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Effect of Roof Tile Colour on Heat Conduction Transfer, Roof-Top Surface Temperature and Cooling Load in Modern Residential Buildings under the Tropical Climate of Malaysia

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Institute of Self-Sustainable Building, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Malaysia
2
Office of International Affairs, Universiti Teknologi MARA, Shah Alam 40450, Malaysia
*
Author to whom correspondence should be addressed.
Academic Editor: Asterios Bakolas
Sustainability 2021, 13(9), 4665; https://doi.org/10.3390/su13094665
Received: 23 February 2021 / Revised: 7 April 2021 / Accepted: 10 April 2021 / Published: 22 April 2021
Modern residential roofs in Malaysia mainly employ red and brown roof tiles due to aesthetic factors and the ability of the roof surface to reflect or retard heat transfer is typically not considered the main priority. The present article reveals the findings of a study on the effect of roof tile colour on heat conduction transfer through roof tiles and ceiling boards, roof-top surface temperature and cooling load. Findings suggest that the selection of white roof tiles significantly reduces the peaks of heat conduction transfer and roof-top surface temperature as well as the values of heat conduction transfer and roof-top surface temperature throughout diurnal profiles, which consequently reduces hours of indoor thermal discomfort and use of air-conditioners in indoor spaces. A decline in peak roof-top surface temperature of up to 16.00 °C that results in annual energy savings of up to 13.14% can be achieved when the roof tile colour is changed from red to white. Further research on the development of solar-reflective paint or coating products that can significantly increase the solar reflectance values of non-white roof tiles are essential to overcome issues related to maintenance difficulties and lack of preference among house buyers towards white roof tiles. View Full-Text
Keywords: air-conditioner; cooling load; heat conduction; residential building; roof tile colour; roof-top surface; solar reflectance; temperature; thermal comfort; tropical climate air-conditioner; cooling load; heat conduction; residential building; roof tile colour; roof-top surface; solar reflectance; temperature; thermal comfort; tropical climate
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MDPI and ACS Style

Farhan, S.A.; Ismail, F.I.; Kiwan, O.; Shafiq, N.; Zain-Ahmed, A.; Husna, N.; Hamid, A.I.A. Effect of Roof Tile Colour on Heat Conduction Transfer, Roof-Top Surface Temperature and Cooling Load in Modern Residential Buildings under the Tropical Climate of Malaysia. Sustainability 2021, 13, 4665. https://doi.org/10.3390/su13094665

AMA Style

Farhan SA, Ismail FI, Kiwan O, Shafiq N, Zain-Ahmed A, Husna N, Hamid AIA. Effect of Roof Tile Colour on Heat Conduction Transfer, Roof-Top Surface Temperature and Cooling Load in Modern Residential Buildings under the Tropical Climate of Malaysia. Sustainability. 2021; 13(9):4665. https://doi.org/10.3390/su13094665

Chicago/Turabian Style

Farhan, Syed A., Fouad I. Ismail, Osamah Kiwan, Nasir Shafiq, Azni Zain-Ahmed, Nadzhratul Husna, and Afif I.A. Hamid 2021. "Effect of Roof Tile Colour on Heat Conduction Transfer, Roof-Top Surface Temperature and Cooling Load in Modern Residential Buildings under the Tropical Climate of Malaysia" Sustainability 13, no. 9: 4665. https://doi.org/10.3390/su13094665

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