EFFICIENCY OF OPERATION OF EXTERNAL THERMAL INSULATION SYSTEMS FROM THE POSITION OF THE EXPEDIENCY OF REPAIR WORK

As a result of the research, it was found that in the construction industry, when insulating external enclosing structures, in most cases, their effective operation over time takes a special place. In modern conditions, the issue of obtaining an economic effect from the operation of insulated buildings is of great importance. Insulation of building facades is carried out mainly by external thermal insulation systems with plaster finishing, and to a lesser extent, systems are used in which cladding is carried out by industrial elements with a ventilated air layer. For thermal insulation systems, it is important that the level of operational efficiency is not lower than the calculated one or is maintained within acceptable limits throughout the entire service life. It was established that when assessing economic efficiency according to the first option for short-lived technical systems, the condition must be met under which the cost of the new system would not exceed the cost of the outdated one. Since thermal insulation systems are structures of long-term operation, such a condition is difficult to fulfill due to the fact that the replacement of the layers of the system, as a rule, occurs after a certain specified time, which can reach up to 30 years. In this case, it is necessary to fulfill the requirement that the ratio of the cost of a new structure with the costs of performing the replacement to the designated service life would be less than the ratio of the cost of an outdated structure with the costs of its operation to the actual service life. It has been established that in order to make a rational decision on the further operation of the thermal insulation system, along with traditional methods of assessing the technical condition and developing recommendations for its further operation, it is necessary to perform an assessment of the economic effect when adopting a particular method of repair or restoration.