Thermal Insulation of Prefabricated Panel Houses

Prefabricated panel houses can improve their thermal insulation performance by optimizing materials, adding thermal insulation layers, and filling gaps.

The issue of poor thermal insulation in prefabricated panel houses is relatively common, primarily due to their design and material characteristics. Most prefabricated panels are hollow structures. While this reduces the building's self-weight, the poor internal air circulation makes it difficult to effectively block heat transfer. In summer, external high temperatures are directly conducted into the interior through the prefabricated panels, resulting in stuffy indoor conditions; in winter, insufficient insulation makes it difficult to maintain indoor temperatures with heating. Additionally, in rural self-built houses, if the construction of prefabricated panels is not standardized (e.g., overly large gaps between panels), heat loss is further exacerbated.

Improving thermal insulation performance can be approached from the following aspects:

1. Adding thermal insulation layers: Laying thermal insulation materials on the surface of prefabricated panels is a direct and effective method. For example, covering the floor with materials such as thermal insulation cotton, polystyrene boards, or rock wool boards can significantly reduce heat transfer. During construction, attention should be paid to the precision of material cutting to avoid gaps that could cause thermal bridge effects and affect overall insulation performance.
2. Optimizing roof design: If prefabricated panels are used for the roof, ventilated thermal insulation layers (e.g., elevated layers) can be added or reflective thermal insulation coatings can be applied. Elevated layers carry away heat through air circulation, while reflective coatings reduce solar radiation absorption and lower the roof surface temperature.
3. Filling gaps and holes: Check the gaps between prefabricated panels and around wall-penetrating pipelines, and fill them with foam or sealant to prevent heat penetration through gaps.
4. Combining traditional materials: In rural self-built houses, traditional methods can be referenced by adding a secondary layer of a mixture of slag, lime, and cement on the prefabricated panel floor. These materials have low density and small thermal conductivity, forming an additional thermal insulation barrier.

Precautions: When carrying out construction independently, ensure the quality of materials and adherence to construction standards to avoid insulation layer detachment or gap enlargement due to improper operation. If possible, it is advisable to consult professionals to design a thermal insulation plan that balances safety and insulation performance.