In order for the sash to open easily and smoothly, special videos are used, thanks to which the entire structure works silently and smoothly. There is a rubber seal between the glass and the sash, which protects the room from moisture and dust. With such glazing the balcony, the air temperature in it will be 8 degrees higher than on the street. Cold glazing guarantees the protection of the room from dust, wind and atmospheric precipitation. Unlike plastic and wooden window structures, aluminum does not need to be painted, so its use is more convenient and light.