Waterproof Structure Diagram of Container House

The waterproof structure of container houses requires special attention to the treatment of box joints, roof and wall nodes, combining waterproof membranes, sealing materials, and reasonable drainage design to achieve anti-seepage functionality.

Waterproof Treatment of Box Joints

Container houses are assembled from multiple standard boxes, and the joints are weak points for waterproofing. High-elasticity sealant should be used to fill the vertical and horizontal gaps between the boxes, and waterproof membranes or metal pressure strips should be applied on the outer side of the joints for double protection. For example, at the top joint of the boxes, the surface impurities of the gap can be cleaned first, a special primer can be applied to enhance adhesion, then polyurethane sealant can be filled, and finally a 1.5mm thick self-adhesive waterproof membrane can be covered to ensure no leakage channels at the joints.

Roof Waterproof Structure

The roof should be designed with a slope (usually ≥3%) to guide rainwater to drain quickly and avoid water accumulation. The roof base should be flat and firm, and dust should be removed and cracks repaired before applying waterproof coating. The waterproof layer can adopt a two-layer defense: the bottom layer is non-curing rubber asphalt waterproof coating, and the top layer is 4mm thick SBS modified asphalt waterproof membrane. The overlap width of the membrane should be no less than 100mm and sealed with a hot air gun. The roof edge should be equipped with an eaves drip line to prevent rainwater from flowing back; additional layers should be added at the parts where pipes and flues protrude from the roof, and sealed with metal hoops.

Wall Waterproof Nodes

The junction between the wall and the floor should be rounded with a radius of 50mm and coated with 1.5mm thick polymer cement waterproof coating to a height of no less than 300mm. Recessed grooves should be reserved around the door and window openings, filled with neutral silicone sealant, and the outer opening should be sloped with waterproof mortar to avoid rainwater accumulation. If metal sandwich panels are used for the wall, the panel joints should be staggered, and the gaps between the panels should be filled with foamed polyurethane and sealed with glue.

Drainage System Design

Container houses should be designed with drainage paths according to the site conditions. Rainwater on the roof can be collected through gutters and directed to downspouts. The spacing between downspouts should not exceed 12m, and energy dissipation devices should be installed at the bottom to prevent ground erosion. The ground should be designed with a drainage slope (≥1%), and floor drains or drainage ditches should be installed at the low points. Gravel filter layers should be laid in the ditches to avoid soil blockage.