Dampproofing of Container Houses

Dampproofing of container houses requires comprehensive treatment from multiple aspects such as material selection, structural design, construction techniques, and daily maintenance. The specific methods are as follows:

1. Dampproof Coatings and Surface Treatment
The main body of a container house is made of steel, so it is necessary to choose dampproof coatings with anti-mold, corrosion-resistant, and highly waterproof functions. The coating should be able to maintain surface integrity for a long time, prevent moisture penetration, and inhibit mold growth to avoid odors and pollution. During construction, ensure that the container surface is dry and clean, and the coating is uniform without omissions, paying special attention to areas prone to water accumulation such as welds and corners.

2. Elevated Foundation Design
Container houses should adopt independent foundations, elevating the container body above pile foundations to avoid direct contact with ground moisture. This design not only prevents dampness but also repels insects and facilitates site leveling, making it particularly suitable for humid areas or environments with high soil moisture content.

3. Waterproof Sealing and Structural Protection

• Doors, Windows, and Joint Seams: Use weather-resistant sealants and replace them regularly (every 5-7 years) to ensure no leakage around doors, windows, and container joint seams.
• Roof Treatment: Apply waterproof coatings or install non-curing rubber asphalt waterproof layers, paired with root-resistant membranes, to prevent rainwater penetration. Regularly clean roof gutters to avoid water accumulation and corrosion of steel plates.
• Wall Insulation: Add insulation layers to interior walls (such as extruded polystyrene boards or polyurethane spraying) and attach dampproof thermal insulation cotton to exterior walls to reduce condensation caused by temperature differences.

4. Ventilation and Humidity Control

• Natural Ventilation: Improve air circulation and reduce indoor humidity through staggered floor designs, large floor-to-ceiling windows, or roof skylights.
• Mechanical Ventilation: In humid areas or during the rainy season, install intelligent ventilation systems or dehumidifiers to maintain indoor dryness.
• Thermal Insulation Measures: Avoid exposing container houses to extreme temperature differences, such as using sunshades in summer and thermal curtains in winter, to reduce condensation on container walls.

5. Application of Desiccants and Dampproof Materials

• Container Desiccants: Hang highly hygroscopic desiccant strips (such as CASANO container desiccants) inside the container to absorb excess moisture, especially suitable for maritime transport or humid climates.
• Dampproof Flooring: Avoid using wooden floors with excessive moisture content and opt for materials with good dampproof performance (such as tiles or composite flooring), or lay dampproof membranes to isolate moisture.

6. Regular Inspection and Maintenance

• Corrosion Protection and Repainting: Annually inspect rust-prone areas such as container welds, corners, and bottoms. Immediately sand and repaint any rust spots found, adjusting the repainting cycle based on environmental humidity (7-10 years in humid southern regions, 3-5 years in coastal areas).
• Drainage System: Ensure site drainage is unobstructed to avoid water accumulation around the container. Elevated foundation designs can further reduce moisture rise.