Who should I call to repair the leaking roof? There is no property management and no owners' committee in this community.

Waterproof warranty for 5 years and pipeline for 2 years. During the warranty period, the developer is not responsible. If not handled, you can complain to the local quality supervision department. They specialize in this matter, and then you can't go to court, or you will be responsible for the delay of the warranty period! In addition, if the same place is not repaired twice during the warranty period, you can find someone to repair it yourself, and the cost will be borne by the developer. The roof of this building is for public use. After the warranty period, minor repairs should be shared upstairs and downstairs. If you can apply for a maintenance fund for an overhaul, it goes without saying that you can't apply, and it is also shared upstairs and downstairs. You can ask for more information and better suggestions, and provide professional technical suggestions for repairing waterproof and leakage of concrete for free, so as to avoid the troubles of repairing today, leaking tomorrow and repairing year after year.