Abstract
This study focused on the energy consumption by buildings that are the main source caused of GreenHouse Gas(GHG) which makes climate change and choosed green roof as a method to reduce energy use. Because green roof is classified as an eco-friendly construction method due to the effects of air purification, mental stability of plants and removal of fine dust. However, it requires the injection of many materials, which make problem about potential environmental pollution. Besides, it has disadvantage that cannot be revitalized well despite high investment costs. Cool roof which is low material and relatively inexpensive can be effective, but that is also made of artificial materials and need to be repainted with a short life cycle, which is a potential environmental concern too. This study research to find out what more sustainable construction methods through environmental, economic and eco-efficiency assessments of green roof and cool roof are, and what pros and cons are. This research period was set 40 years, while extensive cool roof and water-based cool roof were adopted and conducted.
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