What should I do if the leaking property on the top floor is delayed?

Waterproof 5-year warranty, which should be the responsibility of the developer, has expired. Because it is a public part, it depends on the specific property contract. If there is no agreement, the property can generally help with maintenance, but the cost is still shared upstairs and downstairs, rather than having to be repaired by the property. You can find someone to repair it yourself, just discuss it with the upstairs and downstairs in advance, and it is not easy for local maintenance to apply for a maintenance fund. Provide professional technical consultation on waterproof and leakage repair of concrete free of charge, so as to avoid the troubles of repairing today, leaking tomorrow, repairing every year and leaking every year.