Thermal Insulation Inside Container Houses

Thermal insulation inside container houses can be achieved through various methods, with the core focus on blocking heat transfer paths and reducing heat loss. The specific methods are as follows:

1. Select appropriate thermal insulation materials Commonly used materials include polystyrene boards, polyurethane foam boards, and rock wool boards. Polystyrene boards (EPS) are low-cost and lightweight, with a thermal conductivity of approximately 0.03-0.04 W/(m·K), suitable for dry environments. Polyurethane foam boards have a high closed-cell ratio and a thermal conductivity as low as 0.02 W/(m·K), offering superior thermal insulation performance, but at a higher price. Rock wool boards, made from basalt, are heat-resistant and have a high fire rating (Class A), with a thermal conductivity of about 0.036 W/(m·K), suitable for scenarios with strict fire safety requirements. Selection should be based on budget, environmental humidity, and fire safety needs.

2. Add thermal insulation layers

• External insulation layer: Install insulation boards on the exterior walls of the container house, secure them with keels, and cover them with a protective layer (such as metal sheets or cement fiber boards) to form a continuous thermal insulation barrier and reduce thermal bridge effects.
• Internal insulation boards: Directly adhere or nail insulation boards to the interior walls. This method is simple to construct but requires careful sealing of gaps between the boards and the walls to prevent hot air infiltration. Both methods can effectively reduce heat transfer. The external layer is more conducive to protecting the insulation material, while the internal layer saves space.

3. Optimize window and door designs

• Use double- or triple-glazed windows: Their thermal conductivity is 60%-80% lower than that of single-glazed windows, significantly reducing heat exchange through the windows.
• Install seals: Place rubber or silicone seals at the window frames, glass edges, and door gaps to prevent heat loss due to air convection.
• Choose thermally insulated window and door frames: Such as those made from thermal-break aluminum alloy or PVC, to further reduce heat conduction.

4. Detail treatment and sealing

• Seal joints: Use specialized sealants or aluminum foil tapes to seal the joints of insulation materials, preventing gaps from becoming heat transfer channels.
• Treat structural connections: Fill the connections between the insulation layer and the metal frame of the container house with waterproof and thermally insulating materials to prevent thermal bridges caused by the high thermal conductivity of metal.
• Seal wall penetrations: When wires or pipes pass through the walls, use expanding foam or fireproof putty to seal the holes.

5. Use aerogel coatings Aerogel is a nanoporous material with a thermal conductivity as low as 0.013 W/(m·K). During construction, mix the coating with no more than 5% water, stir evenly, and spray or brush it directly onto the walls to form a thermal insulation layer about 5-10mm thick. This coating also has fire-resistant and waterproof properties but is costly, suitable for localized areas with extremely high thermal insulation requirements.

6. Roof thermal insulation treatment Drill holes in the roof of the container house to install fixed brackets, lay light steel keels or wooden frames, and cover them with insulation boards (such as polyurethane boards or XPS boards). This method can block 80% of solar radiation heat but requires ensuring smooth roof drainage to prevent water accumulation from rendering the insulation layer ineffective.