Disadvantages of Prefabricated Hollow Slab Houses

The disadvantages of prefabricated hollow slab houses are mainly reflected in insufficient seismic performance, poor sound insulation and thermal insulation, difficulty in adjusting the internal structure, high risk of water seepage, and relatively short service life.

1. Insufficient Seismic Performance
   Prefabricated hollow slab houses primarily rely on cement for construction. Although a certain amount of steel bars are added, their overall seismic capacity cannot be compared with that of modern buildings. They are assembled from prefabricated slabs, lacking the firmness and toughness of monolithic pouring. Moreover, they often adopt a hollow design, and the quantity and distribution of steel bars are not as scientific and reasonable as those in cast-in-place houses. In the event of an earthquake, slight vibrations may cause the joints between the floor slabs to loosen. Over time, this can lead to an increase in the number and size of cracks, and even the collapse of the entire building.

2. Poor Sound Insulation and Thermal Insulation
   The thermal and sound insulation performance of prefabricated hollow slab houses is inadequate. In summer, the interior is as hot as a "steamer", making it difficult for air conditioners to effectively cool the space; in winter, it is bitterly cold, and the heating effect is limited. This results in a significant increase in energy consumption and a decrease in living comfort. Additionally, the poor sound insulation means that the voices of neighbors can be clearly heard, seriously affecting sleep quality, especially for the health of the elderly and children.

3. Difficulty in Adjusting the Internal Structure
   Unlike modern commercial housing, every wall in a prefabricated hollow slab house may be related to the overall structural stability. Residents find it difficult to make large-scale modifications or customizations to the living space according to their personal needs, limiting the functionality and adaptability of the house.

4. High Risk of Water Seepage
   Over time, cement components are prone to developing cracks, and the gaps between components increase, leading to frequent water seepage problems between floors. Especially in humid weather or during the rainy season, water leakage becomes more severe, with cracks spreading in the corners of walls, water dripping from the roof, and even the formation of a "water dungeon." Long-term water seepage weakens the strength of the walls, increases the risk of collapse, and the humid environment is prone to breeding mold and bacteria, posing a threat to health.

5. Relatively Short Service Life
   The design service life of prefabricated hollow slab houses is about 30 to 50 years. Most of them were built in the 1970s to 1990s, and many have approached or exceeded their service lives, showing signs of aging. Many old prefabricated slab houses have been identified as "dilapidated houses," and the difficulty and cost of repair are high. If there are defects in the construction process or materials, the house may even need to be scrapped in advance.