1, according to the national Measures for Quality Assurance of Building Engineering, the contractor shall provide a warranty period of not less than five years for waterproof construction, so even if the agreement you signed with the bank stipulates that the bank is not responsible for waterproof leakage, the contractor shall provide a warranty period of not less than five years in accordance with state regulations, so the agreement signed with the bank does not conform to state regulations and can be considered as invalid;

The bank installed outdoor advertisements on the roof. Because the roof of the building belongs to the public part of the stairs, it belongs to all the owners of the building. When the property is allowed to be installed, has the bank obtained the consent of all the owners? If not, the property owner also violated the interests of the building owner;

3. Banks install outdoor advertisements on the roof, which belongs to the building structure of the roof and involves problems that affect building safety. Is the transformation plan approved by the competent department of city planning administration?

4. Because the roof belongs to the public part of the building, after the waterproof warranty period provided by the developer expires, the property application is repaired with the public housing maintenance fund paid by the owner.