The subject of the project is a comprehensive thermal modernisation of the public utility building, which is the building of Primary School No. 13 at ul. The National Army of 1 in Tarnowskie Góry. Comprehensive thermomodernisation will consist of: replacement of door carpentry, repair of reinforced concrete elements, refurbishment of chimneys, insulation of stropodache, insulation of entry roofs, lightning installation, insulation of plinth and walls above the plinth, modernisation of central heating system and installation of energy-saving LED lighting. The aim of the project is to thermal insulation of the premises and to improve the thermal conditions of the facility, as well as to increase the comfort of use of the building as well as to reduce the demand for energy necessary for its heating.