Rural One-Story Prefabricated Panel House
There are many issues to consider carefully when using prefabricated panels for building one-story houses in rural areas. Although there are some advantages, the overall disadvantages are significant.
Low Safety
- Poor Seismic Performance: The connections between prefabricated panels are often made through methods such as grouting in reserved holes and welding. These connection methods are prone to damage under external forces such as earthquakes, leading to the detachment of the panels or overall structural instability, threatening the safety of the occupants.
- Short Service Life: Manufacturers claim that the service life of prefabricated panels can reach 50 years, but in actual use, problems such as aging, rusting, cracking, and leakage may occur after about 10 years, seriously affecting the safety of the house.
- Prone to Leakage and Cracking: Prefabricated panels are relatively large in size, and the floor of a bedroom is composed of multiple panels, resulting in poor overall structural integrity and a tendency for the floor to crack. Moreover, the large gaps between the panels widen over time, making them highly susceptible to leakage during rain.
Prominent Waterproofing Issues
When using prefabricated panels for the roof of a self-built house in rural areas, the waterproofing effect is poor, and the probability of rain leakage is high. It is said that 8 out of 10 houses experience rain leakage, and even those in the waterproofing industry cannot guarantee 100% leak-proofness.
Poor Thermal Insulation
Prefabricated panels are generally about 12 centimeters thick. Although they have a hollow structure, their thermal insulation performance is poor. The indoor temperature is high in summer and low in winter, and it is usually necessary to cover the floor with secondary roofing materials to improve thermal insulation.
Legal and Regulatory Restrictions
Article 54 of the Construction Law of the People's Republic of China and Article 29 of the Regulations on the Administration of Construction Project Quality set clear requirements for the quality and safety standards of construction projects. The use of prefabricated panels may violate relevant laws and regulations due to safety issues. If the panels have quality problems, they will not pass inspections and cannot be used for house construction.
However, prefabricated panels also have some advantages. They are inexpensive and have a fast construction speed. Before 20 years ago, prefabricated cement panels were basically used for roofing in rural self-built houses, and they could be hoisted and installed in a day or half a day. In terms of foundation moisture-proofing for rural self-built houses, there is a method of creating a prefabricated panel suspended floor on the ground beam, achieving moisture-proofing through the principle of 'exchanging space for dryness'.
