Top Quality Product Warranty Soundproof Tempered Glass Aluminium Security Folding Window Door comply with Australian standards on China WDMA Type:Bifold Alfresco living rooms

Alfresco living rooms

silver black Electrophoresis: golden

About 20 to 30kg for each Carton

Whether for a new home construction project

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Top Quality Product Warranty Soundproof Tempered Glass Aluminium Security Folding Window Door comply with Australian standards on China WDMA Type:Bifold Alfresco living roomsCertifications 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