The leak upstairs damaged the roof of my house. I'm going to sue upstairs and ask the property to issue a mediation certificate and a water leakage certificate. How should I write it?

Taking a good picture of water leakage is proof. Write down your community, building number, unit number and room number. Is your house a new one or an old one? If it is a new house, find a property company or developer, and the waterproof warranty is five years. It is not easy to deal with old houses. You can communicate with them upstairs in advance. If they don't want to repair it, you can ask the street office for mediation.