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The Influence of Extensive Green Roofs on Roof Thermal Performance in Batu Pahat Climate

  • Mohd Norfekry Md. Yacob
  • Hartini KasminEmail author
  • Mohd. Khairul Adam Mohd. Kori
  • Wan Afnizan Wan Mohamed
  • Siti Nazahiyah Rahmat
  • Mohd. Shalahuddin Adnan
Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 53)

Abstract

Climate change has increased global temperatures. When air temperature rises, it affects the condition of urban areas and creates discomfort among inhabitants of buildings. A potential sustainable approach to overcome the global warming issue is to implement green roof technology. This study aims to determine the effect of green roofs on roof thermal performance and to identify the best plant species which has the potential to lower temperatures. This study also determined the U-value, R-value, k-value and heat-flux parameters that constitute the thermal behaviour of green roofs. Three identical small-scale roof houses were constructed with one non-vegetated roof house as a control while the other two vegetated roof houses were planted with Portulaca G. and Alternanthera P., respectively. Surface roof temperatures were collected from both inside and outside the roof of each house. Results show that the average differences in temperature inside the building between the control roof and the green roof were 0.02 °C and 0.22 °C for Portulaca G. and Alternanthera P., respectively. Meanwhile, the average differences in temperature on the control roof and the green roof were 1.12 °C and 2.84 °C for Portulaca G. and Alternanthera P., respectively. The heat flux value of Alternanthera P. roof is 3.15 w/m2 better than Portulaca G. roof at 7.72 w/m2. This concludes that the roof with Alternanthera P. reduces heat that travels through the roof layer better than Portulaca G.

Keywords

Green roof Roof thermal behaviour Climate changes Thermal conductivity 

Notes

Acknowledgements

The authors would like to acknowledge the financial support provided by Universiti Tun Hussein Onn under the Postgraduate Incentive Research Grant (GIPS—1351) and the Exploratory Research Grant Scheme (ERGS—E052) which made this study possible. The authors would also like to thank the Research Centre for Soft Soil (RECESS), UTHM, for the opportunity to use its laboratory sites for the green roof test beds.

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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Mohd Norfekry Md. Yacob
    • 1
  • Hartini Kasmin
    • 1
    Email author
  • Mohd. Khairul Adam Mohd. Kori
    • 1
  • Wan Afnizan Wan Mohamed
    • 1
  • Siti Nazahiyah Rahmat
    • 1
  • Mohd. Shalahuddin Adnan
    • 1
  1. 1.Micropollutant Research Centre, Jabatan Kejuruteraan Air Dan Persekitaran, Fakulti Kejuruteraan Air dan PersekitaranUniversiti Tun Hussein Onn MalaysiaParit Raja, Batu PahatMalaysia

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