The roof of commercial housing leaks, how to share the maintenance cost of the roof?

The Measures for the Administration of Residential Special Maintenance Funds stipulates that the part that needs to be maintained by maintenance funds is the residential part. According to laws, regulations and house sales contracts, some parts are shared by owners in a single house or by non-residential owners connected with structures in a single house, generally including: residential foundation, load-bearing walls, columns, beams, floors, roofs and outdoor walls, hallways, stairwells and corridors.

Twentieth residential parts, facilities and equipment maintenance and renovation costs, in accordance with the following provisions:

(1) The maintenance, renewal and renovation costs of * * * parts and * * * facilities and equipment between commercial houses or between commercial houses and non-residential houses shall be shared by the relevant owners in proportion to the construction area of their respective properties.

According to the above provisions: as long as * * * shares the cost with the owner who uses the roof in proportion.