Corrugated insulated roof panels are profiled metal-skinned sandwich panel systems engineered for industrial, commercial, and agricultural roofing where both weathertightness and thermal performance are required. The outer face is a trapezoidal corrugated pre-painted galvanized steel (PPGI) or pre-painted galvalume (PPGL) sheet at 0.3-0.6mm thickness, roll-formed into ribs that accelerate rainwater discharge and increase sectional stiffness.
The polyurethane (PU) foam core delivers superior thermal insulation with a density of 40-45 kg/m³ and thermal conductivity of 0.022-0.025 W/(m·K), outperforming conventional materials of equal thickness. For cost-sensitive projects with moderate insulation demands, expanded polystyrene (EPS) cores are offered at 12-30 kg/m³ density with thermal conductivity of 0.035-0.041 W/(m·K), balancing budget and energy performance.
Standard panel thickness ranges from 50mm to 150mm, with 50mm, 75mm, and 100mm as the most common configurations for warehouse and factory roofing. Panels come in effective widths of 950-1000mm and custom lengths up to 11,800mm to fit container shipping constraints. Adjacent panels are joined by overlapping the corrugated profiles and fastening with self-tapping screws fitted with EPDM rubber washers.
These corrugated insulated panels serve steel-structure factories, logistics warehouses, agricultural barns, sports halls, and commercial complexes. PU-core panels achieve B1 or B2 fire classification per GB 8624 and EN 13501-1, while EPS cores typically meet B2 requirements. The corrugated profile supports a minimum roof pitch of 5° for reliable drainage and long-term weatherproofing.
Your Trusted Manufacturer for Corrugated Insulated Panel
RaxPanel is a direct manufacturer of corrugated insulated roof panels based in Hebei, China, with over 15 years of continuous production experience. Our in-house R&D, roll-forming, and foaming lines deliver consistent corrugated profiles, bonding strength, and dimensional accuracy for industrial and agricultural roofing projects worldwide.
With a daily production capacity exceeding 1,700 m² and exports to more than 50 countries and regions, RaxPanel combines scale with strict quality control to meet GB 8624 and EN 13501-1 fire classifications. Every panel undergoes verified lamination and bonding to support reliable weather performance over a long service life.
- PPGI/PPGL corrugated outer skin at 0.3-0.6mm with trapezoidal rib profile.
- PU foam core at 40-45 kg/m³ with thermal conductivity of 0.022-0.025 W/(m·K).
- Standard thicknesses of 50mm, 75mm, 100mm, and 150mm with 950-1000mm effective width.
- B1/B2 fire rating per GB 8624 and EN 13501-1; minimum roof pitch of 5°.
| Parameter | Value |
|---|---|
| Skin Material | PPGI / PPGL / Galvanized Steel |
| Skin Thickness | 0.3-0.6 mm |
| Core Material | PU foam / EPS |
| Core Density | PU: 40-45 kg/m³; EPS: 12-30 kg/m³ |
| Thermal Conductivity | PU: 0.022-0.025 W/(m·K); EPS: 0.035-0.041 W/(m·K) |
| Thickness Range | 50-150 mm (standard: 50, 75, 100, 150 mm) |
| Effective Width | 950-1000 mm |
| Max Length | Up to 11,800 mm |
| Profile Type | Trapezoidal corrugated rib |
| Joint System | Overlap with self-tapping screws + EPDM washers |
| Min Roof Pitch | ≥ 5° |
| Fire Resistance | B1/B2 (PU); B2 (EPS) per GB 8624 / EN 13501-1 |
| Temperature Range | -50°C to +150°C |
| Coating | PE / SMP / HDP / PVDF |
Corrugated Insulated Panel Buying Guide & FAQ
Selecting the right corrugated insulated roof panel requires understanding core performance, profile geometry, joint integrity, and fire compliance. This guide answers the most common questions from contractors, developers, and warehouse owners evaluating corrugated sandwich panels for industrial and agricultural roofing applications.
1. What is the difference between PU and EPS core corrugated roof panels?
PU foam cores achieve thermal conductivity of 0.022-0.025 W/(m·K) at 40-45 kg/m³ density, delivering roughly twice the insulation performance of EPS for the same thickness. EPS cores provide 0.035-0.041 W/(m·K) at 12-30 kg/m³, a cost-effective option for buildings with moderate thermal demands and limited budgets.
2. What panel thickness do I need for a warehouse roof?
For typical warehouse roofing in temperate climates, 50mm or 75mm panels balance cost and insulation. For cold storage adjacency, high-temperature environments, or energy-efficient buildings, 100mm or 150mm panels are recommended, reducing heat transfer and lowering long-term HVAC operating costs.
3. What is the minimum roof slope for corrugated insulated panels?
A minimum roof pitch of 5° is recommended to ensure reliable rainwater drainage along the corrugated ribs and prevent ponding. Lower slopes increase the risk of water infiltration at overlaps; in regions with heavy rainfall, a steeper pitch combined with sealed lap joints provides the best long-term weatherproofing.
4. How are corrugated insulated panels joined and waterproofed?
Adjacent panels overlap along the corrugated profile and are fastened with self-tapping screws equipped with EPDM rubber washers. The washers compress to form a watertight seal around each fastener, while the overlap combined with sealant at end laps blocks wind-driven rain and prevents air infiltration.
5. What fire ratings are available for corrugated insulated panels?
PU-core corrugated panels are formulated to meet B1 or B2 classification per GB 8624 and EN 13501-1, with B1 offering enhanced flame retardancy. EPS-core panels typically achieve B2. For projects requiring non-combustible construction, rock wool core alternatives rated A1 can be supplied on request.