Fire Rated Rock Wool Sandwich Panel With PU Side Sealing For Roof
Glostar’s fire rated rock wool sandwich panel with PU side sealing for roof is a fully factory-prefabricated roofing system — no on-site core lay-up required. A non-combustible rock wool core delivers strong fire protection, while a PU side-sealed edge design provides anti-cold-bridge performance and excellent overall insulation, high rigidity, effective drainage, and strong anti-negative wind pressure resistance for industrial and commercial roofs.
Description
This fire rated rock wool sandwich panel with PU side sealing for roof is an integrated roof system — the core is fully bonded and edge-sealed at the factory, so there’s no need for on-site core lay-up or field foaming. The rock wool core gives the panel Class-leading fire performance, while a PU strip along both panel edges seals the joint, blocks cold-bridging at the seam, and protects the exposed rock wool from moisture ingress during and after installation.
The result is a roof panel that combines rock wool’s non-combustibility with the airtight, thermally efficient edge detail more commonly associated with PU foam panels — giving designers a single product that satisfies both fire code and energy performance requirements without compromise.
Fixing Methods
The panel is available with two fixing methods to suit different project priorities:
Secret fastening (concealed/hidden fixings): No screws penetrate the panel surface, giving excellent waterproofing and wind resistance.
Through fastening (visible fixings): Delivers better thermal insulation continuity and stronger anti-cold-bridge performance at the fixing point.
Specification
| Insulated Core | Rock wool with PU side sealing |
| Effective Width | 1000mm |
| Thickness | 50 / 75 / 80 / 100 / 120 / 150 / 200mm |
| Exterior Facing Thickness | 0.5mm – 0.8mm |
| Interior Facing Thickness | Square profile: 0.4mm – 0.7mm | Flat profile: 0.5mm – 0.7mm |
| Profile | Flat, square wave |
| Painting | Polyester PE, SMP, HDP, PVDF |
| Galvanizing | Hot-dip zinc, Hot-dip Al-Zn, Hot-dip Zn-Al-Mg |
| Color | Customized |
| Recommended Steel Coil | Baosteel, YIEH PHUI, BlueScope, or equivalent |
Key Advantages
- Fully factory-prefabricated: No on-site core lay-up — the panel arrives ready to install, cutting labor time and site risk.
- Strong fire protection: Non-combustible rock wool core suited to roofs with strict fire-safety requirements.
- PIR side sealing: Seals panel edges against moisture, blocks cold bridging at the joint, and protects the rock wool core from water ingress.
- High rigidity: Delivers strong structural performance across long roof spans.
- Effective drainage: Profile geometry is engineered to shed water efficiently, even on low-slope roofs.
- Strong anti-negative wind pressure resistance: Withstands wind uplift forces common in large industrial and commercial roofing applications.
- Tight overlapping, fast installation: Precision-formed joints speed up on-site assembly and reduce leak risk.
Manufacturing & Quality
Every sandwich panel is roll-formed and core-bonded on automated production lines, with the PU side seal applied under controlled factory conditions to ensure a consistent, reliable edge detail on every unit. Steel substrates can be sourced from leading coil suppliers such as Baosteel, YIEH PHUI, and BlueScope, and panels are quality-checked before shipment to meet international project specifications.
Packaging & Shipping
Product Applications
Frequently Asked Questions
What does "PU side sealing" mean?
What's the difference between secret fastening and through fastening?
Secret (concealed) fastening keeps screws off the visible surface for better waterproofing and wind resistance. Through fastening uses visible screws and offers stronger thermal insulation continuity and anti-cold-bridge performance at the fixing point.