What should I do if the roof of the seventh floor leaks and the sixth floor is damaged?

Doing waterproof treatment quickly is the best way to solve the problem. The problem of water leakage on the seventh floor has always existed. Who will handle it depends on your situation. Discuss it yourself. If it is the responsibility of the landlord, ask the landlord. The leakage of concrete roof may be because it was not waterproof at the beginning, or the waterproof layer has been damaged for a long time, and then cracks appear in the sinking floor of the foundation, which will seep when it rains. Find the water leakage point first, and then suggest that AA-HA concrete roof should be used as a whole, with three coats and one cloth, continuous full adhesion and seamless waterproof system. It can be completely solved. The warranty period is 10 year, and it has been used for more than 25 years.