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TABLE OF CONTENTS - The Professional Green Building Council

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<strong>The</strong>me B: Creating a livable, healthy and environmentally viable citiesFigure 5:Biotechnical research to test out the plant performance, species selection,soil thickness, fertility persistence and nutrient loss7. GREENING COVERAGE AND RO<strong>OF</strong> GREENINGExpanding the targets of intensive /extensive green coverage is one of thefundamentals to materialize an ecological community [9]. Completed phases atYT/EHC developed over the last 10 years have a greening coverage at around 10%.Conscious of the need to enhance green coverage, HA has a standard since 2000 ofplanting a tree for every 15 built flats.At YT/EHC, major breakthroughs in greening coverage have been made forprojects in the pipeline. Podiums of low rise commercial developments andshopping spines have been fully maximized for intensive or extensive roofgreening resulting in a greening coverage percentage of over 40% at YT Phase 4and EHC Site Phase 6. Roof greening are also applied elsewhere on lift tower,ground floor canopy and intermediate floors of domestic blocks. A green tract [10]provides major enhancement to visual comfort. Roof greening could effectivelyreduce the surface temperature for 20 - 30˚C as compared to hard roof surface. Itreinforces building insulation and energy efficiency and lowers the overall heatisland effect.192

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