Differences 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, planning change risks, price and cost, construction period, and applicable scenarios.

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 poured and completed on-site. The entire process involves setting up formwork, binding reinforcement, pouring concrete, and curing. In contrast, prefabricated houses are constructed using prefabricated components assembled on-site. These components are manufactured in factories and then transported to the site for assembly, such as prefabricated wall panels and stairs. On-site construction is more akin to 'building with blocks'.

House Status and Occupancy Time: Cast-in-place houses require time for concrete pouring and curing, which is relatively lengthy. However, once completed, they can be immediately decorated and occupied. Prefabricated houses have shorter on-site assembly times since components are prefabricated in factories. However, the overall occupancy time may not be significantly shorter than that of cast-in-place houses, as it still depends on the completion of assembly and subsequent decoration processes.

Seismic Performance: Cast-in-place houses are poured as a whole, resulting in good structural integrity and strong seismic resistance, fully complying with relevant standards. Prefabricated houses, due to the presence of connection nodes between components, have relatively weaker seismic performance and may be more susceptible to damage during earthquakes or other natural disasters.

Quality Risks: The quality of cast-in-place houses is influenced by the technical proficiency of the construction team and the quality of materials used. However, homebuyers can inspect the construction process on-site to have some control over quality. Quality risks for prefabricated houses include the impact of factory production control on the quality of prefabricated components and the need to pay attention to on-site assembly quality, such as the firmness of component connections.

Planning Change Risks: The risk of planning changes for cast-in-place houses is relatively low since the house is close to or already completed, making planning changes less likely. Prefabricated houses, similar to pre-sold houses, may face risks of changes in community planning or supporting facilities. Homebuyers need to pay attention to relevant planning information.

Price and Cost: Cast-in-place houses generally have higher prices due to additional costs associated with on-site pouring, such as formwork rental and labor expenses. The prices of prefabricated houses may be lower due to the industrial production of prefabricated components, but specific prices are still influenced by factors such as house quality and location.

Construction Period: The construction period for cast-in-place houses is relatively long, involving multiple processes. Prefabricated houses offer convenient and fast construction, allowing for a shorter construction period.

Applicable Scenarios: Cast-in-place houses are suitable for high-rise residential buildings, large-span spaces, and bathrooms, meeting the needs of complex structures. Prefabricated panels are suitable for temporary buildings or situations with extremely tight budgets. However, it is crucial to ensure proper joint waterproofing to prevent leakage issues.