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Background of the Study

Basic definition

In our study, we adopted the following definition:

“A roof area of plantings or landscape installed above a waterproofed substrate at any building level that is separated from the ground beneath it by a man-made structure.” – NRCA Green Roof System Manual 2007

There are more definitions from different institutions of similiar meanings, for details please visit 'What is roof greening'.

 

1. Amenities and asthetics benefits
2. Environmental benefits
3. Economic benefits
Intensive Roof System
  • recreational purposes 

  • larger variety of plants

  • costly: installation and maintenance

Extensive Roof System
  • greening purposes only

  • limited to short plants like grass and mosses

  • cheaper: installation and maintenance

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