Insulation of Container Building Houses
For the insulation of container building houses, it is essential to focus on material properties, splicing techniques, airtightness, and multi-layer structural design, as detailed below:
1. The material properties of the enclosure structure are the foundation of insulation performance
Mainstream container houses adopt a steel frame structure with a composite sandwich panel enclosure system, where the density and thickness of the sandwich panels directly affect insulation effectiveness. For example, rock wool sandwich panels or polyurethane foam layers are common choices; the lower their thermal conductivity, the stronger their insulation capacity. China's 'Technical Standard for Steel Structure Integrated Houses' requires that the heat transfer coefficient of walls in residential containers be ≤0.45W/(㎡·K), which is 1.8 times the insulation efficiency of traditional brick-concrete walls. Apple Pod containers achieve ultra-low energy consumption building standards (K value ≤0.28W/㎡·K) through full-house spraying of high-density polyurethane insulation layers, combined with underfloor heating and air conditioning dual heating systems, enabling them to withstand extreme low temperatures of minus 20°C.
2. Splicing techniques and overall airtightness determine the stability of insulation performance
Gaps at panel splices are prone to creating cold bridge effects, significantly reducing insulation performance. Excellent designs address these gaps using bridge-cutting lining structures, rubber thermal insulation pads, or sealing strips. For example, Baotou Camp Container House Company employs a bridge-cutting lining structure, filling the space between the steel frame and interior wall panels with rigid polyurethane foam, reducing heat exchange efficiency between the interior and exterior of the container by approximately 40%. Additionally, the fit between doors, windows, and frames, as well as sealing treatments at corners, require special attention, such as using insulated glazing and PVC-clad steel plates to enhance thermal insulation and airtightness.
3. Multi-layer structural design is key to coping with extreme climates
Typical insulated container houses adopt a three-layer construction: an outer corrosion-resistant color-coated steel plate reflects sunlight, a middle polyurethane foam layer blocks heat conduction, and an inner fire-resistant gypsum board assists in humidity control and temperature stabilization. For example, Hohhot Residential Container House Company combines a 0.6mm thick galvanized outer layer, an 80-100mm thick rock wool middle layer, and an inner layer of PVC-clad steel plates, reducing indoor temperature fluctuations by approximately 40% compared to traditional color-coated steel houses. Apple Pod containers achieve a service life of over 20 years and withstand coastal humid, high-salt environments through a composite sandwich panel structure, hot-dip galvanized frame, and weather-resistant wall panel design.
4. Scenario-based selection should match actual needs
Construction site camps with long-term occupancy should prioritize products with stable insulation performance and high structural strength; temporary office scenarios with short usage cycles can opt for expandable products; projects requiring frequent relocation are suitable for foldable temporary structures. For example, in Shijiazhuang, where winters are cold and dry, project parties need to focus on the density, thickness, and splicing techniques of sandwich panels. Meanwhile, Qingdao Jiecheng Hongye Refrigerated Containers meet the cold chain logistics industry's needs for rapid deployment and stable temperature control through rigorous technical testing and lifelong after-sales service.
