Who is responsible for the loss caused by the illegal construction of the roof of the property?

First of all, the housing maintenance fund clearly stipulates that it must be used for the public part of the house. It is impossible to use the housing maintenance fund to repair the indoor damage of your house. Secondly, the roof drains slowly. What is the reason? If the drainage is too slow due to the blockage of the roof drain, the property is not cleaned in time, which leads to the property commitment; If the drainage is slow because the drainage pipe is small, the development unit will bear it; If the size of the drainage pipe is enough, it is usually DN 1 10PVC pipe. If the roof area is small, DN75 is also available. The property also cleaned the drainage pipe in time. Simply because of the heavy rainfall, the expenses shall be borne by the owner himself. Have I made myself clear? The warranty period of roofing with waterproof requirements is 5 years.