Is Container House Insulated?

Container houses can achieve thermal insulation through various methods and possess good insulation performance.

Conventional insulation measures: Container houses often adopt composite wall structures for insulation. For example, the outer layer uses anti-corrosion color-coated steel sheets to reflect sunlight, the middle layer is filled with over 50mm of polyurethane foam to block heat conduction, and the inner layer employs fire-resistant gypsum boards and moisture-proof films for coordinated temperature control. This structure can make the wall heat transfer coefficient ≤ 0.45W/(㎡·K), with an insulation efficiency 1.8 times that of traditional brick-and-concrete walls. Measured data shows that in summer at noon, the temperature rise inside the container is 22 minutes slower than that outside, and in winter, with the container closed for 8 hours, the indoor temperature only drops by 1.3℃, with a gentle fluctuation in perceived temperature.

Bridge-cut inner lining structure: To address the thermal bridge effect of metal container walls, some products adopt a bridge-cut design, filling hard polyurethane foam between the steel frame and inner wall panels and adding rubber insulation pads at the frame connections. This structure can reduce the heat exchange efficiency between the inside and outside of the container by about 40%. In winter without heating, the indoor temperature is 8 to 10℃ higher than the outside, significantly reducing the energy consumption of heating equipment.

Multi-layer construction system: In northern regions, a three-layer construction is commonly used: the outer layer is a 0.6mm thick galvanized sheet to resist wind and sand, the middle layer is filled with 80 to 100mm thick rock wool as the main insulation layer, and the inner layer uses PVC-coated steel sheets to reduce heat radiation. Some enterprises also add an elevated layer at the bottom of the container to block ground thermal bridge conduction, reducing indoor temperature fluctuations by about 40% compared to traditional color-coated steel sheet houses.

Performance optimization details: The airtightness treatment of door and window sealing strips and joints is crucial; otherwise, local condensation may occur. In addition, designs such as aluminum foil reflective layer sandwich panels, adjustable sunshades, and bottom ventilation slots can further enhance insulation effects. For example, a café in Mogan Mountain uses sandwich panels with aluminum foil reflective layers, combined with ventilation design, to maintain a comfortable indoor temperature even under direct sunlight.