This paper presents a comparative study on thermal insulation coatings and their effect on lowering building surface and indoor temperatures. At first, eight reflective coatings from international market, Wakkanai Siliceous Shale (WSS) mortar coated and an uncoated concrete blocks were experimented for comparison. The study reveals that lighter coatings have higher albedo and lower heat flux which can reduce the surface temperature up to 6.9°C than the uncoated one. Next, periodic experimentation was conducted and from the results WSS particle coating was found to be the best to lower the indoor surface temperature (5.8°C). This study can support in choosing more appropriate coatings for building envelopes and contribute to the reduction of heat island effect.
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