• 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

 

Quieter Type Blade Saw

The contact between the saw blade and the workpiece creates vibration during sawing which causes high noise generation. Quieter type blade saw, such as noise reducing diamond blade, with higher speed and smoother blade reduces the excitation of vibration and hence the propagation of sound.

 

Courtesy of Modern Concrete Drill Cut Co., Ltd.

Courtesy of Hilti(Hong Kong) Ltd.

Sound pressure level in dB(A) at 7m from equipment 76-81dB(A)