The sports halls on the first floor also adopt a similar architectural and environmental strategy. Facing the west is a large roof with a long overhang that descends to a low level, warping downwards and doubling up as the façade. The overhanging roof also ensures that the walkways are protected from heavy rainfall and hot tropical sunshine yet remain porous for ventilation. The overhang of the roof addresses the sun on the west side to reduce the strongest solar gain. The glazed north and south façades provide views and allow light to stream into the building, decreasing overall energy consumption. The building’s openings are aligned to prevailing wind directions to maximise natural airflow along the walkways. 55 percent of the areas in the building are not air-conditioned, substantially reducing the energy used for building operations.