How is the Thermal Insulation Performance of Prefabricated Houses?

The overall thermal insulation performance of prefabricated houses is relatively poor, with specific manifestations and reasons as follows:

Thermal Insulation Performance

Prefabricated houses have significant defects in thermal insulation, primarily reflected in their inadequate seasonal temperature regulation capabilities. In summer, due to poor thermal insulation, indoor heat is difficult to effectively block, causing the room temperature to rise sharply and creating a high-temperature environment similar to a 'steamer', greatly reducing living comfort. In winter, the opposite occurs: indoor heat is easily lost through prefabricated components, causing the temperature to drop rapidly and creating a cold environment like an 'ice cellar', necessitating reliance on additional heating equipment to maintain a basic temperature. This extreme temperature difference not only affects the living experience but may also increase energy consumption, forming the typical characteristic of being 'cold in winter and hot in summer'.

Reasons for Poor Thermal Insulation Performance

The core reason for the inadequate thermal insulation performance of prefabricated houses lies in their structural characteristics. Prefabricated panel houses are usually assembled from cement components. Although cement, as the main material, has high strength and durability, its high thermal conductivity and fast heat transfer efficiency make it difficult to effectively block external temperature changes. The assembly process further exacerbates this issue—gaps between components may become channels for heat transfer, and even with sealing treatment, it is difficult to completely eliminate the thermal bridge effect. Additionally, to reduce costs or simplify construction, some prefabricated houses may not have specialized thermal insulation layers (such as polystyrene boards or rock wool boards) installed in walls, roofs, and other areas, further weakening their thermal insulation performance.

Thermal Insulation Situation of Special Types of Prefabricated Houses

It should be noted that the thermal insulation performance of prefabricated cave dwellings is not yet clear. Traditional cave dwellings rely on the loess layer for natural thermal insulation, keeping them warm in winter and cool in summer. However, if prefabricated cave dwellings use modern materials (such as concrete) instead of loess, their thermal insulation effect may change due to differences in material thermal conductivity. Currently, there is a lack of systematic research on the thermal insulation performance of prefabricated cave dwellings, so it is impossible to directly judge their advantages and disadvantages. A comprehensive assessment needs to be made based on specific materials and structural designs.

Summary

The thermal insulation performance of prefabricated houses is jointly affected by factors such as material thermal conductivity, structural assembly methods, and the presence of thermal insulation layers, with an overall poor performance. To improve thermal insulation effects, methods such as increasing the thickness of thermal insulation layers, selecting materials with low thermal conductivity (such as aerated concrete), and optimizing the sealing of assembly joints can be used for optimization. However, costs and construction difficulties need to be weighed.