Defects of Assembly Prefab Houses

The defects of assembly prefab houses (such as prefab panel houses) are mainly reflected in aspects such as service life, seismic performance, sound insulation and thermal insulation, structural adjustment, water leakage risk, and living comfort, as detailed below:

1. Short Service Life
The designed service life of assembly prefab houses is generally 30-50 years. Due to limitations in early construction techniques and material quality, the main structure of the house is prone to issues such as cracking, deformation, or water leakage as it ages. For example, cement components may undergo carbonation under long-term environmental erosion, leading to a decrease in strength. Electrical wiring and plumbing systems are also at risk of short circuits or leaks due to material aging, requiring frequent maintenance or even early replacement.

2. Poor Seismic Performance
These houses rely heavily on the splicing of cement components, with insufficient reinforcement by steel bars in the overall structure, resulting in low structural strength. In natural disasters such as earthquakes, the connection points are prone to fracture due to stress concentration, potentially leading to the complete collapse or severe damage of the house. In contrast, modern seismic-resistant buildings are designed with reinforced concrete frames or shear walls to more effectively disperse seismic energy.

3. Inadequate Sound Insulation and Thermal Insulation
The splicing method of prefabricated components results in gaps in walls and floors, leading to insufficient sound insulation. Daily activities of neighbors, such as footsteps and conversations, can easily penetrate the walls, affecting privacy and quality of life. Meanwhile, the limited thickness of thermal insulation materials or their loose filling means that indoor heat is lost quickly in winter and it is difficult to block external high temperatures in summer, increasing energy consumption.

4. Difficulty in Adjusting Internal Structure
Unlike the flexible layouts of modern commercial housing, the load-bearing walls and pipelines in prefab houses are mostly fixed, making large-scale demolition and modification almost impossible. Residents who need to adjust the spatial functions, such as merging rooms or relocating the kitchen, may be restricted due to the potential damage to structural stability, making it difficult to meet personalized living needs.

5. High Risk of Water Leakage
Cement components are prone to cracking over time, and the gaps between components expand further due to thermal expansion and contraction or foundation settlement, leading to water leakage from the joints of floors and walls due to rainwater or domestic water. Leakage from upper floors may affect lower-floor residents, and repairs require damaging the original structure, resulting in high costs and long cycles.

6. Low Living Comfort
Standardized design results in monotonous house exteriors, small internal spaces, and户型 (floor plans) that lack humanized considerations. For example, kitchens and bathrooms may suffer from poor ventilation due to the lack of windows, leading to the growth of odors. Living rooms may have insufficient natural light, requiring long-term reliance on artificial lighting, affecting the living experience. Additionally, the repeated use of prefabricated components makes the overall appearance of the community uniform and lacking in diversity.