HDB Car Park – Punggol, Singapore


To facilitate planting on the RC rooftop of the Car Park to provide a Green Roof that is attractive and offers effective thermal insulation to reduce urban heat island effect.


VersiDrain 25P drainage and water retention trays were installed over the waterproofing membrane. Geotextile was then laid over the VersiDrain 25P and EnviroMix GR lightweight inorganic planting media positioned evenly on top followed by planting of various drought tolerant and colourful plant species arranged in attractive patterns. Water retained by the trays during wet periods is returned to the planting media by capillary action during dry spells to maintain healthy plants.