There is water leakage upstairs, what should the property do?

Negotiate with the upstairs first and tell them that the water leakage is the responsibility of the upstairs. Laws and regulations clearly stipulate that the property also has the obligation to help negotiate. If there is no result, you can directly file a lawsuit, and whether the lawsuit will win or not depends on the implementation. All related losses caused by water leakage shall be borne by the upstairs. If you don't want to take this step, you can also use professional back material UD00 1 high-strength special impervious slurry to treat the ceiling at home, which can achieve the effect of plugging.