Is the Outer Layer of Container Houses Waterproof?

The outer layer of container houses is waterproof, and its waterproof performance is achieved through multiple aspects such as structural design, roof and wall treatment, waterproof materials and techniques, as well as strict waterproof standards.

From the perspective of structural design, the main structure of a container house is made of high-strength steel, which inherently has good waterproof properties. Its airtightness and corrosion resistance can effectively block moisture penetration. The splicing process uses sealing strips and high-strength bolts for connection, ensuring the airtightness of the joints and preventing rainwater from seeping in through the gaps. This design reduces the possibility of moisture entry at the source and lays the foundation for waterproof performance.

Roof and wall treatment are also crucial for waterproofing. The roof usually adopts a slope design, combined with waterproof membranes and drainage systems, which can quickly guide rainwater away, avoiding pressure on the roof caused by water accumulation and thus reducing the risk of leakage. The wall section is waterproofed using multi-layer composite materials, such as applying a waterproof coating on the surface of the steel plate to enhance the waterproof effect and further improve the overall waterproof capability of the house.

In terms of waterproof materials and techniques, high-performance waterproof membranes are used for roof waterproofing, such as SBS modified asphalt membranes or PVC waterproof membranes, with a thickness typically ranging from 1.5 to 2.5 millimeters. Sealant is also used to treat the joints to ensure there are no leakage points on the roof. For wall waterproofing, sealing strips or polyurethane foam are used to fill the gaps, and a waterproof coating is applied on the surface of wall panels (such as color-coated steel sheets) to form multiple waterproof barriers, effectively preventing moisture intrusion.

In addition, the waterproof standards for container houses are very strict. High-quality container houses usually have a waterproof rating of IPX4 or higher, enabling them to keep the interior dry under heavy rain conditions (such as a rainfall rate of 100 millimeters per hour). In simulated rainfall tests, spray equipment is used to simulate continuous heavy rainfall for several hours (e.g., more than 4 hours), and the house is considered qualified if there is no leakage inside. Meanwhile, referring to the 'Technical Code for Building Waterproof Engineering' (GB50345) and the 'Technical Standard for Container Houses' (CECS 334), container houses are required to have no leakage for at least 5 years under normal use conditions, providing reliable protection for users.