The system of thermally insulated roofings designed on the basis of the MORAD AF50 mullion-and-transom facade. The system allows building winter gardens with various wall shapes and field of roofs. Due to the high thermal insulation of the AD50 winter gardens, they can be used throughout the whole year. The advantage of this system is the possibility to build a roof supported by the eaves beam on the profile with hinges. The profile enables for roof pitch to range between 5-45° from the horizontal angle The eaves beam supports the external rain gutter to facilitate the rainwater drainage. When building vertical walls of winter gardens, any MORAD windows & doors system can be used. Both rafters and the eaves beam can be reinforced by standard aluminium or steel profiles, which allows creating wider spaces of the winter garden structure. It is possible to fill the roof using multi-chamber polycarbonate panels or glass. The range of the roof glazing is between 16 and 56 mm. The EPDM complements the system and make it water- and wind-resistant, while the PVC and polyethene foam insulators ensure the proper thermal insulation.