Is a Container House Cold?
A container house can be cold if no insulation treatment is applied, but with proper design and insulation measures, it can achieve warmth in winter and coolness in summer.
Selection and Application of Insulation Materials
The insulation performance of a container house primarily depends on the choice of insulation materials and construction methods. Commonly used materials for exterior wall insulation include polystyrene boards, polyurethane foam boards, and rock wool boards, which have low thermal conductivity and can effectively block heat transfer. For example, when the thickness of the polyurethane foam layer reaches over 50mm, it can significantly enhance the wall's insulation efficiency, with a heat transfer coefficient as low as 0.45W/(㎡·K), equivalent to 1.8 times that of traditional brick-and-mortar walls. For interior wall insulation, closed-cell methods can be adopted, such as using rock wool, expanded perlite boards, or spraying insulation materials to further reduce heat loss.
Structural Design and Insulation Layer Optimization
The thermal insulation performance of a container house needs to be achieved through a multi-layer structure. A typical structure includes an outer layer of anti-corrosion color-coated steel plate, a middle layer of polyurethane foam, and an inner layer of fire-resistant gypsum board, forming a composite system of 'reflection-blocking-temperature control'. The outer color-coated steel plate reflects sunlight, reducing heat absorption; the middle foam layer blocks heat conduction; and the inner gypsum board, in conjunction with a moisture-proof membrane, stabilizes indoor humidity and temperature. The national 'Technical Standard for Steel Structure Integrated Houses' explicitly requires that the heat transfer coefficient of residential container walls be ≤0.45W/(㎡·K) to ensure their insulation performance meets standards.
Window and Door Design and Sealing Enhancement
Windows and doors are key areas for heat loss. Using double- or triple-glazed windows can reduce thermal conductivity, while adding sealing strips around the edges can effectively minimize air infiltration. For example, a container café in Moganshan achieved a balance between summer cooling and winter insulation by installing sandwich panels with aluminum foil reflective layers, adjustable sunshades, and bottom ventilation slots. Actual measurement data shows that after being closed for 8 hours in winter, the indoor temperature only drops by 1.3℃, maintaining a stable perceived temperature.
Temperature Control Equipment and Detail Handling
Equipment such as air conditioners and graphene floor heating can assist in regulating indoor temperature, but they need to be combined with passive design to reduce energy consumption. For example, a sunroom design can widen floor-to-ceiling windows and sloped roofs to utilize natural lighting and reduce lighting energy consumption. In terms of construction details, the joints between insulation materials should be treated with sealant, and the connection points between the insulation layer and the container structure should adopt professional techniques to ensure no thermal bridge effect. The Khabarovsk project in Russia successfully solved the cold bridge problem in high-latitude regions with severe cold climates by optimizing the design of connected building components.
