Disadvantages of Prefabricated Assembled Houses

The disadvantages of prefabricated assembled houses mainly include the following aspects:

1. High initial investment and transportation and lifting costs Prefabricated assembled houses require the production of prefabricated components in factories in advance, involving fixed costs such as mold development and equipment purchase, resulting in significantly higher initial investment than traditional buildings. Additionally, specialized vehicles are required for component transportation, and large lifting equipment is needed for lifting. Especially in remote areas or regions with inconvenient transportation, increased transportation distances and difficulties will further drive up costs.

2. Low design flexibility and difficulty in meeting diverse needs The standardized production mode of prefabricated components restricts the freedom of architectural design. For example, the sizes and shapes of components such as walls and floors need to be determined in advance, making it difficult to achieve complex shapes or personalized layouts. If design adjustments are required, new molds may need to be opened or components customized, increasing time and economic costs.

3. High requirements for node connections, affecting integrity and seismic resistance The connection nodes between components are crucial for structural safety. If there are defects in the connection process (such as loose bolts or poor welding), it may lead to a decrease in integrity and even trigger structural instability. Additionally, compared to traditional cast-in-place buildings, prefabricated assembled houses have weaker seismic performance, especially in earthquake-prone areas, where additional safety measures need to be strengthened.

4. Strict requirements for construction techniques and conditions During transportation, it is necessary to avoid component collisions or deformations, and the construction site needs to meet requirements for flatness and bearing capacity; otherwise, it may affect installation accuracy. At the same time, construction personnel need to undergo professional training and be familiar with the lifting sequence and connection techniques of components; otherwise, quality issues may arise due to improper operation.

5. Poor sound insulation and thermal insulation effects There are gaps at the joints of prefabricated components. If the sealing treatment is improper, air and sound can easily be conducted through the gaps, reducing sound insulation performance. Additionally, the thickness of thermal insulation materials in some components is limited, making it difficult to achieve the same thermal insulation effect as traditional buildings, especially in extreme climate regions, where居住 comfort (living comfort) may be affected.

6. Difficulty in adjusting internal structure and limited space customization The fixed nature of prefabricated components determines that the internal layout of the house is almost impossible to significantly modify. For example, the positions of load-bearing walls are fixed, making it difficult for residents to demolish or modify walls or adjust room functions according to their needs, limiting the long-term adaptability of living space.

7. Increased risk of water leakage over time Cement components may develop cracks due to thermal expansion and contraction or foundation settlement during long-term use, and the gaps between components may also expand due to aging of sealing materials, leading to rainwater infiltration into the interior and affecting building durability and user experience.

8. Short service life and prominent aging issues The design life of prefabricated assembled houses is typically 30 to 50 years. Some early buildings have approached or exceeded their service life, exhibiting aging phenomena such as component carbonization and steel bar corrosion. Regular inspection and maintenance are required; otherwise, the actual service life may be shortened.