According to Article 2 of the Property Management Regulations, property management is an activity of property management companies to repair, maintain and manage houses and their supporting facilities, equipment and related sites, and to maintain environmental sanitation and order in relevant areas. The scope here refers to the public parts of the property after the warranty period expires (self-use parts can also be agreed). The external wall you mentioned belongs to the external wall of the community, and the maintenance responsibility must be borne by the property company. If repeated reports have no results, please talk to his leader. According to Article 69 of the Regulations, if the property fails to perform its management duties and constitutes a crime, criminal responsibility shall be investigated according to law; If it does not constitute a crime, it shall be given administrative sanctions according to law.