How to Insulate Container Houses

Insulation for container houses can be achieved through methods such as embedding insulation materials in walls, installing double-layer insulation structures, using aerogel coatings, or laying underfloor heating.

1. Embed insulation materials in walls and apply double-layer gypsum board
Embedding insulation materials inside the walls of a container house is a fundamental and efficient insulation method. Common insulation materials include rock wool boards, expanded polystyrene (EPS) foam boards, or glass wool. These materials have low thermal conductivity and can effectively block heat transfer. After embedding the insulation materials, the wall surfaces should be finished with double-layer gypsum board. Double-layer gypsum board not only secures the insulation materials but also further enhances thermal insulation performance through the internal air layer, while providing a flat wall surface for subsequent decoration. During construction, attention should be paid to the fit between the insulation materials and the walls to avoid gaps that could lead to heat leakage.

2. Install double-layer insulation structures
Double-layer insulation structures improve thermal insulation by adding an air layer or a composite insulation layer. Specifically, an additional layer of insulation board is installed on the outer or inner side of the original container walls, with a certain gap (usually 5-10 cm) left between the two layers to form an air insulation layer. The air layer can significantly reduce heat conduction efficiency, especially suitable for extreme climate regions. If the budget allows, high-performance insulation materials such as aerogel blankets can be filled in the double-layer structure, which offer better thermal insulation performance than traditional materials but at a higher cost. During construction, the airtightness of the double-layer structure should be ensured to prevent heat loss through air convection.

3. Use aerogel coatings for thermal insulation
Aerogel coating is a new type of nanoscale insulation material, with its core component, silica aerogel, having extremely low thermal conductivity (about 0.013 W/m·K). During construction, the coating should be mixed evenly with no more than 5% water and uniformly applied to the inner and outer walls of the container using spraying or rolling methods. Aerogel coating forms a dense insulation layer that effectively blocks heat radiation and conduction, while also possessing fire-resistant and waterproof properties. Its advantages include simple construction, thin thickness (usually 2-5 mm), making it suitable for scenarios with strict space requirements. However, it should be noted that the coating must be completely dry to achieve optimal insulation performance.

4. Lay underfloor heating to raise indoor temperature
Underfloor heating provides uniform heating through radiant heat from the floor, reducing heat loss. When laying underfloor heating in a container house, an insulation board (such as XPS extruded polystyrene board) should be installed on the floor first to prevent heat from transferring downward. Then, underfloor heating pipes should be laid and covered with a cement mortar leveling layer, followed by the installation of floor decoration materials (such as wooden floors or tiles). The underfloor heating system can be combined with clean energy sources such as solar energy or air-source heat pumps to reduce operating costs. It should be noted that the bottom of the container should be waterproofed to prevent damage to the structure from water leakage in the underfloor heating pipes.