BlueScope and Stockland conducted a modelling study to account for above roof micro heating, and explore just how much the inclusion of micro-climate effects in energy modelling could impact predicted cool roof energy savings. Using a Stockland shopping centre's 15,000 square-metre roof as a reference case, the study compared the thermal performance of roofing made from conventional ZINCALUME steel with COLORBOND Coolmax steel in the colour Whitehaven. COLORBOND steel in the colour Surfmist was also compared, with results finding improved performance over conventional ZINCALUME steel roofing, albeit less than for COLORBOND Coolmax steel roofing broadly in line with their thermal surface properties.