Extract

Roof albedo has been demonstrated to be a successful tool in the pursuit of reduced energy loads in buildings, as well as providing other benefits, such as reduced urban heat island effect and benefiting micro-climates. The monitoring of three 11m2 buildings shows that there are significant heat load reductions; internally of up to 5°C and externally the high albedo roofs being up to 30°C cooler. Further data on reflectivity from the high albedo roofs show a threefold increase in reflection of the sun’s energy. All these findings confirm that using high albedo paint on corrugated roofs with no insulation in Melbourne will reduce cooling requirements and reduce contribution to the Urban Heat Island effect of these roofs by up to 4.2 MJ/m2

 

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