Prefabricated houses, also known as modular or factory-built houses, are constructed by manufacturing building components in a factory and then transporting them to the construction site for assembly. Compared to traditional cast-in-place concrete construction, prefabricated houses significantly shorten the construction period. This construction method benefits from several key factors:
1. Factory Production and Standardized Operations
The core of prefabricated houses is “prefabrication,” meaning building components are produced in a factory according to uniform standards. Factory production has the following advantages:
Standardized operations: The factory uses assembly line production, with clear operational procedures and standards at each stage, reducing uncertainties during construction. Workers perform repetitive tasks at fixed workstations, improving proficiency and greatly increasing production efficiency.
High mechanization: The factory is equipped with advanced machinery such as automated cutting machines and welding robots, enabling fast and precise component production while minimizing errors and inefficiencies caused by manual labor.
Controlled environment: Factory production is unaffected by weather or temperature, allowing continuous and stable manufacturing around the clock.
2. Parallel Construction, Shortened Schedule
Traditional construction usually follows a linear process—foundation, main structure, interior finishing—in sequence, where each stage must wait for the previous one to finish. Prefabricated house construction adopts a parallel process:
Factory and site work simultaneously: While components are manufactured in the factory, the construction site can prepare the foundation and groundwork. Once components arrive, they are assembled directly, greatly shortening the overall timeline.
Modular assembly: Prefabricated houses use modular design, with most interior finishing and equipment installation done in the factory. On-site work involves simply connecting modules, significantly reducing on-site construction time.

3. Reduced On-site Construction Steps
Traditional construction involves many wet processes on-site, such as concrete pouring and wall masonry, which are time-consuming and affected by weather and material supply. Prefabricated house construction significantly reduces these on-site steps:
Direct installation of prefabricated components: Walls, floors, roofs, and other parts are pre-made in the factory; on-site work mainly involves lifting and fixing, eliminating curing time for cast-in-place concrete.
Dry work predominates: Construction primarily uses dry methods such as bolting and welding, reducing wet work like cement and mortar, thus avoiding delays caused by moisture-related work.
4. Quality Control and Improved Construction Efficiency
Factory production of prefabricated houses not only improves efficiency but also significantly enhances building quality:
Strict quality control: The stable factory environment allows rigorous quality checks at every production stage, ensuring precision and strength of components. In contrast, quality control on traditional construction sites is more difficult and prone to errors.
Reduced rework: Since most processing and inspection occur in the factory, the likelihood of on-site assembly issues is greatly reduced, minimizing rework and construction delays due to quality problems.
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