Insulation of Prefabricated Panel Houses
Prefabricated panel houses have poor insulation performance, with issues such as poor insulation, high energy consumption, the need for secondary renovation, and design flaws, requiring targeted improvement measures.
1. Poor Insulation: Heat Loss Due to Structural and Material Limitations The floor slabs of prefabricated panel houses typically use a 12-centimeter-thick hollow structure. While this reduces the self-weight, the hollow part lacks efficient thermal insulation materials, making it unable to effectively block heat transfer. In summer, external high temperatures are directly conducted into the interior through the prefabricated panels, causing a significant increase in indoor temperature and limiting the cooling effect of air conditioning. In winter, indoor heat is quickly lost through the prefabricated panels, making it difficult to maintain a comfortable temperature even with heating turned on. This phenomenon of being "cold in winter and hot in summer" is particularly common in rural self-built houses, directly affecting living comfort.
2. High Energy Consumption: Insulation Defects Exacerbate Energy Use Due to the lack of overall thermal insulation design in prefabricated panel houses, during winter heating, most of the heat generated by the heating system is lost through the floor slabs and walls, resulting in slow indoor temperature rise and the need for prolonged operation of heating equipment, leading to severe energy waste. In summer cooling, air conditioners need to operate continuously at high loads to counteract external high temperatures, significantly increasing electricity consumption. In the long run, high energy consumption not only increases the economic burden on residents but also contradicts the concept of low-carbon environmental protection.
3. Need for Secondary Renovation: Traditional Remedial Measures Are Costly and Ineffective To compensate for insulation defects, rural areas often adopt secondary renovation methods such as covering the prefabricated floor slabs with materials like slag, lime, and cement. While these materials can improve insulation performance to some extent, they have the following issues: First, construction requires additional investment in labor and material costs, and the renovation process may damage the original structure; Second, traditional materials have low insulation efficiency and are difficult to meet modern building standards; Third, after renovation, the thickness of the floor increases, which may affect indoor ceiling height and subsequent decoration.
4. Design Flaws: Lack of Integrated Insulation Layer Leads to Inherent Deficiencies Modern prefabricated insulation wall panels typically integrate efficient insulation interlayers such as rock wool or polystyrene boards during factory prefabrication, forming an integrated "structure-insulation" system that significantly reduces heat loss. In contrast, traditional prefabricated panel houses did not consider the integration of insulation layers during design, relying solely on the structural insulation of the floor slabs themselves, which falls short of modern energy-efficient building standards. This design flaw results in inherent insulation performance shortcomings in the houses from the outset of construction, making subsequent renovation difficult and costly.
