Prefabricated Panel Houses in Residential Areas

Prefabricated panel houses are buildings constructed primarily using prefabricated panels, and their safety and handling methods need to be determined based on housing safety appraisal results.

Prefabricated panel houses are built using factory-made cement components (prefabricated panels). Due to the limitations of early construction conditions, they generally have issues such as weak earthquake resistance, poor sound and thermal insulation, and insufficient structural integrity. Over time, rainwater infiltration into panel joints can cause internal steel reinforcement corrosion, leading to ceiling cracks, water leakage, and other hazards. Combined with problems like aging water pipes and outdated electrical wiring, the living experience significantly declines. However, it is important to clarify that prefabricated panel houses are not necessarily dangerous buildings, and their safety needs to be evaluated through professional appraisals.

According to the national classification and handling policy of "retention, renovation, and demolition", housing safety appraisal results are divided into four grades, each corresponding to different handling methods:

• Grade A houses: The structure is intact with no dangerous components, and they are safe for occupancy. These houses are included in regular old residential area renovations, focusing on replacing aging water and electricity pipelines, repairing roof waterproofing, improving the environment, and adding elevators when conditions permit.
• Grade B houses: The main structure is stable, with only a few minor components having issues. Priority is given to local maintenance and upkeep, along with comprehensive improvements, allowing for safe occupancy without risk.
• Grade C houses: These are partially dangerous buildings where some load-bearing components have defects. Demolition is not required; instead, targeted structural reinforcement (such as repairing floor cracks and seismic strengthening) is used to eliminate hazards. The renovation funds are mainly borne by special funds for old residential area renovations, reducing the burden on residents.
• Grade D dangerous buildings: The entire load-bearing structure is severely damaged and has no reinforcement value. They need to be promptly demolished and rebuilt to ensure the safety of occupants.

Survey data shows that over 70% of prefabricated panel buildings are not classified as Grade D dangerous buildings after appraisal. They can continue to be used safely after repairs and reinforcement, with only a small percentage truly requiring demolition and reconstruction. Additionally, policies support the "self-initiated renewal and original-site reconstruction" of old housing, with some pilot projects allowing for an increase of about 30% in new floor plans or actual usable area after renovation, providing residents with a path to improve their living conditions.