The upper-level owner should not go to any department to deal with the explosive screws on the ground and the object-finding pipe at the bottom of the platform.

The property company should come forward to coordinate, otherwise the owner can find out the reason of floor perforation by himself, that is, ask the developer to compensate the construction quality problem.

According to the Measures for Quality Management of Construction Projects and the Measures for Quality Assurance of Construction Projects, the average thickness of cast-in-place reinforced concrete floor is about 12cm, and the positive and negative error is 3 cm, that is, the thinnest floor should be 9 cm. If the floor thickness of the perforated floor upstairs does not reach 9 cm, it can be considered as a construction quality problem. The downstairs owner can claim directly from the developer, and the upstairs owner can also claim from the developer.

If the floor thickness reaches the standard, the upstairs owner or the upstairs decoration construction unit shall compensate the downstairs owner for the loss. As a professional property management unit, a property company is irresponsible if it is uncoordinated or does not act. Owners can complain to the local real estate authorities, request to correct the inaction of the property company and record the dishonest records of the property company.