What Does Prefabricated House Panel Mean?

A prefabricated house panel is a concrete prefabricated component that is made in advance in a factory and then transported to the construction site to be directly assembled into building components such as floor slabs. It can be introduced in detail from the following aspects:

I. Manufacturing Process
There are usually two ways to make prefabricated house panels. One is to build a hollow mold with wood, insert steel bars as the framework inside the mold, pour cement, and then remove the mold to form the prefabricated panel after the cement dries. The other is to nail a model with wooden boards, arrange steel bars inside the model, pour cement, and finally form the prefabricated panel. According to different internal structures, prefabricated panels can be divided into two types: solid and hollow. Among them, the hollow structure achieves lightweight design by reducing the amount of concrete in non-load-bearing parts.

II. Application Scenarios
Due to their standardized production characteristics, prefabricated panels are widely used in various parts of buildings. The most common use is as floor slabs, which are directly assembled to form the floor surface of a building. They can also be used as roof panels to cover the top of a building. In addition, they can serve as auxiliary components such as ditch covers and roof insulation layers. Their modular design makes the construction process more efficient, especially suitable for large-scale standardized construction projects.

III. Advantages and Disadvantages
The core advantages of prefabricated panels lie in convenient construction and low cost. The factory prefabrication model reduces on-site construction time and standardized production reduces material waste. However, their disadvantages are also significant:

1. Gap issues: Gaps are prone to form at the joints, requiring additional treatment for waterproofing and sound insulation;
2. High dimensional accuracy requirements: If there are deviations in production or installation, it will affect the overall structural stability;
3. Performance limitations: The sound insulation effect is limited, and the seismic performance and integrity are relatively poor, making it difficult to meet the high safety standards of modern buildings.
   Their service life is usually 30 - 50 years, which is greatly affected by the material quality and maintenance conditions.

IV. Modern Alternatives and Policy Orientation
With the development of building technology, cast-in-place concrete and prefabricated buildings are gradually replacing traditional prefabricated panel houses. Cast-in-place concrete forms an integral structure through on-site pouring, solving the problems of gaps and seismic resistance. Prefabricated buildings combine the advantages of prefabrication and on-site installation, further improving construction efficiency. Since 2022, China has implemented the old housing renovation policy, focusing on the repair and renovation of prefabricated panel houses and only demolishing buildings that meet the standards for dangerous houses, reflecting the importance attached to the safety of existing buildings.