Is It Good to Use Prefabricated Panels for House Foundations?

Whether it is good to use prefabricated panels for house foundations depends on the situation. There are potential risks if used as the main structural foundation material, but they are relatively suitable as a damp-proof raised floor.

As a Damp-Proof Raised Floor: Significant Advantages

Prefabricated panels can be used for the raised floor in foundation damp-proofing. The principle is to "exchange space for dryness" by leaving a cavity of 30 - 50 centimeters between the foundation and the first-floor ground. Underground moisture will dissipate in this cavity, effectively preventing the first-floor ground from getting damp. This application method makes full use of the characteristics of prefabricated panels, which are easy to install and relatively low in cost. It can provide good damp-proofing effects for the house, protect the indoor environment from moisture damage, extend the service life of indoor decoration materials, and is an economical and practical damp-proofing solution for areas with high groundwater levels or humid climates.

As the Main Structural Foundation Material: Potential Risks

• Prone to cracking and water leakage: Prefabricated panels are composed of spliced sections, and there are gaps between the sections. When bearing the weight of the house for a long time and being affected by factors such as foundation settlement and temperature changes, these gaps are likely to expand, leading to cracking and water leakage problems. Once water leakage occurs, it will not only affect the functionality of the house but may also pose a threat to the structural safety of the house, such as corroding steel bars.
• Poor seismic performance: The connection method at the overlapping ends of prefabricated panels is relatively weak, and their seismic performance is far inferior to that of cast-in-place panels. In the event of natural disasters such as earthquakes, the foundation with a prefabricated panel structure may not be able to effectively resist the seismic forces, which can easily lead to the collapse of the house and cause serious harm to the lives and property of the occupants.
• Insufficient sound insulation and durability: The sound insulation effect of prefabricated panels is poor, and sounds between adjacent rooms are likely to interfere with each other, affecting the comfort of living. At the same time, their durability is also inferior to that of cast-in-place panels. During long-term use, they are prone to aging and damage problems, requiring frequent maintenance and replacement, which increases the cost of use.

In conclusion, prefabricated panels are more suitable for use as a damp-proof raised floor and are not recommended for direct use as the foundation material for the main structure of a house.