摘要：The article notes that the main heat losses during major repairs of buildings of historical development are associated with low thermal resistance of external wall fences, due to the lack of thermal insulation of balcony doors. The purpose of the study: to show a significant reduction in costs in the capital reconstruction of former apartment buildings, of which there are more than one and a half thousand in St. Petersburg, due to the use of innovative thermal insulation materials. Methods: thermal imaging, laboratory research. Results: as a result of studying the humidity regime, the experimental section of the wall, determining the dew point, resistance to vapor permeability, air permeability, and construction properties of historical bricks, the authors suggest that buildings of historical development follow the rule that provides for insulation of the external walls of these buildings from the inside.
