Abstract
White roofs are alleged to reflect the sun's rays back into space, reducing absorbed heat in the structure, and therefore reducing the cooling requirements of the inhabited space. This paper presents comparative field data on structurally identical buildings with an installation of a newly painted white (Taitania) roof compared to the neighbouring existing control (red) roof. This paper is the first in a longitudinal series covering all seasons. During two weeks of autumn/fall, it was found that as expected, there were significant variances in roof and roof cavity temperatures between the white roofed building and the control (red) roofed building. Further, it was found that the inhabited rooms in the two near-identical structures showed very similar temperatures during the cooler parts of the day, initially suggesting roof colour of a ceiling-insulated structure has very little impact on the temperature of the inhabited space, but that during the hotter parts of the of day there could be up to a 7°C temp...
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