Complex of interconnected buildings: dormitory, connecting neck, school and gym with outbuilding. The peripheral masonry of the connecting neck and gym building was fitted with a contact thermal insulation system, the roofs were insulated and all external fillings of the openings were replaced. Most of the new windows were plastic from system profiles with double glazing. Insulation of the roof was performed with full insulation of the upper shell and closing of any air ducts. The original cladding was dismantled, including the existing thermal insulation, except for the supporting steel structure on which the KINGSPAN sandwich wall panels were mounted.