Thermal Insulation and Sun Protection of Container Houses

The thermal insulation and sun protection of container houses can be achieved through material selection, structural design, and additional measures, with the core being to block heat conduction, reflect solar radiation, and promote heat dissipation.

I. Material Selection and Structural Optimization

1. Multi-layer Composite Walls
   Adopt a structure of 'outer anti-corrosion color-coated steel plate + intermediate polyurethane foam layer (≥50mm) + inner fire-resistant gypsum board + moisture-proof film' to effectively block heat conduction. The polyurethane foam layer has a low thermal conductivity coefficient, reducing heat transfer; the fire-resistant gypsum board and moisture-proof film work together to maintain stable indoor humidity and avoid discomfort caused by humidity changes. According to the national 'Technical Standard for Steel Structure Integrated Houses', the heat transfer coefficient of residential container walls should be ≤0.45W/(㎡·K), with an insulation efficiency 1.8 times that of traditional brick-concrete walls.

2. New Thermal Insulation Coatings
   Apply reflective cooling coatings that can reduce surface temperature by reflecting solar radiation (such as infrared and ultraviolet rays) and dissipating heat through the material itself without the need for electricity. Experiments show that the temperature difference between insulated glass coated with this coating and ordinary glass can reach 10℃ after one minute of heating, and the surface temperature reduction in the Hainan storage tank project exceeded 20℃. Such coatings can be directly sprayed on metal, glass, and other material surfaces without altering the building's appearance and reducing energy consumption.

3. Alternative Thermal Insulation Materials
   Materials such as polystyrene foam boards and rock wool can also be used for container insulation. Polystyrene foam boards, when processed into composite building materials, offer significant insulation effects; rock wool blocks heat transfer through its fibrous structure and also has fire-resistant properties.

II. Additional Thermal Insulation Measures

1. Roof Structure Improvement
   Increase the roof height or adopt a double-layer structure to add an air layer, utilizing the low thermal conductivity of air to form a thermal insulation barrier. For example, a container house in Texas, USA, solved its insulation problem by raising the ceiling height and used cut-off container corners to build the roof, improving material utilization.

2. Shading and Ventilation Design
   Equip with adjustable shading canopies, bottom ventilation slots, or sloped roofs to reduce direct sunlight and promote air circulation. For example, the Mogan Mountain double-decker container café uses aluminum foil reflective sandwich panels, shading canopies, and ventilation slots, maintaining indoor comfort without air conditioning in the afternoon as measured.

3. Modular Prefabrication Technology
   Prefabricate container houses with integrated thermal insulation modules in factories, ensuring uniformity of the insulation layer through standardized production. For example, a pitched-roof container house adopts a fire-resistant sandwich panel flat installation design, combined with prefabrication technology to enhance overall thermal insulation performance.