SOUNDPROOFING OF BTO DEVELOPMENTS

Murali Pillai
2 min readJan 26, 2023

I filed a PQ to understand what structural soundproofing measures are adopted within HDB units. In his reply, the Minister for National Development, Mr Desmond Lee, revealed that the Sound Transmission Class (STC) of HDB units is at least 45, which is above the STC of about 40, which is considered as suitable for residential units. I am glad to note that HDB pays attention to this important issue when designing and developing BTO flats. My PQ and Minister’s response may be accessed below.

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Mr Murali Pillai asked the Minister for National Development whether HDB is minded to publish the Sound Transmission Class (STC) and Impact Insulation Class (IIC) ratings for their BTO developments to enable potential buyers to assess the structural soundproofing qualities of the units.

Mr Desmond Lee: We are mindful that residents are concerned about the structural soundproofing qualities of their units. As such, acoustic insulation and performance of soundproofing are carefully considered when designing and developing BTO flats.

HDB uses drywalls for internal partitions which are of Severe-Duty grade, with a Sound Transmission Class (STC) of at least 45, which is above the STC of about 40, considered as suitable for residential units. Hence, all HDB flats meet the required quality and acoustic insulation and performance.

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Murali Pillai

Member of Parliament, Bukit Batok SMC, Advisor to Bukit Batok SMC GROs.