Casement window is characterized by high watertightness and air tightness. At present, the national building regulations do not install open windows on more than 7 floors, because safety factors are considered. If it is casement window inside, it occupies a lot of space. The whole room is very beautiful and cannot be installed with curtains at the same time. If curtains must be installed, the effect will be affected by the curtain switch. At the same time, casement window is used at the high level. Security is a big problem. Many safety cases have happened, which are equipped with casement window, and the sky falls off and hurts people over time.
At the same time, sliding windows will be cheaper, so it is becoming more and more popular in the decoration market. Although air tightness and water tightness are worse, if the materials used are better, there is not much difference in heat insulation and sound insulation.
In ordinary commercial housing, we rarely have casement window.
