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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 citiesAnnual Solar Heat GainReduction at the shoppingarcade (compared to singleglazed clear glass with no fins)GlazingOptionNofinsFin Option1m fins at 2.5m interval1m fins at 1.25mintervalSingle glazed, clearglass - 10% 21%Double glazed, clearglass9% 12% 22%Low-e double glazed 19% 20% 25%4.3 Enhancing Comfort Environment<strong>Green</strong> roof has positive effect on building environment, especially in thermalaspect. Planted roof would reduce the roof surface temperature, thus enhancingboth outdoor and indoor thermal comfort. Fig. 6 shows the surface temperatures ofa hard roof of a public housing block and a planted slope. It can be observed thatthe temperature difference could be up to 30°C. <strong>Green</strong> roof would also increasethermal insulation such that thermal loading for the building could be reduced. Ingeneral, green roof can reduce the cooling load for the floor underneath by around15% [1].Figure 6: Comparison of temperatures of hard roof and surface covered withplantation209

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