expect from COLORBOND® steel.

Increasing energy costs are a concern for many commercial and industrial building owners and tenants. So, it’s reassuring to know a roof made from COLORBOND® Coolmax® steel in the colour Whitehaven® could help reduce roofing temperatures and keep the building cooler2.  And it’s a smart design choice too – not only does COLORBOND® Coolmax® steel help mitigate the impact of Urban Heat Islands (UHI)3, but you can earn provision points with Green Star4 and may improve your NABERS5 rating.

To find out more and receive an indicative range of potential air conditioning cooling energy savings, visit the COLORBOND® Coolmax® steel calculator.

  1. Nominal values based on new product. SRI determined in accordance with ASTM E1980-11. Solar reflectance measured in accordance with ASTM E 903-96, standard test method for solar absorptance, reflectance and transmittance of materials using integrating spheres.
  2. Compared to conventional roofing materials of lower reflectance index (SRI), such as ZINCALUME® steel and all other roofing materials in the COLORBOND® steel range. Any savings and or the extent to which a building is cooler may vary and depend upon the particular circumstances of your building, including building location, level of insulation, location of air-conditioning when installed, building shape, building function and environmental factors. For further information refer to the Stockland case study
  3. For more information on UHI visit
  4. For more information on Green Star rating system visit –
  5. For more information about NABERS visit –