Heat-reduction Retrofits in HDB Upgrading and Estate Renewal Programmes

Mr Leon Perera asked the Minister for National Development to what extent does the Ministry ensure that HDB Upgrading/Estate Renewal Programmes include considerations for heat-reduction through retrofits such as rooftop solar panels, green roofs and cool paints, with special attention paid to low-income blocks/precincts.

Mr Desmond Lee: HDB is continuously working on methods to reduce heat in our HDB estates. Under the Green Towns Programme for all existing HDB towns, HDB will be working with Town Councils to pilot the application of cool coatings on building facades and driveways. If this is assessed to be effective, the application of cool coatings can be extended island-wide.

Solar panels will also be installed at more HDB block rooftops as part of the Programme. In 2020, HDB announced a new solar target of 540 MWp to be installed on 70% of HDB blocks island-wide by 2030. This is more than double the previous target. These solar panels may shade the top of the roof from direct glare of the sun, hence potentially reducing heat experienced by residents.

In addition, urban farms, extensive greenery and community gardens will be gradually introduced to the top decks of Multi-Storey Car Parks (MSCPs) which can support these features. Besides offering visual and spatial relief, the greenery is expected to reduce the ambient temperature of our estates.