Sound and Thermal Insulation of Prefabricated Houses

The sound and thermal insulation performance of prefabricated houses was initially inadequate, but modern technology has significantly improved it, with some products even meeting or exceeding traditional building standards.

Early prefabricated houses, especially prefabricated panel houses, generally suffered from poor sound insulation and weak thermal insulation due to material and structural limitations. Specific manifestations include:

1. Inadequate thermal insulation: The thin walls and high thermal conductivity of materials in traditional prefabricated panel houses led to stuffy interiors in summer and low air-conditioning cooling efficiency; in winter, heat was lost quickly, making it difficult for heating to warm up the space. This characteristic of being "hot in summer and cold in winter" not only reduced living comfort but also resulted in a sharp increase in energy consumption due to long-term reliance on air conditioning and heating, thereby increasing electricity costs.
2. Poor sound insulation: Gaps existed at the joints of prefabricated components, and the low density of wall materials resulted in weak blocking capabilities against airborne and structure-borne sound. For example, normal conversations between neighbors and noise from equipment operation could easily penetrate the walls, affecting privacy and rest.

With technological advancements, modern prefabricated houses have significantly improved their sound and thermal insulation performance through material upgrades and structural optimizations:

1. High-performance thermal insulation materials: The use of new thermal insulation layers such as polystyrene boards, rock wool, and vacuum insulation panels, combined with thermal-break aluminum alloy doors and windows, effectively reduces heat conduction. For instance, the thermal conductivity of vacuum insulation panels can be as low as 0.004 W/(m·K), much lower than that of traditional concrete (1.7 W/(m·K)), significantly enhancing thermal insulation efficiency.
2. Composite wall structures: By combining multiple layers of materials (such as concrete + thermal insulation layer + decorative panel), a "thermal buffer layer" is formed, reducing the impact of external temperature fluctuations on the interior. Some designs also incorporate double-layer walls filled with sound insulation cotton in the middle to further block sound transmission.
3. Sealing and connection technologies: Improvements in component joining processes involve using elastic sealants or rubber gaskets to fill gaps, reducing air infiltration and sound bridge effects. For example, the tongue-and-groove connection design between prefabricated wall panels enhances structural integrity while reducing noise transmission.

Summary: Early prefabricated houses had shortcomings in sound and thermal insulation due to technological limitations, but modern prefabricated buildings have achieved significant performance improvements through material innovations and structural optimizations. When choosing, consumers can focus on whether the product uses new thermal insulation materials, composite wall designs, and sealing processes to ensure living comfort and energy efficiency.