These structures also include aluminum-façade windows, aluminum-glass facades, ventilated facades and other structures. Their application depends on the usage and desired effect. Nowadays they are used primarily on commercial or commercial-residential facilities. Their usage is frequent and according to standards in achieving energy efficiency reduction. By using glass roofs, light penetrates into some parts of a building where it is not possible to achieve that by using regular methods (none of the room walls are exterior) through the windows. Ventilated facades are most efficient when it comes to maintenance and achievement of energy efficiency. With various systems such as alubond, eternity, fundermaxtrespa, remarkable appearance of facilities is achieved. Winter glass gardens are applied on catering facilities especially where summer terrace should be turned into an enclosed part of the same facility.