Recently, the movement of remodelers has gained wide scope in our country. They monitor the condition of apartments, stairwells, elevators and various equipment of residential buildings, carry out minor and current repairs of housing. In a word, they help to maintain houses in exemplary order. And what is the exemplary maintenance of the housing stock? This is primarily preventive maintenance. Timely correction of minor defects in the structures of houses protects them from further destruction and thereby increases their durability.