Disadvantages of Cement Prefabricated Houses in Hunan
The disadvantages of cement prefabricated houses in Hunan are mainly reflected in aspects such as safety hazards, susceptibility to water leakage, poor sound insulation, common quality defects, risks of uneven structural stress, and quality issues.
Prominent safety hazards: Cement prefabricated houses are assembled from prefabricated components, resulting in relatively poor structural integrity. Their earthquake resistance is generally lower than current building codes, making it difficult to effectively withstand the impact of disasters such as earthquakes. In the past decade of building safety accidents, prefabricated panel houses accounted for approximately 27%. Even minor earthquakes can cause house collapses. Moreover, the quality of prefabricated cement panels on the market varies greatly, with a majority being of inferior quality. They have extremely short service lives and are prone to causing house collapses and casualties.
Serious water leakage problems: There are gaps between prefabricated panels. If waterproof materials are not used correctly during construction, rainwater can easily seep in through these gaps. Once rainwater seeps in, it can corrode the internal steel bars, which, over time, will affect the safety and stability of the house structure.
Poor sound insulation: The thickness of prefabricated panels is usually around 10 centimeters, with long circular holes in the middle. Sound has strong penetrating power, and the structure itself is prone to transmitting sound. Their sound insulation performance is 12 - 15 decibels lower than that of brick-and-concrete houses. Actual measurements show that the indoor noise level can reach 45 decibels, while that of brick-and-concrete houses is only 38 decibels, seriously affecting living comfort.
Common quality defects: The connection points between modules are the main risk areas. Improper treatment of the gaps between prefabricated panels can easily lead to water leakage. A quality inspection agency's sampling inspection shows that 15% of prefabricated houses have water leakage problems at the joints. Although theoretically, the service life of prefabricated houses can reach 50 years, in actual use, problems such as connector corrosion and micro-cracks can occur after about 10 years.
Risk of uneven structural stress: The installation of cement prefabricated houses requires precise calculations and standardized operations. If the installation is improper or the calculations are inaccurate, it can lead to uneven structural stress and the risk of collapse.
Frequent quality issues: Some prefabricated panel manufacturers cut costs by tampering with materials, such as reducing the number of steel bars or using inferior cement, resulting in substandard quality of the prefabricated panels and further exacerbating the safety hazards of the houses.
