The property does not allow the balcony to be used as a screen, which is a modification of the facade.

It's not a facade modification. Property owners are not allowed to install balcony screens, which can't be considered as modifying the facade, because balcony screens are only the owner's personal behavior and don't involve changes in the same part. Owners have the right to install balcony screens, but the property management company cannot interfere with their choice and force them not to install them. The owner shall ensure that the screens used meet the safety standards and will not pose a threat to the lives and property of others. If the property company violates the regulations or forces the owners not to install, the owners can defend their rights through arbitration, complaints and other means. , you can also complain to the housing and urban-rural construction department. This is the maintenance of the legitimate rights and interests of the owners. The property can't interfere with the owner's right to install balcony screens, but the owner had better communicate with the property before installation and get the consent to avoid unnecessary disputes later.