The knob placed around the window or door is a decorative building element for aesthetic purposes. the stones found in the windows and doors around historical buildings are also used to remind us of our time constructions and to create an aesthetic appearance. The wares are produced from various materials, but most are made of polystyrene (foam) knives. The styles have different models and sizes. If the ceiling model is not used, the dust and dirt that accumulates on the sawn timber will form permanent stains from the facades along with the precipitation. This aspect should be taken into consideration in the design of the facade and the materials to be used should be selected in consideration of every meaning.