Advantages and Disadvantages of Prefabricated Houses

The advantages of prefabricated houses include fast construction speed, lower cost, excellent environmental performance, stable quality, and good earthquake resistance; the disadvantages include poor integrity, short service life, easy leakage, poor thermal insulation, poor sound insulation, limited design flexibility, quality risks, and high costs for some types.

Advantages:

1. Fast Construction Speed: Components are prefabricated in the factory in advance, and on-site assembly is highly efficient, 60%-70% faster than traditional construction. For example, modular components can be shipped from the factory in 7 days, and the house frame can be erected within a few days.
2. Lower Cost: The cost of the main structure is about 30% lower than that of a brick house, saving an average family 40,000-50,000 yuan. There is less material waste, and the later maintenance cost is 40% lower than that of traditional houses. The cost of prefabricated slabs is about 60%-70% of that of cast-in-place slabs.
3. Outstanding Environmental Performance: The recycling rate of construction waste reaches 40%, and carbon emissions are reduced by 50%. Some projects have obtained international environmental certifications.
4. Stable Quality: Standardized factory production ensures uniform strength grades of components. Local damage can be replaced individually, making maintenance convenient.
5. Good Earthquake Resistance: Lightweight materials are used, and the structural self-weight is 20%-30% lighter than that of brick-concrete structures, with strong resistance to deformation, suitable for earthquake-prone areas.

Disadvantages:

1. Poor Integrity and Earthquake Resistance: The splicing of prefabricated slabs results in poor structural firmness. Slight vibrations may loosen the joints, and earthquakes can easily cause dislocation or collapse.
2. Short Service Life: Wall cracks and ceiling leakage may occur within 30 years. Old prefabricated houses are often identified as dangerous buildings, with high repair costs.
3. High Leakage Risk: The leakage rate of exterior wall panel seams is nearly twice that of traditional buildings, requiring regular leakage prevention treatment.
4. Poor Thermal Insulation: The thermal insulation performance of wall materials is insufficient, resulting in cold winters and hot summers, and low comfort in extreme weather.
5. Poor Sound Insulation: The thickness of prefabricated slabs is limited, resulting in poor sound insulation performance and affecting living privacy.
6. Low Design Flexibility: The architectural appearance is单一 (monotonous), with a prominent contradiction between standardization and diversification. Currently, it is only suitable for buildings up to three stories. The color difference of the exterior facade may reach 15%-20% after 5 years, requiring frequent maintenance.
7. Quality Risks: When construction is not standardized, the probability of foundation settlement or wall cracks within 5 years can reach 7%. Problems are more prominent in low-temperature construction environments, and later maintenance costs may account for 25% of the construction cost.
8. High Cost for Some Types: Panel assembly-type buildings use a large amount of steel, with construction costs 10%-15% higher than those of brick-concrete structures.