| 1. Define the application | Building use and environmental exposure | Record whether the panels are intended for external walls, internal partitions, cold rooms, industrial buildings, warehouses, or modular construction. Note exposure to rain, humidity, salt spray, chemicals, and freeze–thaw cycles. | The required core, facing material, joint design, corrosion resistance, and moisture protection vary substantially by application. | Project specification, climate data, exposure classification, installation drawings, and local building-code requirements. | Create a written performance brief |
| 2. Select the core material | Insulation type and thermal performance | Compare mineral wool, EPS, XPS, PUR/PIR, and honeycomb or non-insulated constructions using declared thermal conductivity. Common product ranges are approximately 0.020–0.045 W/m·K, depending on core material, density, temperature, and ageing. | Lower thermal conductivity can reduce the panel thickness needed to achieve a target U-value, but it must be assessed together with fire, moisture, and ageing performance. | Thermal-conductivity report based on ASTM C177, ASTM C518, EN 12667, or an equivalent recognized method. | Compare declared values at the same test conditions |
| 3. Confirm thermal design | Whole-wall U-value and thermal bridging | Calculate the complete assembly U-value in W/m²·K, including panel joints, fasteners, framing, corners, openings, and thermal bridges. Do not select panels by core conductivity alone. | Heat loss is controlled by the complete wall system rather than the insulation core in isolation. | U-value calculation following ISO 6946 or the applicable national method; thermal-bridge details; condensation-risk assessment. | Approve the assembly, not only the panel |
| 4. Check fire safety | Reaction to fire and fire resistance | Separate reaction-to-fire classification from fire-resistance rating. A panel should be evaluated for the required class or rating for the project, such as EN 13501-1 classification or an applicable ASTM/NFPA-based system. | Fire behavior depends on the core, facings, adhesives, joints, fasteners, and complete wall construction. | Full-scale or applicable fire-test reports, classification reports, fire-resistance reports, and tested assembly drawings. | Reject unsupported fire claims |
| 5. Verify mechanical strength | Wind load, impact, bending, and fastener capacity | Request design values for panel span, allowable wind pressure, concentrated load, deflection, impact resistance, and screw pull-out. Values must be stated for the proposed thickness, span, support spacing, and temperature range. | Nominal thickness does not by itself demonstrate structural or cladding performance. | Product test reports, load tables, calculation notes, panel-span charts, and fastener test data. | Match data to the actual support layout |
| 6. Evaluate moisture durability | Water absorption, vapor control, and joint sealing | Review water absorption, vapor permeability, capillary behavior, drainage, and the durability of sealants and joint profiles. For humid or coastal projects, specify compatible corrosion-resistant accessories. | Moisture can reduce insulation performance, promote corrosion, and damage facings or adhesives. | Water-absorption test, vapor-permeability data, weathering results, joint details, sealant technical data, and maintenance instructions. | Require a complete moisture-management detail |
| 7. Inspect facing materials | Surface coating, corrosion resistance, and appearance | Confirm facing-metal type and thickness, coating system, color tolerance, gloss, scratch resistance, and suitability for the local environment. Metallic coatings are commonly specified by coating mass or thickness and must be confirmed in the technical datasheet. | Facing durability affects appearance, corrosion protection, cleanability, and service life. | Coating certificate, thickness records, salt-spray or cyclic-corrosion test where relevant, color and gloss specifications, and sample approval. | Approve a production sample before mass manufacture |
| 8. Confirm dimensional quality | Panel thickness, length, width, squareness, flatness, and joint tolerance | Use project-specific tolerances and verify them with an inspection plan. Check tongue-and-groove or joint geometry, effective cover width, edge alignment, and cut-edge treatment. | Dimensional variation can cause leakage, visible misalignment, installation delays, and increased waste. | Approved drawings, dimensional inspection records, calibration certificates, first-article inspection, and pre-shipment photographs. | Set measurable acceptance tolerances |
| 9. Audit supplier capability | Quality-management and production controls | Assess documented incoming-material inspection, batch traceability, process control, calibration, nonconforming-product handling, and corrective-action procedures. ISO 9001 certification can support the review but does not replace product testing. | Consistent production controls reduce variation between samples and delivered batches. | Quality manual, process flow chart, inspection and test plan, calibration records, batch traceability sample, and corrective-action records. | Audit the process and records |
| 10. Validate documentation | Test-report authenticity and scope | Ensure reports identify the tested product, thickness, core density, facings, joint configuration, test date, laboratory, standard, and result. The tested construction must match the proposed project assembly. | A report for a different thickness, core, coating, or joint cannot automatically be applied to the purchased product. | Complete laboratory report, classification document, product datasheet, material certificates, and signed technical declarations. | Check traceability from report to shipment |
| 11. Review logistics | Packaging, container loading, storage, and transport risk | Confirm panel dimensions, package quantity, gross weight, loading method, moisture protection, edge protection, lifting instructions, and maximum storage period. Calculate usable container volume before placing the order. | Incorrect packaging or unsupported stacking can cause dents, distortion, water damage, and avoidable freight costs. | Packing specification, loading plan, package photographs, bill of materials, shipping marks, and storage instructions. | Approve the packing method before shipment |
| 12. Compare total cost | Landed cost and lifecycle value | Compare panel price, accessories, freight, duties, installation labor, cutting waste, maintenance, replacement risk, and expected service conditions. Use the same thickness, performance level, delivery terms, and quantity for every quotation. | The lowest purchase price may not provide the lowest installed or lifecycle cost. | Itemized quotation, harmonized product description, packing list, freight estimate, duty information, warranty terms, and installation-cost assumptions. | Select on verified landed cost |
| 13. Conduct pre-shipment inspection | Batch conformity and visual quality | Inspect random packages for dimensions, surface defects, color consistency, joint fit, edge damage, labels, quantities, and accessories. Confirm the batch number against production and test records. | Pre-shipment inspection identifies problems before international transport and site installation. | Approved inspection checklist, sampling plan, inspection photographs, measurement records, and signed release report. | Release only conforming batches |
| 14. Finalize contract controls | Warranty, remedies, change control, and after-sales support | Define the approved specification, permitted substitutions, inspection rights, replacement obligations, delivery schedule, packaging requirements, warranty exclusions, and response times for technical issues. | Clear contract controls reduce disputes when materials, dimensions, colors, or delivery conditions change. | Signed technical specification, approved drawings, quality plan, warranty document, change-order procedure, and installation manual. | Make the approved specification contractual |
