Is a Prefabricated Concrete House Good?

Prefabricated concrete houses have both advantages and disadvantages, and whether they are good depends on specific needs and conditions.

Advantages

• Low cost: As industrial products, prefabricated panels can be mass-produced, reducing costs. The main structure is about 30% cheaper than a brick house, saving ordinary families between 20,000 and 50,000 yuan. Unified factory production results in less material waste, and post-construction maintenance costs are 40% lower than those of traditional houses. Additionally, 40% of construction waste can be recycled, and carbon emissions are directly halved.
• Easy installation: The factory pre-makes the concrete panels, which are then transported to the site and assembled like building blocks. Flat modules can be produced within 7 days, and the skeleton of a flat house can be erected in just a few days, which is 60-70% faster than traditional construction, making it suitable for those in a hurry to move in. Moreover, no on-site fabrication is required, making it suitable for ordinary people without professional construction skills.
• Good earthquake resistance: Factory prefabrication ensures an error of no more than 1 millimeter. The houses can withstand a magnitude 9 earthquake in seismic tests and have less overall settlement than ordinary houses.
• Short construction period: Compared to traditional buildings, the construction period for prefabricated concrete houses can be shortened by more than half.

Disadvantages

• Safety hazards: Even minor earthquakes can cause house collapse. The quality of prefabricated concrete panels on the market varies greatly, with many inferior products having a short service life and being prone to collapse accidents. Improper installation or inaccurate calculations can lead to uneven structural stress and collapse risks.
• Poor sound insulation: Prefabricated panels are typically about 10 centimeters thick with long circular holes in the middle, acting as natural sound conductors. Their sound insulation ability is poor, and since the interior may be hollow, the sound insulation effect is generally not good.
• Prone to leakage: Composed of independent panels with fine gaps between them, rainwater can easily seep into the interior during the rainy season, corroding steel bars. The probability of roof leakage on the top floor is 30% higher than that of a brick house, and the water seepage rate at joints is nearly twice that of traditional buildings, requiring regular leak-proofing treatments.
• Quality risks: If construction is not standardized, there is a 7% probability of foundation settlement or wall cracks within 5 years. Construction in low-temperature environments is more prone to problems, and maintenance costs after 5 years may account for a quarter of the original construction cost. Some manufacturers cut costs by using substandard materials, resulting in non-compliant prefabricated panels.
• Other issues: After the price of cement rises, prefabricated houses are only 5% cheaper than traditional buildings, and transportation costs to remote areas can account for 5% of the total cost. Currently, they can only be built up to two stories. The exterior facade is prone to color differences, with 15-20% color differences possible after 5 years, requiring frequent maintenance. Poor thermal insulation results in air conditioning electricity costs being 20-30% higher, and although the design life is 60 years, major repairs are often needed after about 40 years.