The Difference Between Cast-in-Place and Prefabricated Houses

The main differences between cast-in-place and prefabricated houses are reflected in aspects such as definition and construction methods, house status, seismic performance, quality risks, costs and construction periods, applicable scenarios, purchasing risks, and transaction processes.

Definition and Construction Methods: Cast-in-place houses are buildings where concrete is poured directly on the construction site. Structural elements such as beams, slabs, and columns are all cast in place, resulting in strong overall integrity. Prefabricated houses, on the other hand, are constructed using prefabricated components assembled on-site. These components are manufactured in factories and then transported to the site for assembly, making the construction process more modular.

House Status and Move-in Time: Cast-in-place houses require time for concrete pouring and curing processes, which can be relatively lengthy. However, once completed, they can be immediately decorated and occupied. Prefabricated houses have shorter on-site assembly times since the components are prefabricated in factories. Nevertheless, the overall move-in time still depends on the completion of assembly and subsequent decoration work, and the actual difference in move-in time needs to be evaluated based on specific construction progress.

Seismic Performance: Cast-in-place houses are poured as a whole, with strong structural continuity, and their seismic performance fully meets standards. Prefabricated houses have weaker overall integrity due to the presence of joints between components, resulting in relatively poorer seismic performance. Special designs, such as strengthening connection nodes, are required to enhance their seismic capacity.

Quality Risks: The quality of cast-in-place houses is influenced by the technical proficiency of the construction team and the quality of materials. However, homebuyers can inspect the construction on-site, making the risks relatively controllable. The quality risks of prefabricated houses are affected by factory production control, and attention must also be paid to on-site assembly quality, such as the precision of component splicing. It is essential to choose reputable manufacturers and construction parties.

Costs and Construction Periods: Cast-in-place houses have relatively long construction periods and higher labor and material costs. Prefabricated houses, with their industrialized production of components, offer convenient and fast construction. Prices may decrease due to large-scale production, but specific prices are still influenced by factors such as house quality and location.

Applicable Scenarios: Cast-in-place houses are suitable for high-rise residential buildings, large-span spaces, and areas such as bathrooms that require high waterproofing and structural integrity. Prefabricated houses are suitable for temporary buildings or situations with extremely tight budgets. However, proper joint waterproofing must be done to prevent leakage issues.

Purchasing Risks: Cast-in-place houses have relatively low risks of planning changes since the construction is close to or already completed, reducing the likelihood of planning modifications. Prefabricated houses may face risks of changes in community planning or supporting facilities, and relevant clauses should be clearly specified in the contract.

Transaction Processes: Cast-in-place houses are usually sold as existing homes, with a relatively simple transaction process. After signing the contract, ownership transfer can be completed relatively quickly. If prefabricated houses are sold as pre-sale homes, transactions can only occur after the house is assembled and the property certificate is obtained. If sold as existing homes, the transaction process is similar to that of cast-in-place houses.