Is Renovation of Prefabricated Panel Houses Useful?

Whether the renovation of prefabricated panel houses is useful depends on the situation and cannot be generalized.

For ordinary old buildings with intact main structures and no safety hazards, conventional renovation is a “value-added project” with significant advantages. This type of renovation mainly focuses on optimizing the building's supporting facilities and external environment. For example, exterior wall painting can improve the building's appearance, sewer pipe renovation can solve drainage issues, elevator installation facilitates residents' travel, parking space planning alleviates parking difficulties, and the construction of leisure footpaths enhances the quality of the community environment. Such renovations have short construction periods, low costs, and wide coverage. They can transform the appearance of the community in a short time, significantly improving living comfort and serving as a practical livelihood project.

For prefabricated panel residential buildings constructed in large numbers from the 1970s to the 1990s, conventional renovation is “not the right solution”. These buildings are constructed by assembling factory-prefabricated hollow floor panels on-site, with only simple mortar filling between the panels and no overall steel frame connection, resulting in poor integrity. Moreover, there were gaps between the construction standards and requirements of that time and those of today. After three to four decades of exposure to the elements and load-bearing wear and tear, many of the problems are structural. For example, the seismic resistance of most old prefabricated panel buildings does not meet the current minimum standards; the steel bars inside the floor panels have rusted due to long-term moisture exposure, causing the concrete to crack and peel over large areas after expansion; in many communities with buildings over 40 years old, uneven foundation settlement has occurred, resulting in through-cracks in the walls and beams. These problems are hidden within the walls and floor panels and cannot be addressed by conventional renovations such as wall painting and crack filling, which can only solve aesthetic issues but not safety concerns, making them “ineffective renovations” in the eyes of residents.

However, 30-year-old prefabricated panel houses in rural areas can be fully renovated, but it is essential to focus on addressing three core issues: structural safety, waterproofing and moisture resistance, and electrical circuit aging. The renovation cost is approximately 800 - 1200 yuan per square meter, which is 40% cheaper than demolition and reconstruction. Priority should be given to addressing structural safety issues, followed by functional and aesthetic improvements.