Warehouse roofing decisions involve more variables than most procurement managers realize. Panel weight, wind uplift resistance, span capability, and thermal performance all interact in ways that affect both structural design and long-term operating cost.
Weight Advantage
Insulated aluminum Great Wall panels weigh 10.5–11.5 kg/m² for a 75mm PIR panel with 0.7mm faces. Steel sandwich panels run 18–24 kg/m². On a 10,000m² warehouse roof, the difference is 75,000–125,000 kg — directly reducing structural steel requirements and foundation loads.
Span Capability
| Panel thickness | Max purlin span at 0.5 kPa load | Max purlin span at 1.0 kPa load |
|---|---|---|
| 50mm PIR | 1.8m | 1.2m |
| 75mm PIR | 2.4m | 1.6m |
| 100mm PIR | 3.0m | 2.0m |
Wind Uplift Resistance
Standard Great Wall aluminum panels achieve 1.0–1.5 kPa wind uplift resistance when fixed at 400–600mm centres. For coastal or high-wind locations, specify closer fixing centres and 1.0mm face sheets. Confirm design loads with your structural engineer.
Thermal Performance
| PIR core thickness | U-value (W/m²K) | R-value (m²K/W) |
|---|---|---|
| 50mm | 0.50 | 2.0 |
| 75mm | 0.35 | 2.9 |
| 100mm | 0.25 | 4.0 |
For warehouses in tropical climates, 75mm PIR (U-value 0.35) suits most applications. Cold storage or pharmaceutical warehouses requiring strict temperature control should specify 100mm.
Waterproofing
Great Wall panels use an interlocking male-female profile that eliminates exposed fasteners on the roof surface. With factory-applied butyl tape on all overlaps, the system handles rainfall above 200mm/hour — sufficient for tropical monsoon conditions.
Recommended Specification for Warehouses
- Face sheet: 0.7mm aluminum alloy 3003-H16
- Core: 75mm PIR foam, 42 kg/m³ density
- Coating: PVDF 25 micron outer face
- Color: Light grey or off-white (SRI above 80 for hot climates)
- Fixing: Concealed clips at 600mm centres maximum
Request Technical Support
GSM BuildTech provides detailed technical data sheets, span tables, and CAD drawings for all panel profiles. Our technical team can review your purlin layout and loading requirements and recommend the correct specification. Contact us for a consultation and material quote.
Contact Us for a Quote
📧 Email: sales@insulatedaluminumroof.com
📞 WhatsApp / Phone: +86 155 2274 6824
We respond to all inquiries within 24 hours. Please include your project area (m²), required specification, and delivery port.
Further Reading
We are a China-based manufacturer and exporter of insulated aluminum sandwich panels (PIR/PUR core) for industrial and commercial projects across the Middle East and Southeast Asia. We supply contractors, importers and developers with factory-direct panels, full export documentation (SABER, SGS, Form E) and technical support. Questions on specifications or sourcing? Message our team on WhatsApp or request a quote.
Need a Quote for Your Project?
We are a China factory-direct supplier of insulated aluminum roof and wall panels. Send your area (m2), thickness and destination port for a quote within 24 hours.