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Lighter colour roofs typically have a low solar absorptance compared to darker coloured roofs. Solar absorptance is a measure of how much solar radiation the roof absorbs (0 indicates no roof absorbance and 1 indicates the roof absorbs 100%). Houses with a low solar absorptance roof heat up less in summer months and thus require less air conditioning.

Examples of the solar absorptance of roofing products include:


Bristile roof tiles

Harmony roof tile