Insulation for Mobile Home Containers

Insulation for mobile home containers requires comprehensive design from three aspects: materials, structure, and airtightness. The specific methods are as follows:

1. Selection and Filling of Insulation Materials The core of container insulation lies in filling the intermediate layer with high-efficiency thermal insulation materials. Common solutions include:

• Rock Wool Boards: Residential containers in Hohhot generally use 80-100 mm thick rock wool as the main insulation layer. With a low thermal conductivity (approximately 0.036 W/(m·K)) and excellent fire resistance, it is suitable for cold regions in the north.
• Polyurethane Foam Layer: Some manufacturers use polyurethane foam materials over 50 mm thick. Its closed-cell structure can block heat conduction, and its insulation efficiency is 1.8 times that of traditional brick-and-mortar walls (the national "Technical Standard for Steel Structure Integrated Houses" requires a wall heat transfer coefficient of ≤0.45 W/(㎡·K)).
• High-Density Insulation Materials: For low-temperature environments in the north, companies like Zhongye Zhichuang upgrade the filling materials for walls, roofs, and floors, such as using glass wool or phenolic foam, to further reduce heat loss.

2. Structural Layer Design and Thermal Bridge Blocking

• Three-Layer Structure: The typical structure consists of an outer layer of 0.6 mm galvanized sheet (resistant to wind and sand erosion) + an intermediate insulation layer + an inner layer of PVC-coated steel sheet (reducing heat radiation) or fire-resistant gypsum board (controlling humidity and stabilizing temperature).
• Bottom Elevated Layer: Some enterprises in Hohhot add an elevated layer at the bottom of the container to block the conduction of ground cold bridges and prevent the infiltration of cold air from the ground in winter.
• Thermal-Break Windows and Doors: Custom-made containers in the north need to use thermal-break insulated windows and doors to reduce heat loss through the window and door frames and prevent condensation and mold.

3. Airtightness and Moisture-Proof Treatment

• Airtightness Optimization: The sealing strips for windows and doors and the joints must be strictly treated; otherwise, local condensation may occur. For example, by improving the sealing process, container houses in Hohhot have reduced indoor temperature fluctuations by about 40% compared to traditional color steel plate houses.
• Moisture-Proof Film Collaboration: The inner layer of fire-resistant gypsum board needs to be paired with a moisture-proof film to prevent water vapor condensation inside the wall due to temperature differences and avoid a decline in the performance of the insulation material.

4. Additional Design to Enhance Insulation Effects

• Adjustable Sunshade Canopy: For example, a café in Moganshan uses a sandwich panel with an aluminum foil reflective layer, equipped with a sunshade canopy and bottom ventilation slots, to reduce the heating rate of the cabin in summer.
• Ventilation Slot Design: Setting ventilation slots at the bottom can promote air circulation, prevent moisture accumulation, and enhance the stability of the insulation layer.
• Customized Sizes and Combinations: Containers can be customized in sizes (such as 2 meters, 4 meters, 6 meters) and stacked and combined. By optimizing the space to reduce the exposed area, the insulation efficiency is indirectly improved.