Rotten Container House

A rotten container house generally refers to a container-modified building that has structural damage and material decay due to long-term use, environmental erosion, or improper maintenance, posing safety hazards and making it unsuitable for continued habitation.

Main Causes of Rotten Container Houses

1. Material Aging
   The design life of a conventional shipping container is about 10-12 years. After long-term exposure to the high-salinity and highly corrosive marine environment, even if it is retired and modified, its steel will gradually rust due to oxidation, especially for containers without anti-corrosion treatment. If aging materials are not replaced during modification, structural strength may decline during habitation, leading to wall cracks and joint separation. For example, in the case of Mr. Gao in Shanghai, the house next to the container cracked due to foundation soaking, reflecting the environmental erosion of materials.
2. Environmental Factors
   If a container house is in a damp and waterlogged environment (such as near rivers or paddy fields) for a long time or lacks waterproofing, the steel is prone to rusting, and the wooden interior will rot. For instance, Mr. Gao's house cracked due to his neighbor changing dry land to paddy fields, and the foundation was soaked all year round, forcing him to live in a container, which indirectly proves the impact of the environment on the durability of container houses.
3. Lack of Maintenance
   Container-modified houses require regular inspection of steel rusting and joint sealing, as well as timely painting and replacement of damaged parts. Without maintenance, minor problems can accumulate into structural damage. For example, the container house purchased by Mr. Huang in Jiaxing, which was labeled as being able to withstand winds of up to Level 10, was blown down by winds of Level 8 due to shallow nails and thin iron sheets, exposing quality and maintenance issues.

Risks of Rotten Container Houses

1. Structural Safety
   Steel rusting reduces the load-bearing capacity and may lead to collapse. Wall cracks affect thermal insulation and waterproofing performance. For example, the container where Mr. Gao's daughter lives can only accommodate a bed and a desk and has no bathroom, with poor living conditions.
2. Fire Hazards
   Some modified containers use flammable materials such as polystyrene and polyurethane foam. In case of a fire, these materials burn rapidly and are highly toxic, and the iron-sheet enclosure makes firefighting difficult, easily causing casualties.
3. Health Risks
   Rotten materials may release harmful substances, and damp environments are prone to mold growth. Long-term residence may trigger respiratory diseases.