Insulated Sandwich Panel System
Rock Wool / PUR / PIR / EPS Fire-Rated Panel
Complete insulated sandwich panel range: rock wool (A-grade fire), PIR/PU, EPS & PUR edge-sealed rock wool. 50-200mm for cold storage & factories. CE certified.
Product Overview
Our insulated sandwich panel range covers every fire rating, thermal performance, and budget requirement. Four core types available: rock wool (mineral fiber, A-grade non-combustible), PIR/PU (polyisocyanurate/polyurethane, best thermal efficiency), PUR edge-sealed rock wool (fire-rated edges with foam core), and EPS (economical option for dry applications).
Rock wool sandwich panels are the preferred choice for fire-rated applications — achieving A-grade non-combustibility with fire resistance up to 2 hours. PUR edge-sealed rock wool panels combine the fire safety of rock wool at the panel joints with the thermal efficiency of polyurethane foam in the core area. PIR panels deliver the highest R-value per thickness, making them ideal for cold storage and temperature-controlled environments.
All panels feature hidden fastener joints, continuous gasket seals, and are compatible with our complete range of trims, flashings, and accessories. Panel widths: 1000mm-1200mm standard. Custom lengths up to 16m. Lead time: 20-25 working days.
Technical Specifications
| Core Types | Rock wool / PIR / PUR / PUR Edge-Sealed Rock Wool / EPS |
| Panel Thickness | 50mm, 75mm, 100mm, 120mm, 150mm, 200mm |
| Steel Skin | 0.4mm — 0.7mm GI / PPGI / Stainless Steel |
| Fire Rating | Rock wool: Grade A (non-combustible), PIR: B1, EPS: B2 |
| U-Value (100mm) | Rock wool: 0.45, PIR: 0.22, EPS: 0.35 W/m²K |
| Panel Width | 1000mm — 1200mm standard |
| Joint Type | Hidden fastener, tongue-and-groove with gasket |
| Acoustic (RW) | Rock wool: 30-35 dB, PIR: 25-28 dB |
| Max Length | Up to 16m continuous panel |
Key Features
Applications
Typical Delivery Timeline
From design approval to site delivery
Engineering Design
Calculation reports, shop drawings, erection manual
1–2 weeksFabrication
CNC cutting, welding, shot blasting, coating
4–6 weeksShipping
Container loading, ocean freight to your port
2–4 weeksSite Erection
Bolt-together assembly with remote guidance
4–8 weeksTotal project timeline: 11–20 weeks from design approval to completed installation. Rush production available.
Why Choose Laotie Steel?
15 years of manufacturing excellence, trusted by buyers in 30+ countries
CE & ISO 9001 Certified
Every product meets EN 1090-1 and ISO 9001:2015 standards. Full mill test certificates (EN 10204 3.1) provided with every shipment. IAF accredited and Made-in-China Supplier Assessed.
5,000 Tons Monthly Capacity
20,000 m² factory with 5 automated production lines. 200+ skilled workers operating 24/7. Whether you need a 500 m² workshop or a 50,000 m² industrial complex, we deliver on time.
30+ Countries Served
Export experience across Southeast Asia, Middle East, Africa, Australia, and South America. We design to your local building code: AS/NZS, BS 5950, EN 1993, AISC, or GB 50017.
Full Engineering Package
Structural calculation reports, detailed shop drawings, and erection manuals included with every order. Our engineers use Tekla, SAP2000, and STAAD.Pro for precision design.
Factory-Direct Pricing
No middleman markup. You buy directly from the manufacturer. Typical savings of 30–50% compared to local fabrication, even after shipping and duties.
15-Year Track Record
Founded in 2009 in Shangqiu, Henan — China's steel manufacturing hub. 500+ completed projects worldwide. Every bolt, plate, and member is labeled and match-marked for rapid assembly.
Frequently Asked Questions
Common questions about insulated sandwich panel system
What core types are available?
Rock wool (Grade A fire), PIR, PU, PUR edge-sealed rock wool, and EPS. Each suited to different applications.
What thickness do I need for cold storage?
Freezer (-25C): 150-200mm. Chiller (0-5C): 100-150mm. Cool room: 80-100mm. PIR recommended for best U-value.
What is PUR edge-sealed rock wool?
A hybrid panel combining fire-safe rock wool at the joints with polyurethane foam core for better thermal efficiency.
What is the maximum panel length?
Up to 16 meters continuous, reducing horizontal joints and installation time.
Are hidden fastener panels available?
Yes. All panel types feature hidden fastener joints with continuous gasket seals for a clean architectural finish.
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Ready to Start Your Project?
Send us your project requirements and drawings. Our engineering team will provide a detailed quotation with structural calculations within 24 hours.