Latest Renovation of Prefabricated Panel Houses

The latest renovation plans for prefabricated panel houses mainly include the combination of prefabricated panels and cast-in-place belts, the renovation of old prefabricated panel buildings, specialized designs by integrated home decoration companies, and the application of new wall prefabricated panels. The appropriate plan should be selected based on the house structure, safety level, and functional requirements.

1. Combination Plan of Prefabricated Panels and Cast-in-Place Belts
This plan connects scattered prefabricated panels into a whole through cast-in-place concrete belts, enhancing structural earthquake resistance and crack prevention. Key Points:

• Material Selection: Prioritize the use of national standard qualified products such as prestressed hollow slabs, ensuring no cracks on the surface and small dimensional deviations.
• Position of Cast-in-Place Belts: They should be set directly above load-bearing walls and at the joints of prefabricated panels to avoid stress concentration leading to cracking.
• Construction Specifications: The width of cast-in-place belts is generally controlled between 15-20 centimeters, with a concrete strength of no less than C20. After pouring, sufficient curing is required to reduce shrinkage cracks. This plan is cost-effective and suitable for prefabricated panel houses with a basically intact structure but in need of enhanced integrity.

2. Renovation Policies and Techniques for Old Prefabricated Panel Buildings
In 2026, many places introduced renovation support policies, requiring differentiated measures based on the safety level of the houses:

• Grade D Dangerous Houses: Directly demolished and rebuilt to eliminate structural safety hazards.
• Grade C Dangerous Houses: Handled through repair and reinforcement (such as adding structural columns and ring beams), reconstruction (adjusting the layout), renovation (rebuilding on the original site), or original demolition and reconstruction. Key Steps: Before renovation, a professional institution should be commissioned to conduct a safety assessment, focusing on evaluating the bearing capacity of load-bearing components (such as beams, slabs, and columns), the carbonation depth of concrete, and the corrosion of steel bars. A targeted plan should be formulated in combination with the construction year (such as the issue of low design standards in houses built before 2000).

3. Specialized Techniques of Integrated Home Decoration Companies
Some home decoration companies have developed specialized techniques for prefabricated panel houses, such as Jiangcheng Decoration's "Prefabricated Panel Crack Prevention + Light Steel Structure Reinforcement System":

• Crack Prevention Technique: By treating the base layer (such as removing hollow layers), laying mesh cloth, and applying specialized anti-crack mortar, the wall repair rate is reduced by 79%.
• Light Steel Structure Reinforcement: Light steel keels are added at the junctions of walls and floor slabs to enhance local bearing capacity, suitable for families planning to renovate old public housing built before 2000. Such plans require selecting companies with experience in old house renovation to ensure construction techniques comply with regulations.

4. Application of New Wall Prefabricated Panels
New wall prefabricated panels that can be directly pasted have been introduced to the market, with advantages including:

• Convenient Construction: No cement mortar is required; they can be fixed by simply applying specialized glue, shortening the construction period.
• Excellent Performance: The material is waterproof, fire-resistant (Class A non-combustible), and corrosion-resistant, suitable for humid environments such as kitchens and bathrooms.
• Strong Decorative Effect: The surface can be made with textures such as imitation stone and wood grain, with perfect line connections, directly covering existing wall defects. However, attention should be paid to the flatness of the base layer; if the wall undulation exceeds 3mm, leveling should be done in advance.