The house bought in 2009 is leaking upstairs, and no one lives upstairs. What should I do?

Waterproof warranty for 5 years, pipeline warranty for 2 years. This period is the responsibility of the developer, and the property is only an assistance, although they are generally a company with the developer! If you ask for maintenance and compensation for losses, you should not be able to check out. If it is not handled, it is necessary to complain to the local quality supervision department. They are in charge of this matter. Provide free professional technical advice on repairing waterproof and leakage of concrete.