Khrushchevs are customary to call panel and brick houses, as a rule, five -story buildings built in our country in the middle of the past century. For several decades of operation, they, initially not distinguished by great durability, already managed to exhaust their declared life. Including their wooden window frames, which have long rotted and need urgent replacement. There are no garbage and elevator in such houses, and thermal insulation and sound insulation are at a fairly low level compared to modern new buildings.