The window installed in the room, thanks to the use of glasses in its design, performs two functional tasks at once: to clarify the room and protect it from adverse weather conditions. The fulfillment of the first task was made possible thanks to the special property of glass — high transparency. The performance of the second task is directly affected by both the installation of windows and their design. Even the most advanced window design can be irrevocably spoiled due to poor-quality installation.