Disadvantages of Prefabricated Houses

Prefabricated houses have the following disadvantages:

1. High Quality Risks If the construction process is not standardized, prefabricated houses have a 7% probability of experiencing foundation settlement or wall cracks within 5 years, with quality risks being more prominent when constructed in low-temperature environments. Some cases indicate that maintenance costs after 5 years may account for a quarter of the initial construction cost, significantly increasing long-term maintenance expenses.

2. Poor Sound Insulation and Waterproofing Performance The limited thickness of prefabricated panels results in poor sound insulation, with the water leakage rate at joints being nearly twice that of traditional buildings, necessitating regular leak-proofing treatments. Additionally, wall cracks and ceiling water leakage issues are more severe on the top floor, further affecting living comfort.

3. Reduced Cost Advantages Affected by fluctuations in the prices of raw materials such as cement, prefabricated houses are currently only about 5% cheaper than traditional buildings. If transported to remote areas, freight costs may account for 5% of the total cost, weakening their economic advantage.

4. Limited Design Flexibility Prefabricated houses are currently only suitable for buildings up to two stories high, with facades prone to 15%-20% color variations, requiring frequent maintenance to maintain appearance. Design limitations restrict their application scenarios and aesthetic appeal.

5. Insufficient Structural Strength and Earthquake Resistance Prefabricated panel houses are constructed from assembled panels, lacking overall solidity and toughness. The hollow design of prefabricated panels features less scientific reinforcement bar quantity and distribution compared to cast-in-place houses, making joints prone to loosening during earthquakes. Even slight vibrations can cause structural damage, with extremely poor earthquake resistance.

6. Short Service Life The design life of prefabricated houses is typically 20-30 years. Over time, issues such as wall cracks and water leakage frequently occur, with some old houses being classified as 'dangerous buildings.' Repairs are difficult and costly.

7. Poor Thermal Insulation Performance Gaps in walls and around doors and windows of prefabricated panel buildings easily lead to cold winters and hot summers: cold air infiltrates in winter, while indoor heat becomes stifling in summer, necessitating additional installation of thermal insulation materials or air conditioning equipment, further increasing usage costs.