The smartest moment to catch a quality problem is before the container ships – and before you pay the balance. A pre-shipment inspection, whether by SGS, Intertek or your own agent, verifies the Great Wall panels match what you ordered. Here is exactly what to check.
1. Dimensions
- Panel thickness matches order (measure several panels, not one)
- Panel length and width within tolerance
- Great Wall joint profile correct and consistent
- Panels straight – no bowing or twist
2. Core Quality
- Core density meets spec (≥42 kg/m³ for PIR) – check the test report and a cut sample
- Foam fully bonded to both faces – no voids or delamination
- Even foam distribution across the panel
3. Aluminum Face & Coating
- Face gauge matches order (e.g. 0.5mm) – measure with a gauge
- Coating type and color correct (PVDF, correct RAL)
- Coating thickness ~25 microns (use a coating thickness meter)
- No scratches, dents or color variation between panels
4. Packing
- Protective film intact on both faces
- Foam/edge protection to prevent transit damage
- Panels crated or banded to survive ocean shipping
- Quantity matches the packing list
5. Documents
- Commercial invoice & packing list match the goods
- Material test reports (alloy, density, thermal conductivity)
- Certificate of origin / Form E (for ASEAN 0% duty)
- SABER documents (for Saudi Arabia)
Tie your 70% balance payment to a passing inspection report. A reputable Great Wall panel supplier welcomes third-party inspection – reluctance to allow it is itself a warning sign.
Request a Quote
GSM BuildTech manufactures and exports insulated aluminum Great Wall roof and wall panels from China to the Middle East and Southeast Asia. Send your area (m²), thickness, and destination port for a 24-hour quote.
WhatsApp: +86 155 2274 6824 | Get a Quote
Related: Great Wall panel specs & pricing · China supplier page · Download spec sheet (PDF)
Popular guides & regions: great wall aluminum panel specification guide · choosing an insulated panel supplier in Saudi Arabia · insulated roof panels in Abu Dhabi · insulated roof panels in Jubail
Related guides: insulated panels for cold storage · insulated aluminum roof panel supplier · China insulated aluminum panel manufacturer · insulated aluminum roof panel price
WhatsApp Quote