How Container Houses Are Manufactured
Updated 2026-11-01 · JIUJIAN GLOBAL technical team
Production runs: steel cutting and frame welding, shot blasting and painting, panel cutting and laminating, floor deck, wall and roof assembly, door and window fitting, electrical and plumbing rough-in, interior finishing, then QC, sealing and packing. The QC gates that matter are frame dimensional check, weld and coating inspection, panel joint fit, electrical test and the water test on wet areas.
Manufacturing a container house is assembly, not construction: the same sequence, at a fixed station, with the same crew. That repeatability is why the units are consistent and why a defect, once introduced, repeats across an order.
The sequence
| Stage | Work | QC gate |
|---|---|---|
| 1 | Steel cutting, frame welding | Dimensions, squareness, weld inspection |
| 2 | Shot blasting, primer, topcoat | Dry film thickness, coverage at edges |
| 3 | Panel cutting and laminating | Core density, panel thickness, facing bond |
| 4 | Floor deck and underframe | Level, insulation, penetration sealing |
| 5 | Wall and roof assembly | Joint alignment, gasket compression |
| 6 | Doors, windows, hardware | Operation, seal line, lock alignment |
| 7 | Electrical and plumbing rough-in | Circuit layout, pressure test, drain fall |
| 8 | Interior finishing | Floor, wall, ceiling, wet area water test |
| 9 | Final QC, sealing, packing | Serial numbers, photos, packing list |
The three stages where problems originate
- Frame: out-of-square frames make doors bind and panels gap; the check is diagonal measurement before assembly.
- Panel joints: insufficient gasket compression or sealant applied to a dusty surface; the check is a water spray at corners.
- Fit-out: drains installed without fall, cables undersized for the appliance list; the check is a flow test and a load calculation.
Coating and corrosion
For coastal or industrial sites, specify the corrosion category and the dry film thickness, and ask for the coating report. Edge coverage matters more than the flat surface value: cut edges and welds are where rust starts.
Packing for export
Corner protection, strapped stacks for flat pack, locking bars for folding units, and a packing list per container with module serials and weights. Loose items are boxed, labelled and listed; a missing box is a missing bathroom fitting three weeks later on site.
Related: manufacturing process page, quality control, factory audit checklist.
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