The object is a multi-family residential building, located in the city of Dimitrovgrad, "Patriarch Evtimiy" street, bl. #7. The building has 8 above-ground residential floors and one semi-underground floor. It was built in 1982. Replacement of window frames with double-glazed PVC with λ ≤ 1.40W/m2K, which will result in a reduction of the generalized coefficient of heat transfer through the windows from 2.47 to 1.40W/m2K. Delivery and laying of thermal insulation EPS /12 cm/ for facade walls, EPS (2 cm) for m2 boards around the windows, fiberglass mesh, reinforcing dowels, cement glue, putty and facade paint, scaffolding, etc. Pre-preparation of the roof slab, dismantling of old waterproofing, cleaning, delivery and laying of 10 cm thick XPS thermal insulation, laying of thermal insulation of 982.00 m2 roof slab on roof type 1 and reinforced cement screed. Delivery and laying of EPS thermal insulation (10 cm) for facade walls to an unheated ceiling, fiberglass mesh, reinforcing dowels, cement glue, putty and facade paint, scaffolding, etc., dismantling of sheet metal roofs (type 3) (above shared terraces on the top floor), supply and installation of sandwich panels 10 cm thick (for building a type of roof slab above shared terraces on the top floor), mineral wool 5 cm thick, waterproofing on the outside and lining with plasterboard on the inside: Delivery and installation of thermal insulation XPS (10 cm) for 133.92 m2 bay window, delivery and installation of thermal insulation stone wool (10 cm) for floor slab to unheated basement, delivery and installation of thermal insulation XPS (10 cm) for walls, fiberglass mesh , reinforcing dowels, cement glue, putty and facade paint and replacing 31.32 m2 of windows with double-glazed PVC windows