Insulation Issues and Solutions for Container Houses

The lack of insulation in container houses can be caused by various factors, but significant improvements in insulation performance can be achieved through reasonable modifications. The specific causes and solutions are as follows:

1. Inappropriate choice of insulation materials The insulation effect of container houses is directly related to the performance of the materials used. If materials with low thermal conductivity and good insulation properties (such as polystyrene boards, polyurethane foam boards, rock wool boards, etc.) are not selected, heat will quickly transfer through the walls, leading to significant temperature fluctuations indoors. Modification suggestion: Prioritize insulation materials with a thermal conductivity of ≤0.03W/(m·K). For example, rock wool boards not only have excellent fire resistance but also effectively block heat transfer when their density meets the standard (usually ≥80kg/m³).

2. Lack of additional insulation layers If relying solely on the metal shell of the container without adding insulation layers to the exterior or interior walls (such as externally hung insulation boards or internally attached thermal insulation boards), heat will directly conduct through the metal to the indoors and outdoors. Modification suggestion: Adopt an “external insulation + interior decoration” structure, such as attaching 50mm-thick polystyrene boards to the exterior of the container and installing gypsum boards or calcium silicate boards on the interior to form a double thermal insulation barrier.

3. Unreasonable design of windows and doors The thermal conductivity of single-pane glass is 3-5 times that of double-glazed units, and the edges of doors and windows without sealing strips can form “thermal bridges,” leading to heat leakage. Modification suggestion: Replace with double-glazed units (with a gap of ≥12mm) and use weather-resistant sealant at the joints between the door and window frames and the walls to reduce air infiltration.

4. Improper handling of details in the insulation system If the joints between insulation materials are not sealed with specialized tape or foam sealant, or if there are gaps between the insulation layer and the container structure, local heat loss can occur. Modification suggestion: During construction, adopt a “staggered joint粘贴 (should be 'staggered joint pasting' in proper context, but kept as is for direct translation)” technique to ensure tight joints between insulation boards; use elastic sealing materials at container corners and areas where pipes penetrate the walls.

5. Thin wall panels or inadequate rock wool density The insulation of container houses mainly relies on wall panels and the roof. If the thickness of the wall panels is <50mm or the density of the rock wool is <80kg/m³, the insulation performance will decline. Modification suggestion: Increase the thickness of the wall panels to 75-100mm and select hydrophobic rock wool with a density of ≥100kg/m³, while ensuring that the insulation layers on the roof and walls are continuous without breaks.

6. Differences in structural materials The thermal conductivity of the metal shell of a container (approximately 45W/(m·K)) is much higher than that of brick-and-mortar structures (approximately 0.8W/(m·K)), resulting in poor initial insulation performance. Modification suggestion: Reduce thermal bridges through “thermal break design,” such as adding thermal insulation pads between the metal frame and the insulation layer or adopting a composite wall structure (metal + insulation layer + decorative layer).

Through targeted modifications, the insulation performance of container houses can approach that of ordinary houses, meeting the needs of residential or office use.