Facebook user Keenon Lee Pei Hong, posted a video onto the group Complaint Singapore, documenting how he discovered styrofoam inside a toilet wall during construction.
The Housing and Development Board (HDB) have since clarified that they are aware of the video circulating online, according to Today.
They said that the foam Lee found inside the walls is polyethylene foam, which is allowed for use in construction.
HDB added that the foam is “sandwiched between two layers of cementitious mortar and reinforced with wire mesh, to form a sandwich wall panel.”
They added that it provides properties such as sound insulation and good thermal properties, and that they do not affect the structural safety as they are used for internal partition walls.
However, HDB added, sandwich wall panels with polyethylene foam are no longer in use in HDB flats today, although they are still being used overseas.
HDB further added that they have continued to apply new ideas and technology to improve the quality of flats, with the sandwich panels being replaced in newer flats with drywall, or light concrete panels, which contain sound dampening materials and offer good sound insulation.