• Renovation
    Renovation

Interior/ partial interior renovation works at the existing building would cause noise impact to the residents at neighbouring buildings or units. Concrete/ brickworks breaking and tiles/paint removal using handheld breakers are common noisy renovation works.  Sound power levels of traditional handheld breakers can generally reach 108 dB(A).  Use of some smaller mechanical equipment such as mini-breaker or innovative method such as high pressure water jet for tiles/ paint removal would generate less noise during renovation works.

Sound pressure level at 7 meters from equipment

 

Sound pressure levels of traditional and quieter equipment/ method for reference.

Noise reduction

 

Diamond coring tool

Diamond Coring Tool

 

Diamond coring tool can be used for fastening fixtures, as well as installing brackets for water pipes or electrical cables. Along with the electrically-powered water management system, wet coring can be performed in concrete and other metallic materials. The water management system can recycle water and supply water for the operation of wet coring, thus minimizing structure-borne noise and vibration. Moreover, it can also collect debris and hence reduce dust. Compared to traditional drilling tool, the use of diamond coring tool can reduce the transmission of structure-borne noise by about 4dB(A). In addition, air pollution generated by dust formation during machine operation can also be minimized.

 

Courtesy of Hilti (Hong Kong) Ltd.