Repairs are carried out constantly and universally. If you live in an apartment building, then by the noise of a working tool you can judge that this process does not stop for a day. Therefore, when choosing a contractor, ask him to show the objects that they have already repaired. And it is best to contact the owners of the apartments where they have already done work. Talk to them. Information does not happen superfluous, and from the error in choosing a contractor you will be insured with this approach.