| 1 | Base Metal Quality | Confirm the substrate grade, yield strength, tensile strength, elongation, and dimensional tolerances are suitable for the building system. | ASTM A653/A653M, ASTM A792/A792M, EN 10346 | Mill test certificate, material grade declaration, and third-party laboratory report. | Critical |
| 2 | Corrosion Protection | Check metallic coating type, coating mass or thickness, edge protection, and suitability for the project’s atmospheric exposure. | ASTM A653/A653M, ASTM A792/A792M, ISO 12944 | Coating certificate, coating-thickness measurements, exposure classification, and corrosion test records. | Critical |
| 3 | Organic Coating System | Evaluate primer, topcoat, resin type, nominal dry-film thickness, color stability, adhesion, and resistance to chemicals or UV exposure. | ASTM D3359, ASTM D522, ASTM D4587, EN 13523 series | Technical data sheet, paint-system specification, adhesion results, and accelerated-weathering report. | Critical |
| 4 | Available Thickness and Width | Confirm the supplier can consistently produce the required thickness, effective width, coil width, flatness, and cut-to-length tolerances. | ASTM A924/A924M, EN 10143 | Dimensional inspection report, approved shop drawings, sample measurements, and tolerance schedule. | High |
| 5 | Forming and Fabrication Capability | Assess roll-forming accuracy, panel geometry, seam compatibility, perforation capability, folding quality, and protection against handling damage. | Project specification and approved fabrication drawings | Production samples, inspection plan, tooling records, and documented quality-control procedures. | High |
| 6 | Fire Performance | Verify the complete cladding assembly, including insulation, joints, fixings, and substrate, rather than evaluating the sheet alone. | EN 13501-1, ASTM E84, NFPA 285 where applicable | Full-system fire classification, test report, field-of-application statement, and approved assembly details. | Critical |
| 7 | Weatherproofing and Air Infiltration | Review joint design, sealant compatibility, drainage provisions, water penetration resistance, and air-leakage performance of the installed system. | ASTM E283, ASTM E331, ASTM E330/E330M | System test reports, installation manual, joint details, sealant data, and mock-up results. | Critical |
| 8 | Quality Management | Determine whether production, inspection, nonconformance control, traceability, and corrective actions are managed consistently. | ISO 9001 | Valid certificate, audit history, inspection and test plan, batch traceability, and corrective-action records. | High |
| 9 | Sustainability and Traceability | Check recycled-content declarations, environmental product information, responsible sourcing, recyclability, and material-chain documentation. | ISO 14001, ISO 14025, EN 15804 | Environmental management certificate, EPD where available, recycled-content statement, and life-cycle data. | High |
| 10 | Documentation, Warranty, and Supply Reliability | Assess lead time, minimum order quantity, packaging, export experience, technical support, warranty terms, and claim procedures. | Contract requirements and project quality plan | Written quotation, delivery schedule, warranty document, packing specification, references, and after-sales process. | High |