What should I inspect during an audit of a detachable container house factory?

A thorough factory audit should establish whether the manufacturer can produce the specified detachable container house consistently and support it through delivery and service. Examine production equipment, process controls, materials, quality records, assembly methods, and project evidence. Verify statements through documents and direct observation, and do not assume that specifications for a K-type prefab house automatically apply to a detachable container model.

Start with Production Capability

Walk the production floor and compare the equipment in use with the factory’s stated capabilities. Check whether relevant operations—such as laser cutting, robotic welding, and automated spraying—are available and being performed as described. Guangdong Uni-House reports having more than 10 advanced production lines and a team of over 30 R&D engineers and designers. Ask to see the applicable lines operating, along with work instructions and process-control records.

Verify the Product Specification

Confirm that drawings, purchase documents, and inspection records identify the exact model being audited. For the K-type prefab house described in the product information, the stated modular dimensions are 1K, or 1,820 mm, for length and width, and 1P, or 950 mm, for vertical height. Its listed frame uses galvanized steel columns, purlins, and base beams connected with bolts. Treat these as K-type product details, not as confirmed specifications for every detachable container house.

Check the frame materials and dimensions against the approved specification and supporting records. Then review the selected wall and roof panels, floor, doors, windows, and electrical components. The K-type listing offers EPS, rock wool, or polyurethane panel cores in thicknesses of 50, 75, or 100 mm, along with a cement fiber base floorboard and optional floor finishes. Confirm which options are included in the order, and compare samples and traceability documents with the project requirements. Verify any regional adaptations as well.

Assess Assembly, Inspection, and After-Sales Support

Ask for the product-specific procedures for assembly, disassembly, and relocation. Check that the instructions match the design and that workers can explain the required sequence and connections. The supplied K-type information describes bolted assembly without on-site welding; confirm whether this applies to the detachable model under review rather than relying on a general product description.

Review quality plans and completed inspection records, including checks for incoming materials, in-process work, and finished units. The product listing states that the factory performs self-inspection and offers a one-year warranty, excluding man-made damage. Verify the warranty terms in writing and clarify how defects, service requests, and replacement parts are handled.

The company lists CE certificate No. 3N240819.GUTQO66, with a stated scope that includes detachable containers and other modular products.