Top Quality Product Warranty Soundproof Tempered Glass Aluminium Security Folding Window Door comply with Australian standards on China WDMA Type:Bifold 宋体}#detail_decorate_root

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Sounds insulation: RW ≥ 30 dB

What home style is best suited for single hung windows

Max Door Open:1000 mm

Top Quality Product Warranty Soundproof Tempered Glass Aluminium Security Folding Window Door comply with Australian standards on China WDMA Type:Bifold 宋体}#detail_decorate_rootCertifications 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