How to Build Prefabricated Houses

The construction process of prefabricated houses typically includes six core steps: modular prefabrication, foundation treatment, module transportation and assembly, parallel operations and precision control, on-site connection and reinforcement, and auxiliary facility installation.

1. Modular Prefabrication
The core of prefabricated houses lies in breaking down the building into independent modules and completing standardized production in a factory. Structural components such as ceilings, floors, and walls, as well as water and electricity pipelines and bathroom waterproof layers, are all prefabricated through an assembly line. For example, wall modules may integrate insulation layers and pipeline pre-embedded slots to ensure functional and structural integration. The controlled factory environment avoids weather interference in traditional construction, enhancing component precision and quality stability.

2. Foundation Treatment
The construction site requires leveling the foundation and pouring a concrete垫层 (sub-base). Some cases adopt innovative techniques, such as laying white plastic sheets instead of steel bars to enhance strength and durability by reducing concrete moisture loss. Foundation design must be adjusted according to module weight and structural characteristics. For example, mobile cranes are used to install foundation piles weighing approximately 5 tons to ensure adequate load-bearing capacity.

3. Module Transportation and Assembly
After being transported to the site using specialized vehicles, prefabricated modules are quickly assembled using equipment like cranes. Beam connections employ mortise-and-tenon joints or nut fixation, while components like stairs are hoisted into place like building blocks. After floor slab installation, grouting is performed on module gaps to eliminate structural gaps and enhance overall integrity.

4. Parallel Operations and Precision Control
Factories utilize automated production lines and intelligent management to achieve parallel operations across multiple processes. For example, while producing wall modules, water and electricity pipeline pre-embedding can be completed simultaneously. Each module is labeled with project name, model, production date, and other information, with steel bar errors controlled to the millimeter level using laser positioning technology to ensure assembly precision.

5. On-Site Connection and Reinforcement
After module assembly, key nodes are connected using cast-in-place concrete or bolt fixation to achieve overall assembly. Sealing is a critical step, requiring caulking and drainage trough installation at joints to prevent rainwater leakage. For example, guide troughs must be installed at the connection between roof modules and walls to ensure smooth drainage.

6. Auxiliary Facility Installation
The final stage involves detailing work such as wire fixation, glass wool insulation layer installation, and roof tile placement. Wires are typically secured using clips in pre-embedded wall slots, while glass wool is filled in wall cavities to enhance thermal insulation. After final inspection and approval, the prefabricated house forms a complete living space.