How to Prevent Dampness in Container Houses

Preventing dampness in container houses requires a comprehensive approach involving moisture control at the source, temperature stabilization during the process, precise moisture prevention, along with material selection and routine maintenance.

1. Moisture Control at the Source: Reducing Water Vapor Entry

1. Cargo Pre-treatment
   Ensure that the cargo itself has a low moisture content. For example, clothing should have a moisture content below 12% before leaving the factory, and leather bags should be coated with a moisture-proof layer. Avoid production and stacking on rainy days.
2. Upgraded Packaging
   Choose waterproof film-coated packaging and pair the inner boxes with high-moisture-absorbing desiccants (such as nano desiccants) to balance moisture absorption and gas-phase mold prevention.
3. Dry Container and Pallets
   Wipe off any accumulated water at the bottom of the container before loading. Use dried pallets or plastic pallets with a moisture content below 14% to avoid damp wooden pallets.

2. Temperature Stabilization During the Process: Reducing the Risk of Condensation Due to Temperature Differences

1. Proper Stacking
   Leave a 2-3 cm ventilation gap between the cargo and the container walls and ceiling to prevent direct conduction of low temperatures.
2. Auxiliary Thermal Insulation
   Attach moisture-proof and thermal insulation cotton to the inner walls of the container to buffer diurnal temperature differences and reduce condensation caused by sudden drops in the ceiling temperature.
3. Avoid Extreme Environments
   During the rainy season and summer, avoid high-temperature and high-humidity shipping routes and shorten the voyage to reduce the impact of temperature differences.

3. Precise Moisture Prevention: Scientific Use of Desiccants

1. Choose the Right Type
   Prioritize the use of high-moisture-absorbing container desiccant strips (such as CASANO container desiccant strip D-1000), which turn into a gel after absorbing moisture, absorb water unidirectionally without backflow, and can operate in conditions ranging from -10°C to 80°C and humidity levels from 10% to 99%.
2. Calculate the Right Amount
   Place 6 strips in a 20-foot container, 12 in a 40-foot container, and 14 in a 40-foot high cube container; increase the amount by 30% for tropical routes or leather goods.
3. Proper Placement
   Hang them evenly on both sides of the container ceiling (spaced 1-1.5 meters apart), near areas where water vapor accumulates, and avoid placing them directly on the cargo.

4. Material Selection and Routine Maintenance

1. Moisture-Proof Coatings
   Choose coatings with anti-mold, high-efficiency waterproofing, and corrosion-resistant properties to prevent water entry at the source.
2. Waterproof Sealing
   Regularly inspect the sealant around doors and windows, container body joints, and roof gutters, replacing them every 5-7 years; clear roof leaves to prevent water accumulation and corrosion of the steel plate.
3. Elevated Foundation
   Place the container on a pile foundation to avoid direct contact between the bottom and ground moisture.