High quality hurricane resistant soundproof balcony double glass aluminum folding accordion door

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 window with an Rw value of 30. Every improvement in Rw value equates to a reduction in decibels of 1.

                     ALUFRONT"S Certificate of Honor

Dear Buyers:

Alufront windows designed according Germany advanced and modern window design, with high performance wind loading ,water resistant ,air resistant.
Alufront's windows and doors have been tested according to US and Australian standard, for thermal rating and Acoustic are above the international standard.
Alufront's products are approved by AAMA,CSA,WERS,NFRC standard. 

We're so glad to inform you that we have Trade Assurance amount of USD 510,000 which granted by Aliababa.com .
 means you will get 100% payment refund up to Trade Assurance Amount if we can't meet agreed delivery and quality terms contained in the contract. It is a free service for both of us. I think you can place order to us with confidence . For more information about Alibaba.com Trade Assurance ,please find //tradeassurance.alibaba.com

Welcome to contact us for more details of our products, thanks for choosing ALUFRONT, you will be delighted with our products and service.

Best regards,
Alufront Sales Team
Skype: alutec020
whatsapp:18925167558
wechat:18925167558
Cell :86-18925167558 (Michelle Wang)