Maintenance of Prefabricated Panel Houses

If properly maintained, prefabricated panel houses can have a lifespan far exceeding the designed 50-year service life, with some houses built in the 1970s and 1980s still being safe to inhabit today. The core of maintenance lies in controlling environmental erosion, regulating construction practices, avoiding external damage, and conducting regular structural safety inspections. Specific maintenance points are as follows:

1. Waterproofing repair is crucial, especially in humid environments
In humid southern regions, high air humidity allows moisture to seep through wall cracks into the interior, causing steel reinforcement to rust and expand, further exacerbating crack propagation. In such areas, it is essential to focus on the integrity of the waterproofing layers on roofs, exterior walls, and bathrooms, which are prone to water infiltration. It is recommended to conduct a comprehensive inspection and repair of the waterproofing layers every 5-8 years. If water stains, mold, or paint peeling are found on the walls, the source of the leakage must be immediately identified and repaired to prevent steel reinforcement from being exposed to a humid environment.

2. Strictly prohibit damage to load-bearing structures and avoid external damage
The load-bearing system of prefabricated panel houses relies on the协同作用 (synergistic effect) of prefabricated panels and load-bearing walls. Any actions such as wall demolition, hole drilling, or additional construction can potentially compromise the structural integrity. For example, removing a load-bearing wall will directly cause the floor slab to lose support, leading to a risk of partial collapse; concentrating heavy objects (such as large fish tanks or stone furniture) on the floor slab can also cause cracks in the prefabricated panels. During daily use, avoid violent impacts on the walls and inspect the structural damage promptly after earthquakes.

3. Regular structural inspections and compliant renovations
According to policy requirements, starting from 2026, prefabricated panel buildings over 25 years old will be required to undergo mandatory housing inspections, focusing on detecting joint conditions of prefabricated panels, cracks in load-bearing walls, the degree of steel reinforcement corrosion, and foundation settlement. If the inspection indicates that the structure is safe but there are aging issues (such as aging pipelines or lack of elevators), renovations such as elevator installation and replacement of water and electricity pipelines can be carried out to improve living quality. Renovations must be designed and constructed by professional institutions to ensure compliance with current seismic and fire protection regulations.

4. Long-term maintenance case references
Some prefabricated panel houses built in the 1970s and 1980s remain in good condition today because the occupants have not made unauthorized structural modifications and have conducted regular waterproofing maintenance. The common characteristics of these houses are intact roof waterproofing layers, no cracks in the walls, no significant deformation of the floor slabs, and no exposure to extreme external forces such as earthquakes. Their maintenance experience shows that "minor repairs and maintenance" preventive maintenance is more effective than major repairs after the fact, significantly extending the lifespan of the house.