it depends on the contract signed with the property when buying a house. If there is an agreement in it, they are responsible for the maintenance of the public part. If it's just a leak in an individual's home, the developer will copy and repair it within the 5-year warranty period, and after 5 years, it may have to pay for the repair itself. Responsibility for development during the maintenance period. During the maintenance period, the property has the obligation to coordinate, notify and inform. Outside the maintenance period, the maintenance expenses should be paid from the public maintenance fund for maintenance.

what should I do about water leakage in the external wall of a building? 1. After finding the causes of water leakage in the external wall of a building, we can take some measures. For this type of water leakage in the external wall, we mainly repair the mortar layer, surface cracks, empty drum layer and leaking micropores of the external wall, so as to restore the waterproof protection function of the cement mortar layer. The concrete method of building external wall leakage is to chisel out the empty drum part of cement mortar layer, and then repair it with polymer cement mortar, in which polymer and cement mortar should be plastered in layers, and the thickness should be based on repairing and leveling the wall surface.

2. In the leakage of external wall, if the gap on the wall surface is wide, it should be wetted with water first, and then the gap should be filled with inorganic waterproof plugging materials. If the gap is narrow, polyurethane waterproof coating can be used to brush the gap. The thickness of external wall leakage of buildings should be controlled between 1-1.5 mm in the brushing process, and the width of the gap should be based on whether the inorganic waterproof plugging materials can be filled. If it can be filled, then

What are the common causes of house leakage? 1. The developer caused the house by quality problems.

2. The upstairs residents have infringed on the downstairs residents due to house decoration, pipeline reconstruction and improper water use.

3. The renovation of the downstairs residents caused damage to the roof, resulting in leakage.

4. The natural aging of waterproof materials caused by the long-term use of the house leads to leakage.