Australian Standard aluminium double glazed windows folding glass window ventilation bifold window on China WDMA bifold We have the most strict

We have the most strict quality control

Hardwares and glass sheets

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operating over 8000 m² workshop which located Foshan City

Australian Standard aluminium double glazed windows folding glass window ventilation bifold window on China WDMA bifold We have the most strictCertifications ACOUSTICS TESTED WINDOWS & DOORS Sound or acoustic performance of a window is measured by the weighted sound reduction index or Rw value. Rw values are determined by measuring the reduction in dB achieved where a window is used to insulate against a sound source. The Rw value will increase as the acoustic performance of a window improves, so that a window with an Rw value of 40 has a signi cantly improved acoustic performance over a