1. The features of the Bridge-cut-off aluminum windows and doors

  (1). Watertightness 7A

（2). Air permeability 2 Class

（3). Resistance to wind load C3 Class

（4). Thermal insulation

（5). Noise insulation 30-40db

（6). Burglar resistance

（7).  Radiation resistance

2. Broken bridge aluminum windows and doors:

Building Industrial has a strict quality control system on our Broken bridge aluminum windows and doors material.

There are various of shaped windows and doors  to choose, such as Sliding window, Awning window, Casement window,  Tilt & Turn window, Casement door, Fold door, Sliding door ect.

3. We also offer custom-shaped windows and doors according customers' specific requirements . We are making continuous efforts to develop different products of diverse performance, specification and style that precisely meet the requirements.