Container House Floor Treatment

The core task of floor treatment for container houses is to provide a uniform and stable load-bearing foundation for the house, while also taking into account moisture resistance, flatness, and long-term adaptability.

I. Basic Treatment Requirements

1. Load-Bearing Uniformity
   Container houses have high requirements for the flatness of the ground foundation, ensuring that there is no risk of local settlement after the container is placed. According to the "Requirements for Ground Foundations of Container Structures", the ground flatness should be controlled within ≤3mm/2m. Otherwise, self-leveling or concrete leveling layers should be used for treatment. For example, when laying Heyuan moisture-proof container houses on unhardened ground, the soil should be compacted first, a gravel bedding layer should be laid, and then a concrete foundation layer should be poured.

2. Moisture-Proof Treatment
   Container houses placed in damp environments such as mud or grass for long periods need a moisture-proof layer between the ground and the container. Common practices include:

• Laying moisture-proof pads (such as high-density polyethylene film);
• Adding ventilation slots at the bottom of the walls to divert ground moisture;
• Adding moisture-proof base materials (such as calcium silicate boards) inside the container.
  The moisture-proof design of Heyuan simple container temporary houses adopts such a combined solution, effectively preventing the container from getting damp and moldy.

II. Floor Treatment Solutions for Different Scenarios

1. Hardened Ground (such as concrete or asphalt)
   When directly laying container houses, the flatness and load-bearing capacity of the ground should be checked. If there are cracks or local settlement on the ground, they should be repaired in advance; if the load-bearing capacity is insufficient (such as soft soil foundations), piles should be driven or the foundation area should be expanded. For example, when Qingdao Laoshan District rectified illegal containers, some containers were required to be relocated due to insufficient ground load-bearing capacity.

2. Unhardened Ground (such as mud or grass)
   A composite foundation layer needs to be constructed:

• Bottom layer: Compact the soil and lay gravel (thickness ≥100mm) to improve drainage;
• Middle layer: Pour C20 concrete (thickness ≥150mm) as the main load-bearing component;
• Top layer: Lay moisture-proof pads or epoxy floor paint to isolate moisture.
  Harbin Zhengbin Containers adds insulation boards (such as polyurethane boards) to the foundation layer for cold climates to prevent the influence of permafrost on the stability of the container.

III. Long-Term Use Precautions

1. Regular Inspection and Maintenance

• Inspect the ground foundation for cracks or settlement every six months;
• The moisture-proof layer should be replaced every 3-5 years (the replacement cycle should be shortened in humid southern regions);
• The contact area between the bottom of the container and the ground should be cleaned regularly to prevent blockage by debris, which can lead to poor drainage.

2. Adaptive Modification
   If the container house needs to be moved, the ground conditions of the new site should be evaluated. For example, when moving from hardened ground to unhardened ground, a gravel bedding layer should be relaid and the foundation should be reinforced to prevent the container from tilting or deforming.