Container House Floor Renovation

The floor renovation of container houses needs to combine structural characteristics and usage requirements to achieve a balance between functionality and cost-effectiveness through foundation treatment, material selection, and process optimization. The specific key points are as follows:

I. Foundation Treatment: Ensuring Uniform Load-Bearing and Structural Stability

The bottom beams of container houses are usually I-beams or channel steels, which have a small contact area with the ground. If placed directly on soft soil layers, uneven settlement is likely to occur due to excessive local pressure, leading to problems such as window and door deformation and wall cracks. Before renovation, it is necessary to remove the loose soil and debris on the ground and compact the original soil layer until the bearing capacity meets the standard. If there is a height difference on the ground (exceeding 30mm) or heavy equipment needs to be supported, an additional concrete cushion layer should be poured or steel beams should be laid for reinforcement to ensure that the foundation flatness error is ≤3mm/2m, preventing subsequent floor materials from experiencing hollowing or arching due to an uneven base layer.

II. Material Selection: Balancing Performance and Cost

1. Insulation Layer: The metal body of container houses has a high thermal conductivity coefficient, so insulation materials need to be added. Commonly used are high-density extruded polystyrene boards (with a thickness of 20-50mm) or rock wool boards (with a thickness of 80-100mm). The former has a low thermal conductivity coefficient (≤0.03W/m·K) and is suitable for cold regions; the latter has excellent fire resistance (Class A non-combustible) and is suitable for scenarios with high fire safety requirements.
2. Floor Materials:
   • Laminate Flooring: The surface wear-resistant coating can resist soil pollution. The snap-in installation does not require glue and can be directly laid on the insulation layer. The cost is about 38 yuan/㎡, suitable for scenarios with a limited budget and a pursuit of rapid renovation.
   • SPC Stone-Plastic Snap-In Flooring: With a thickness of 4-6mm, a commercial-grade wear layer of ≥0.5mm, and excellent waterproof and moisture-proof performance, the cost is 180-320 yuan/㎡, suitable for shops or office scenarios with heavy foot traffic.
   • Modular Flooring: For example, snap-in stone-plastic boards can be directly laid on the compacted base layer without cement mortar leveling, reducing waste by 60% and shortening the construction period by 40%. The comprehensive cost (including auxiliary materials and labor) is about 380-650 yuan/㎡.

III. Process Optimization: Dry Construction to Improve Efficiency

1. Coordinated Renovation of Prefabricated Partition Walls and Floors: If space needs to be divided, prefabricated partition walls made of light steel keels + calcium silicate boards or ALC boards should be preferred and constructed simultaneously with modular floors. The keel spacing of the partition walls should be controlled within 400mm to ensure structural stability; before floor laying, the flatness of the base layer should be tested. If the error exceeds the standard, self-leveling treatment should be carried out to prevent floor noise or arching.
2. Thermal Performance Compensation: In northern regions, an elevated layer (with a height of 50-100mm) should be added at the bottom of the container body to block the conduction of ground cold bridges; airtight tape should be used at the window and door interfaces to reduce indoor temperature fluctuations (reduced by about 40% compared with traditional color steel plate houses).

IV. Acceptance and Pit Avoidance: Key Indicator Control

1. Perpendicularity and Flatness: The perpendicularity deviation of the partition walls should be ≤3mm, the height difference of the joints of the modular floors should be ≤0.5mm, and the hollowing rate should not exceed 5%.
2. Cost Trade-off: The comprehensive cost of dry construction is 15%-25% higher than that of traditional wet construction, but the construction period is shortened by 40%. The business interruption losses (calculated at 300-800 yuan/day) can usually be recovered within 10-20 days.
3. Long-Term Maintenance: Avoid cutting heavy objects directly on the floor, regularly check the aging of the window and door sealing tapes, and replace them in a timely manner to maintain thermal performance.