Does the House Have a Prefabricated Panel Structure?

Houses do have prefabricated panel structures, but they are mainly found in old houses built before 2003. After 2003, the state prohibited the use of prefabricated panel structures in newly built commercial housing. The following provides an explanation from four aspects: definition, historical background, existing problems, and policy handling:

Definition and Construction Method of Prefabricated Panel Structures

Prefabricated panel houses are structures built primarily with prefabricated panels, with the core components being factory-made cement panels. These cement panels are produced using standardized molds and are transported to the construction site for direct assembly, forming structural parts such as floor slabs and walls. This construction method offered advantages such as fast construction speed and lower costs during the early stages of industrialization and was widely used in residential construction.

Historical Background and Scope of Use

Before 2003, residential construction technology in China was relatively limited. Prefabricated panel structures became the mainstream construction method for old residential areas and some unit dormitories due to their high construction efficiency and easy access to materials. For example, in brick-and-mortar houses built from the 1980s to the 1990s, the usage rate of prefabricated panel floor slabs exceeded 80%. However, since 2003, the state has introduced policies explicitly prohibiting the use of prefabricated panel structures in newly built commercial housing and promoting the use of more integrated construction techniques such as cast-in-place concrete to enhance the safety and durability of houses.

Problems with Existing Prefabricated Panel Houses

Existing prefabricated panel houses, due to their long construction age, generally have three major defects:

1. Weak Earthquake Resistance: Prefabricated panels are assembled by splicing, and the joint connection strength is lower than that of cast-in-place structures. Under earthquake action, they are prone to dislocation or detachment, leading to a decrease in the overall stability of the house.
2. Poor Sound Insulation and Thermal Insulation: Prefabricated panels have limited thickness and no internal insulation layer, making it difficult to effectively block sound and heat transfer, resulting in lower living comfort.
3. Limited Service Life: Cement components are prone to cracking, carbonization, and other problems after long-term environmental erosion, and maintenance costs increase significantly with the age of the house.

Policy Handling Methods

In response to prefabricated panel houses, the renovation policy implemented since 2022 adopts the principle of "renovation first, demolition second":

• For houses with structural safety and basic functional requirements met, performance is improved through methods such as reinforcing floor slabs, adding insulation layers, and renovating pipelines.
• Only prefabricated panel houses identified as dangerous buildings by professional assessments (such as those with serious cracks or tilting) are demolished and prioritized for inclusion in affordable housing construction plans.

This policy takes into account the actual conditions of old houses and avoids resource waste caused by large-scale demolition, reflecting a balance between scientific renovation and livelihood protection.