What should I do if the villa's outer wall leaks? How to check?

The seepage of the external wall of the new house should be fed back to the property and handled by the developer.

The seepage of external wall of new house belongs to the quality problem of building construction. According to Article 7 of the Measures for Quality Warranty of Building Engineering No.80 issued by the Ministry of Construction of People's Republic of China (PRC), the second paragraph stipulates that "the roof waterproof project, the leakage prevention of toilets, rooms and external walls with waterproof requirements is five years", and the responsibility for this problem should be borne by the original building owner.