Is the Thermal Insulation of Container Houses Good?

The thermal insulation of container houses depends on factors such as materials, design, and wall panel thickness. With proper configuration, they can meet most living needs, but targeted optimization is required in extreme environments.

1. Material selection directly affects thermal insulation performance
The outer shell of container houses is typically made of color-coated steel sandwich panels, filled with thermal insulation materials such as polyurethane and rock wool. Polyurethane, with its closed-cell structure, effectively prevents heat transfer and air convection, and is cost-effective, making it a high-value choice. Rock wool is renowned for its high-temperature resistance and excellent fireproof properties, but it has strong water absorption and requires moisture-proof treatment. Some high-end products use double-glazed or special thermal insulation glass to further reduce heat conduction and enhance insulation effects. Additionally, although aerogel vacuum panels offer superior thermal insulation performance, they are expensive and less economically viable, resulting in limited practical applications.

2. Wall panel thickness is a core indicator of thermal insulation performance
Measured data shows that wall panel thickness plays a decisive role in maintaining indoor temperature:

• Mild cold environment (0°C to 5°C): A 150mm wall panel container can maintain an indoor temperature above 15°C solely through sunlight and body heat, without the need for additional heating equipment.
• Severe cold environment (-5°C to -10°C): A 75mm wall panel container, when equipped with heating equipment, can reach a comfortable standard of 18°C, while a 150mm wall panel container can stabilize at 20°C to 22°C, significantly reducing heating energy consumption.
• Extreme cold environment (-20°C to -30°C): A 50mm wall panel container is completely unsuitable for living; a 75mm wall panel container relies on high-power floor heating to maintain a temperature above 10°C; a 150mm wall panel container, when paired with a floor heating system, can still maintain a temperature of 18°C to 20°C, but heating costs are high.

3. Structural design optimization can reduce heat loss
The modular structure of container houses requires attention to gap treatment, using sealing strips and thermal-break aluminum doors and windows to reduce air convection. Additionally, the roof can be equipped with an insulation layer or a sloped design to prevent heat loss caused by snow accumulation; the floor can be laid with moisture-proof and thermal insulation layers to prevent cold air infiltration from the bottom.

Conclusion
The thermal insulation performance of container houses can be significantly improved through material upgrades, increased wall panel thickness, and structural optimization, meeting living needs from mild cold to severe cold regions. However, in extreme cold environments, it is necessary to choose wall panels thicker than 150mm and pair them with heating equipment, or adopt passive energy-saving designs (such as adding solar collectors) to reduce energy consumption.