Drawbacks of Prefabricated Panel Houses

The drawbacks of prefabricated panel houses mainly include the following aspects:

1. Low structural strength and poor seismic performance
Prefabricated panel houses are constructed by assembling prefabricated concrete panels, resulting in a lack of overall integrity and toughness in their structure. The panels often feature a hollow design, with the quantity and distribution of internal steel bars being less scientific and reasonable compared to cast-in-place concrete, leading to extremely weak seismic resistance. Under earthquake or slight vibrations, the joints between floor panels are prone to loosening, and over time, cracks will gradually expand, even posing a risk of the entire building collapsing. This structural characteristic makes them a serious safety hazard in areas prone to geological disasters.

2. Short service life and high maintenance costs
The design life of prefabricated panel houses is typically shorter than that of cast-in-place buildings. While a general concrete building may have a lifespan of about 70 years, a prefabricated panel house may only last 30-50 years. As time passes, material aging leads to frequent structural issues, and many old prefabricated panel houses are identified as 'dangerous buildings'. Repairing them requires replacing the entire floor panels or reinforcing the walls, which is costly and technically challenging. Some houses may even face demolition due to irreparability.

3. Prominent issues of wall cracks and leakage
Cracks easily form at the joints of prefabricated panels due to settlement or temperature changes, spreading like a spider web across the walls, weakening structural strength and increasing the risk of collapse. Roof leakage is particularly severe, with indoor water accumulation forming a 'water dungeon' during rainy days. The long-term damp environment breeds mold and bacteria, posing health risks to occupants. Additionally, leakage accelerates steel bar corrosion, further shortening the building's lifespan.

4. Poor thermal insulation performance and high energy consumption
The walls and floor panels of prefabricated panel houses have limited thickness and high thermal conductivity of materials, resulting in poor winter insulation and weak summer heat insulation. Indoor temperatures are significantly affected by the outside environment, requiring continuous heating in winter and prolonged cooling in summer, with energy consumption far exceeding that of cast-in-place buildings. Long-term high energy consumption not only increases living costs but also exacerbates energy waste, failing to meet green building standards.

5. Insufficient overall performance and poor sound insulation
Gaps exist at the joints of prefabricated panels, and even with ring beams and anchoring connections, their overall integrity is still far inferior to that of cast-in-place panels. These gaps easily become channels for leakage and have weak sound-blocking capabilities, causing significant noise interference between neighbors and affecting sleep quality. Additionally, the high efficiency of floor vibration transmission means that noise from activities on the upper floor is directly transmitted to the lower floor, reducing living comfort.