Thermal insulation is an important measure for energy saving. Improving it leads to reduced energy loss and, consequently, lower energy consumption by heating systems, such as burners, radiators, air conditioners, or other cooling and heating units, while also helping the room temperature recover quickly. The reduction in operating costs, combined with the long-term use of a building, leads to the optimal investment of money. A living space with high standards of residential comfort is always attractive to future buyers or tenants. This factor will play an increasingly important role in shaping the commercial value of a building in the future. Especially due to the sharp increase in oil and natural gas prices, thermal insulation is of great importance and becomes even more significant with the introduction of the energy certificate for buildings.