This measure includes the removal of old windows and the installation of modern plastic or metal-plastic windows. It is recommended to use a window profile of not less than 5-chamber, double-pane window units 4і-10-4-10-4і, with a soft energy saving coating that reduces heat losses with the radiation heat exchange. The recommended thermal resistance of the window structure is 1.10-1.33 m2·оС/W, but not less than 0.75 m2·оС/W (according to DBN V.2.6-31:2016). If the windows have already been partially replaced in the building, it is necessary to replace only those windows which do not comply with the above thermal resistance (even if these are previously replaced windows).

Replacing a window with a modern one can cost up to UAH 2,700 per m2.