Abstract
Pitched roof design represents the common system for the most tropical houses in Malaysia. Different angles and colours of this roof deliver various impacts on the indoor environment. This study focuses on estimating the amount of heat gain and roof surface temperature obtained from different roofing aspects. The paper hypothesizes that colour technique could change pitched roof design more than roof angles and materials. The research was based on simulation analysis applied on an actual room size with different roof angles (0°, 30°, 45° and 60°) in the Malaysian environment. As a result, the findings of different roofing systems affirm the hypothesis and show the significant of roof colour compare to area, angles and materials. This study contributes efficiently to the knowledge of the roofing design in the tropics. In addition, it will shed light on the economic sector and sustainability for optimum roofing concept particularly for low cost housing components in Malaysia.
Highlights
Research studies have estimated that urban areas could be covered by 60% of roofs and pavements (Akbari, Arthur, & Rosenfeld, 2008)
The results indicate that in various roof colours the behaviour of roof angle was varied significantly
It was realized that highest temperature for lighter colour was for roof angle 60° more than lower angles and especially flat roof while for darker colours the highest temperature for roof angle was 0° or flat roof
Summary
Research studies have estimated that urban areas could be covered by 60% of roofs and pavements (Akbari, Arthur, & Rosenfeld, 2008). This estimation is increasing as there are around 50% of the world population currently in urban regions, with expected increases to 70% at the end of 2040. Pitched roof system represents the most common construction design for traditional and modern buildings in hot humid regions. This type of roof has been extensively used in order to protect against rain water and strong sunshine as well as its consequent of lower heat transfer into the building. Concrete and cement tiles have the priority in the Malaysian urban area not due to thermal properties but because of low cost and good resistance to the weather conditions
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