How to Insulate Container Houses

The insulation of container houses is mainly achieved by optimizing the structure, selecting insulation materials, and reasonable design.

1. Core Structural Insulation

The thermal performance of container houses relies on three key structural layers: The outer anti-corrosion color-coated steel plate reflects sunlight, the middle polyurethane foam layer over 50mm blocks heat conduction, and the inner fire-resistant gypsum board + moisture-proof film work together to control humidity and stabilize temperature. This combination results in a wall heat transfer coefficient of ≤0.45W/(㎡·K), with an insulation efficiency 1.8 times that of traditional brick-and-mortar walls. In actual tests, the interior of the container warms up 22 minutes slower than the outside in summer, and the room temperature drops by only 1.3℃ after being closed for 8 hours in winter, providing a more stable and comfortable feeling.

2. Material Selection and Construction Optimization

1. Insulation Materials

   • Polyurethane Foam Board: With a low thermal conductivity, it effectively blocks heat conduction and is commonly used in wall sandwich layers.
   • Rock Wool Board: It combines fire resistance and insulation properties, making it suitable for high-temperature or fire-resistant scenarios.
   • Polystyrene Board: It has a relatively low cost but weaker fire resistance, so it needs to be used in combination with other materials.
   • Aluminum Foil Reflective Layer: Adding aluminum foil to the sandwich panel enhances sunlight reflection and reduces heat absorption.

2. Construction Details

   • Increasing Foam Thickness: Enhance the insulation effect by thickening the middle polyurethane layer.
   • Sealing Treatment: Seal the joints of insulation materials and the connections between walls and structures with sealant or professional materials to prevent heat leakage.
   • Internal/External Insulation Layers: Install insulation boards on the exterior walls or insulation panels on the interior walls to form a double insulation barrier.

3. Auxiliary Design Measures

1. Shading and Ventilation

   • Adjustable Shading Canopy: Reduce direct sunlight on the roof and lower heat absorption.
   • Bottom Ventilation Slots: Promote air circulation and prevent heat accumulation.
   • Roof Eaves or Balcony Shading Canopies: Protect against intense sunlight in summer while enriching the building facade.

2. Window and Door Optimization

   • Double/Triple Glazing: With low thermal conductivity, it reduces heat transfer through windows.
   • Weather Stripping: Install weather stripping around windows and doors to prevent the infiltration of hot or cold air.

3. Temperature Control Equipment Supplement
   In extreme climates, air conditioners, floor heating systems, and other equipment can be used to regulate indoor temperature, but attention should be paid to matching the energy efficiency of the equipment with the insulation performance of the house.