The facade is the outer side of the architectural structure. The facade is the main, side, rear, street, courtyard facade. Famous and popular for centuries, the elements of the facade of buildings of various functional types are the portal (the main entrance), the portico (gallery based on columns), spun (a section of the wall between the towers), colonnade, pediment (completion of the facade of the building, limited locally by two roof slopes) , windows, doors. In the manufacture of facades of buildings, depending on the placements of the load -bearing walls performed by the roles building, the following types of materials are used: natural stone (limestone, marble, granite, travertine and others), artificial stone (architectural concrete) as well as siding (cladding in the form of horizontal panels (from vinyl, metal, steel, wood, cement).