The window frame of the fixed window is embedded in the wall body, the glass is installed directly on the window frame, and the joints between the glass and the window frame are sealed with tape befor…

The advantages of flat window are large open area, good ventilation, good sealing, sound insulation, heat insulation, anti-permeability.

The physical performance of doors and windows mainly includes air permeability, rainwater leakage, wind pressure resistance, heat preservation, sound insulation, lighting performance 6 aspects.