Prefabricated House Renovation

The renovation of prefabricated houses should take into account the characteristics of modular construction, considering aspects such as design precision, material selection, construction standards, and environmental control.

1. Core Characteristics of Modular Construction Renovation
The ceilings, walls, waterproof layers, and other components of prefabricated houses (modular buildings) are all manufactured in factories and assembled on-site in a “building block” manner. This construction method demands extremely high design precision, with the position of each steel bar requiring millimeter-level error control to ensure structural stability and satisfactory renovation quality after assembly. For example, a public housing project in Shenzhen, Guangdong, utilized 6,028 concrete modules to construct a residential building nearly 100 meters tall. The 70-square-meter units were assembled from two half-modules, with most processes completed in the factory and only minor on-site casting for connections, significantly reducing on-site construction errors.

2. Advantages of Prefabricated Composite Slabs
Composite slabs, composed of non-removable formwork and steel bar trusses, offer good integrity, strong earthquake resistance, and a flat surface. Their continuity effectively enhances the building's seismic performance while reducing formwork usage and lowering construction costs. During the renovation phase, the flat surface allows direct application of finishing layers (such as tiling or painting) without additional leveling, improving construction efficiency.

3. Construction Safety and Hidden Work Inspection
The installation process for prefabricated components is complex and requires strict adherence to safety regulations. For instance, before casting concrete prefabricated components, a hidden work inspection must be conducted, focusing on verifying the grade, specifications, quantity, position, and spacing of steel bars, as well as the connection methods (such as welding or mechanical connections) and joint positions of longitudinal load-bearing steel bars. These details directly impact structural safety, and inadequate inspection can lead to issues like excessive joint gaps or wall cracking.

4. Environmental and Nuisance Control
The factory-based production model of modular construction significantly reduces on-site noise and dust pollution. Taking the Shenzhen public housing project as an example, with over 80% of construction processes completed in the factory, only module assembly and minor on-site casting were needed on-site, shortening the construction period by more than 30% and greatly reducing environmental disturbance, providing cleaner working conditions for renovation.

Summary: The renovation of prefabricated houses should fully leverage the precision advantages of factory-based production, incorporate new materials like composite slabs, strictly control construction safety and hidden work, and utilize the environmental and efficiency benefits of modular construction to achieve high-quality, low-disturbance renovation goals.