Container House

Waterproofing for container houses must be ensured comprehensively across materials, design, construction, testing, and maintenance, achieving an IPX4 or higher waterproof rating and meeting no-leakage requirements for 5+ years.

1. Materials and Processes

Roof waterproofing is the core step: use high-performance waterproof membranes (such as SBS-modified asphalt membrane) or PVC waterproof film, with thickness controlled at 1.5–2.5 mm, and seal joints with sealant. Design should build three lines of defense: a base waterproof layer, a reinforcement layer, and a surface protective coating; flexible waterproof materials (such as polyurethane coating or modified asphalt membrane) enhance sealing at joints. Wall waterproofing relies on sealing strips or polyurethane foam to fill gaps; color-steel and other wall panels need waterproof coatings, and exterior corners, window openings, and similar areas require reinforced treatment to prevent rainwater penetration.

2. Design and Structural Optimization

The building structure should incorporate built-in waterproof layers—for example, waterproof materials laid on roofs and walls to form a continuous barrier. Drainage design is critical: roofs need an adequate slope (typically ≥2%) and drainage elements (such as gutters and downspouts) to avoid ponding. Joint sealing must be tightly controlled with sealing strips, sealant adhesives, and similar materials; door and window perimeters should use three or more sealing layers to eliminate leakage risk at joints.

3. Testing and Maintenance

Waterproof performance should be verified through simulated testing—for example, continuous heavy-rain spray tests lasting 4+ hours, or checks under Force-10 wind with rainfall; the unit passes only if the interior shows no leakage. Routine maintenance should regularly inspect sealants and waterproof layers and repair damaged areas promptly, which can extend waterproof life to 10+ years. Drainage systems should also be cleaned regularly to keep rainwater discharge clear.

4. Environmental Adaptation

High-temperature, high-humidity, or coastal salt-fog environments need more weather-resistant materials, such as EPDM rubber membrane, to resist UV and salt-fog corrosion. Areas with high humidity and flood risk should use recessed floor drainage designs, with waterproof bands and moisture barriers on exterior walls to prevent groundwater or rainwater backflow.

5. Emergency Measures

For container houses that may leak, keep emergency tools such as tarps and buckets on hand; when a sudden leak occurs, quickly cover the seepage point and collect standing water to avoid damage to indoor equipment or slip hazards.