Solutions for Existing Prefabricated Panel Houses

The handling of existing prefabricated panel houses in 2026 requires a comprehensive assessment based on the safety status of the house, renovation value, and residents' conditions, with measures such as inspections, repairs, reinforcements, renovations, original demolition and reconstruction, or demolition being taken, as detailed below:

1. Routine Maintenance and Partial Repairs
If the structural condition of the house is good and only local issues such as roof leaks, exterior wall peeling, corridor damage, blocked plumbing, or aging electrical wires exist, targeted repairs can be carried out on the roof, exterior walls, corridors, drainage, water supply, gas, heating, and fire protection systems. For example, replacing aging electrical wires, repairing waterproof layers, and reinforcing exterior wall insulation layers can restore the basic functionality of the house and extend its service life. These measures are cost-effective and suitable for houses without structural safety hazards.

2. Renovation or Demolition and Reconstruction

• Renovation: For houses with undamaged main structures but aging or functional defects, living quality can be improved by updating pipelines, reinforcing non-load-bearing components, and optimizing spatial layouts. For example, transforming kitchens and bathrooms into modern moisture-proof designs or adding elevators to improve barrier-free access.
• Demolition and Reconstruction: If the main structure of the house is severely damaged (e.g., excessive cracks in prefabricated panels, tilting of load-bearing walls) or cannot be repaired through reinforcement as determined by professional assessment, it needs to be demolished and rebuilt according to current seismic standards. These measures are more costly but can completely eliminate safety hazards.

3. Priority for Demolition
The following three types of houses are usually prioritized for demolition:

• Irreversible damage to the main structure: Even reinforcement cannot meet safety requirements for use;
• Insufficient disaster resistance: Unable to withstand disasters such as earthquakes and floods (e.g., prefabricated panel houses without seismic structural columns);
• Municipal planning land: Houses whose land is required for urban roads or public facility construction.
  Demolition compensation is usually implemented based on the house area, condition, and local policies, with residents having the option of monetary compensation or property exchange.

4. Reinforcement Techniques
Select targeted reinforcement plans based on the damaged parts:

• Foundation reinforcement: Increase the bearing capacity by expanding the foundation base area, deepening pile foundations, or injecting chemical reinforcing agents;
• Structural reinforcement: Enhance overall strength by adding steel beams, steel plates, or injecting reinforced concrete to walls, stairs, and other parts;
• Seismic isolation reinforcement: Install spring/rubber seismic isolators between the foundation and floor slabs to reduce the transmission of seismic energy;
• Floor slab reinforcement: Increase the bearing capacity by adding a reinforced concrete layer (thickness ≥ 40mm) to the surface, adhering carbon fiber sheets, or steel plates.
  Reinforcement must be designed and constructed by professional institutions and comply with standards such as the 'Building Seismic Appraisal Standard'.