Disadvantages of Prefabricated Panel Houses

The disadvantages of prefabricated panel houses are mainly reflected in the following aspects:

1. Low structural strength and poor earthquake resistance
Prefabricated panel houses are assembled from prefabricated panels, lacking overall firmness and toughness. They often adopt a hollow design, with the quantity and distribution of steel bars being less scientific and reasonable than those in cast-in-place structures, resulting in extremely poor earthquake resistance. Minor vibrations may loosen the floor panel joints, and during earthquakes, they are prone to overall collapse, unable to withstand impacts.

2. Short service life
The lifespan of ordinary concrete buildings is about 70 years, while prefabricated panel houses, due to material and structural defects, typically have a lifespan of only 20-30 years. Over time, structural problems frequently occur, and many old prefabricated panel houses are identified as 'dangerous buildings,' with high repair costs and difficulty.

3. Prominent issues of wall cracks and water leakage
Prefabricated panel houses are prone to wall cracks, ceiling water seepage, and other problems, especially during the rainy season when rainwater may infiltrate indoors through cracks, severely affecting top-floor residents. Long-term leakage can also damage indoor decorations, affecting the living experience.

4. Poor thermal insulation performance
Prefabricated panel buildings have insufficient thermal insulation capabilities. In winter, cold air easily infiltrates through wall gaps and around doors and windows, requiring additional heating; in summer, indoor temperatures rise with outdoor temperatures, increasing the demand for cooling and leading to higher energy consumption and lower living comfort.

5. Vulnerable connection points prone to misalignment and loosening
Prefabricated panels are connected to walls and to each other through simple overlapping or filling, lacking rigid frameworks such as ring beams and structural columns. When the foundation settles or walls crack, the connection points are prone to misalignment and loosening. Long-term weathering or steel bar corrosion can further reduce strength, posing a risk of collapse.

6. Substandard materials prone to brittle fracture
Some prefabricated panel production involves shoddy workmanship and material substitution, such as using thin steel wires instead of steel bars, non-compliant concrete grades, or insufficient thickness, leading to brittle failure. When overloaded, they may instantly fracture, and stacking heavy objects, renovation wall demolition, or aging over time can all trigger collapse, posing serious safety hazards.