Modular Container House Waterproofing

Waterproofing of modular container houses requires special attention to key areas such as seams, door and window closures, and roof joints, achieving efficient waterproofing through the use of integral waterproof membranes, full sealing with sealant, and slope drainage design.

1. Key Waterproofing Locations and Techniques

1. Seams and Joints
   Seams are the primary channels for rainwater infiltration and must be covered with integral waterproof membranes, complemented by full sealing with sealant. For example, the seams of space capsule-style houses are doubly sealed with membranes and sealant, creating a continuous structure that prevents rainwater penetration. When joining panels, they should be overlapped in the direction of water flow to avoid water accumulation against the flow, while using sealant strips or specialized sealing components to fill gaps and form a continuous waterproof layer.

2. Door and Window Closures and Wall Penetrations
   The connection points between door and window frames and walls are weak spots for waterproofing and require sealing with specialized sealant or waterproof tape. For example, the frames of doors and windows in residential container houses should be coated with sealant and have the edges of the waterproof membrane covered to prevent rainwater from seeping through gaps. Wall penetrations for pipes and cables should have an appropriate slope reserved and be filled with waterproof sleeves or expanding foam to ensure no gaps exist between the penetration and the pipe/cable.

3. Roof Joints and Drainage Design
   Roof joints should be covered with integral waterproof membranes and reinforced with full sealing using sealant. The roof design should incorporate a slope (usually ≥2%) to ensure rapid drainage of rainwater and prevent water accumulation. For example, the roofs of space capsule-style houses use slope drainage design combined with panel structures overlapped in the direction of water flow to create continuous sealing and prevent rainwater backflow or infiltration.

2. Enhanced Waterproofing for Special Environments

In island or rainy regions, the waterproofing techniques for roofs, corners, and closures should be strengthened. For example, the roof can have additional layers of waterproof membrane or use highly weather-resistant materials (such as TPO waterproof membranes). Corners should have metal strips used to secure the edges of the membrane, while closures should be doubly treated with sealant and waterproof tape. Additionally, wall penetrations for pipes and cables should have the length of the waterproof sleeves increased and be coated with waterproof paint to create multiple lines of defense.

3. Technique Selection and Material Requirements

Proper waterproofing techniques require the use of integral waterproof membranes (such as SBS modified bitumen membranes) and neutral silicone sealant to ensure material weather resistance, aging resistance, and adhesion. When joining panels, breaks should be avoided to ensure the continuity of the waterproof layer. For example, the panel joints in residential container houses should be fitted with sealant strips to form an elastic waterproof layer that accommodates slight deformations of the house.