The housing maintenance fund can be used for water leakage maintenance of the top floor of the house, because the housing maintenance fund is used for major and medium-sized repairs and renovation projects of the main structure, public parts and public facilities and equipment after the expiration of the housing warranty period, as follows:

1. The main load-bearing structure of the house includes foundation, internal and external load-bearing walls, columns, beams, floors and roofs.

2. Public parts refer to outdoor walls, hallways, stairwells, corridors, etc.

3. Public facilities and equipment refer to water supply and drainage pipelines and equipment, distribution cables and equipment, elevators, public lighting, fire-fighting facilities, green spaces, roads, ditches, non-operating parking garages, public sports facilities and other facilities and equipment used by the owners in the houses and related supporting areas.

In addition, the maintenance fund is managed by the Housing Authority, and the application process is complicated.