The amount of gas, electricity and other energy resources consumption is directly dependent on thermal insulation of the building. When calculating the cost for thermal insulation it should not be forgotten that the service life of the material is at least 20 years, and this procedure can reduce cost for heating by 50-80%. Up to 40% of heat is lost through the walls. The only possible way to reduce heat loss through the exterior envelope is the wall insulation. Heat loss problem applies not only to the harsh climatic conditions of Russia but also European countries with the moderately monsoon climate. Based on the data obtained under the program of international internship «Master Degree in Innovative Technologies in Energy Efficient Buildings for Russian & Armenian Universities and Stakeholders» at the University of Genoa (Italy), the article discusses the possibility of using European technology of thermal insulation of external walls in order to implement the green building concept under conditions of the transition from continental to marine climate of St. Petersburg. Considered technology is actively used in North Italy, Germany and Canada. During the work, data were obtained on the heat engineering characteristics of the method, life cycle assessment of thermal insulation materials was made, and economic feasibility of measures is given.