Disadvantages of Prefabricated Houses
Prefabricated houses have the following disadvantages:
Insufficient Seismic Performance: Prefabricated houses have poor integrity and mainly rely on cement construction. Although a certain amount of steel bars are added, their overall seismic capacity is far inferior to that of modern buildings. When facing natural disasters such as earthquakes or floods, safety precautions are significantly inadequate. During an earthquake, the floor slabs and walls are prone to instant separation and sudden collapse, without crack warnings or deformation buffers, posing a serious threat to the lives of occupants.
Poor Sound Insulation and Thermal Insulation: Prefabricated houses perform poorly in terms of thermal and sound insulation. In summer, the interior of the house can easily become unbearably hot; in winter, it can be bitterly cold. Additionally, due to poor sound insulation, residents can clearly hear their neighbors' voices, seriously affecting their quality of life.
Difficulty in Adjusting Internal Structure: Unlike modern commercial housing, prefabricated houses almost do not allow for large-scale modifications. Every wall may be related to the overall structure, making it difficult for residents to customize their living space according to personal needs, limiting the flexibility and comfort of living.
Risk of Water Seepage: Over time, cement components may develop cracks, and the gaps between components may increase, increasing the risk of water seepage between floors. If the joints are not properly treated, both the roof and walls may experience water seepage problems, affecting the service life and living experience of the house.
Short Service Life: The design life of prefabricated houses is approximately 30 to 50 years. Many prefabricated houses built in the 1970s to 1990s have approached or exceeded their intended service life and are showing signs of aging. The actual service life may be even shorter, possibly only 20 or 30 years before they become dilapidated. Many older prefabricated houses have been identified as 'dangerous buildings', with high repair costs and difficulty.
Low Structural Strength, Fragile Connection Points, and Substandard Materials: Prefabricated houses are assembled from individual prefabricated panels, inherently lacking in robustness and toughness. They often adopt a hollow design, with the quantity and distribution of steel bars inside being less scientific and reasonable than those in cast-in-place houses. The connection between prefabricated panels and walls is simple, and the panels are only simply filled between each other without a rigid framework. In terms of materials, they are brittle and prone to fracture, with instances of shoddy workmanship further weakening the structural strength of the house.
