Waterproof: aluminum alloy doors and windows material with special formula, bibulous rate is less than 0.1%, the material itself are forms of double-layer sealing between sash, gaps are equipped with excellent sealing strip, and to open a drain box material position.
Angle is through mechanical welding forming, so the broken bridge aluminum alloy double hung window sealed performance is good, don't ooze water and moisture, noise insulation.
Request for Quotation
