Is it legal for the property not to seal the balcony?

The closed balcony has no legal jurisdiction, so it is not illegal. If it is a frameless balcony, as long as it is not open to the public, there is no problem. The property is not allowed to close the balcony mainly for the beauty of the house and the safety of the owner (after all, there is no policy to manage the balcony closure). Generally speaking, the closed balconies in residential areas are all made of property, and any color of aluminum can be used. In addition, you need the license of the decoration company or something to register the property. After all, there are still some irresponsible companies whose quality is not up to standard. Closed balcony, the thickness of frame glass must be 5MM, and the thickness of aluminum should reach1.2 mm; ; Borderless must reach 8MM, aluminum thickness should reach 3 mm ... and it must be tempered glass (tempered glass has CCC mark, that is, national compulsory certification). To meet this requirement, even if the property management, it will be easy to talk. Terraces, also known as balconies and balconies, are platforms that protrude from the external walls of buildings and are supported by columns or supports. The railing is built on its edge to prevent objects and people from falling off the platform, which is an extension of the building.