Renovation Plan for Prefabricated Panel Houses

The renovation plan for prefabricated panel houses should be systematically advanced from four aspects: safety assessment, plan formulation, implementation supervision, and financial support:

1. Safety Assessment and Categorized Handling Before renovation, local governments should organize professional institutions to conduct a comprehensive safety assessment of prefabricated panel houses and classify the risk levels according to the 'Standards for the Assessment of Dangerous Buildings'. Severely dangerous houses (such as Grade D dilapidated houses) must have residents evacuated immediately and be demolished within a specified time limit to avoid the risk of collapse; generally dangerous houses can be selected for reinforcement or demolition based on specific conditions such as cracks and foundation settlement. For example, when the width of wall cracks exceeds 5mm or the uneven foundation settlement reaches more than 10mm, reinforcement should be prioritized.

2. Renovation Plan Formulation Based on the assessment results and urban planning, differentiated renovation strategies should be formulated:

• Reinforcement and Maintenance: For structural damage, targeted measures should be taken. When wall cracks are small (≤3mm), epoxy resin grouting can be used for repair; for severe cracks, steel plates or carbon fiber sheets should be added for reinforcement. For roof leakage, the original waterproof layer should be removed and SBS modified asphalt membrane should be laid again; for unstable foundations, static pile or root pile reinforcement should be carried out.
• Functional Enhancement: Solve living pain points. Poor sound insulation can be improved by adding 50mm thick soundproof cotton to the walls and replacing single-glazed windows with double-glazed ones; cramped spaces can be addressed by removing non-load-bearing walls to optimize the interior layout; multi-story residential buildings without elevators can have external elevators installed, which should meet the requirements of the 'Technical Standards for the Installation of Elevators in Existing Residential Buildings'.

3. Implementation and Supervision The renovation should be coordinated by the government, with the housing and construction department taking the lead in coordinating with planning, fire protection, and other departments to provide technical guidance. Before construction, the plan should be publicized and residents' opinions should be solicited. During construction, safety barriers should be set up and structural deformation should be monitored to ensure safety. After the renovation is completed, a third-party institution should conduct quality acceptance, focusing on checking indicators such as the load-bearing capacity of reinforced parts and the closed-water test of the waterproof layer. The house can be delivered for use only after passing the acceptance.

4. Financial Support The sources of funds are diversified: The government should set up special funds and support them through financial allocations and the issuance of local government bonds; residents should share part of the costs according to the renovation area, and the government should provide low-interest loans (annual interest rate ≤ 3%) or loan interest subsidies (up to 50% subsidy); social capital can participate through the PPP model and be responsible for the operation and maintenance after the renovation to obtain long-term benefits. For example, a certain city provides residents with a 30% financial subsidy for the renovation of prefabricated panel houses, and the remaining part can apply for a 10-year low-interest loan.