Product Overview
Lightweight EPS Sandwich Panel is a prefabricated insulation panel made of two galvanized steel sheets bonded to an expanded polystyrene (EPS) foam core.
It is used as wall and roof enclosure material for steel structure buildings that require fast installation, controlled cost, and basic thermal insulation performance.
Compared with traditional masonry walls, EPS sandwich panels reduce construction time, simplify installation work, and lower structural load requirements.
Technical Range
|
Parameter |
Specification |
|
Panel Type |
EPS Sandwich Panel (Non-load-bearing enclosure system) |
|
Thickness |
50 mm / 75 mm / 100 mm / 150 mm |
|
Effective Width |
950 mm / 1000 mm |
|
Length |
Customized (based on transport and project requirement) |
|
Steel Face Sheet |
0.3 – 0.8 mm pre-painted galvanized steel |
|
Surface Coating |
PE / PVDF / SMP (optional based on project environment) |
|
Core Material |
Expanded Polystyrene (EPS) rigid foam |
|
EPS Density |
8 – 20 kg/m³ |
|
Thermal Conductivity |
0.034 – 0.041 W/m·K |
|
Fire Performance |
Standard EPS / B1 / B2 (fire-retardant grade optional) |
|
Joint System |
Tongue-and-groove / concealed overlap system |
|
Color Range |
RAL standard colors available |
|
Application Position |
Wall & roof enclosure system for steel structure buildings |
Key Advantages
Rapid Construction & Low Installation Cost
Zero Curing Time: The pre-engineered dry-construction system eliminates on-site wet trade processes, vastly shortening project timelines.
Simplified Assembly: Interlocking panels are secured to the steel framework using self-tapping screws and sealed with PU or butyl tape. No heavy lifting machinery or specialized equipment is required.
Optimized Total Project Budget
Reduced Structural Mass: The lightweight profile significantly reduces dead loads, allowing engineers to optimize and lower the steel frame's foundational and structural costs.
Lower Labor Costs: Simplified installation processes sharply decrease on-site labor requirements and hours.
High-Efficiency Freight & Handling
Optimized Packing: High volume-to-weight ratio allows for maximized container loading density, effectively lowering ocean freight costs per square meter.
Easy On-Site Logistics: Lightweight composition reduces material handling difficulty and prevents on-site transit damage.
All-Weather Thermal Performance
Continuous Insulation Layer: Prevents thermal bridging, effectively reducing heat gain in tropical climates and mitigating heat loss in cold regions, lowering long-term building operational energy costs.
Typical Engineering Applications
Our custom-cut panels adapt perfectly to diverse building types requiring rapid envelope enclosure:
Industrial Enclosures
Steel structure warehouses, logistics distribution centers, manufacturing workshops.
01
Prefabricated Modular Units
Worker dormitories, temporary site offices, modular housing systems.
02
Commercial & Storage
Exhibition halls, cold/ambient storage facilities, temporary retail structures.
03
Agricultural Buildings
Climate-controlled farm sheds, grain storage warehouses, modern greenhouses.
04
Emergency Structures
Disaster relief shelters, temporary medical units, mobile accommodation.
05
Panel Structure & Material Composition
EPS Sandwich Panel is made of three bonded layers: two steel sheets and an EPS foam core. The structure is designed for strength, insulation, and lightweight performance in steel building systems.
Steel Sheet (Outer & Inner Layer)
Material: Galvanized steel or pre-painted steel (PPGI)
Zinc coating: 60–275 g/m²
Surface: Smooth or color-coated
Function:
Provides surface protection, weather resistance, and basic structural strength.
EPS Core (Insulation Layer)
Material: Expanded Polystyrene (EPS)
Density: 8–20 kg/m³
Function:
Provides thermal insulation and reduces overall panel weight.
Bonding Layer
Factory lamination under controlled pressure
Function:
Ensures firm bonding between steel sheets and EPS core for stable performance during transport and installation.
EPS vs PU vs Rockwool
|
Factor |
EPS |
PU |
Rockwool |
|
Cost |
Lowest |
Medium |
Highest |
|
Insulation |
Good |
Excellent |
Good |
|
Fire Resistance |
Limited |
Medium |
High |
|
Weight |
Very light |
Light |
Heavy |
|
Application |
Standard industrial buildings |
Cold storage / premium |
Fire-sensitive buildings |
Export Quality Control
Wanxiang maintains a strict Quality Management System for all international shipments to ensure consistency across bulk production batches:
Material Inspection
Comprehensive testing of steel coil mechanical properties and zinc coating mass before roll-forming.
Density Stabilization
Continuous monitoring of the EPS pre-foaming process to ensure uniform core density.
Adhesion Control
Automated continuous lamination under synchronized pressure prevents delamination.
Dimensional Tolerance
Strict geometric validation (length, width, thickness, and squareness) before final packing.
Customization Options
Panel thickness (50–150 mm)
RAL color steel sheets
Eps density selection
Flame-retardant eps option
Custom cutting according to drawings
Surface profile (flat / embossed)
Why Choose Wanxiang
Stable Production System
Controlled manufacturing process ensures consistent quality across bulk orders.
Export Packaging Standard
Designed for long-distance sea freight protection.
Engineering-Based Production
Panels are produced based on project requirements, not fixed retail sizes.
Flexible Specification Control
Thickness, coating, and EPS density can be adjusted according to project design.
Certificates
FAQ
Q: Can EPS sandwich panels be used for permanent buildings?
A: Yes. They are widely used in industrial and prefabricated building systems when installed with steel structures.
Q: Are they suitable for different climates?
A: Yes. EPS insulation performs well in both hot and cold regions when properly designed.
Q: Can production follow project drawings?
A: Yes. Panels can be manufactured and cut according to engineering drawings.
Q: What is the service life?
A: Typically 15–30 years depending on environment and installation quality.
Q: Is fire-retardant EPS available?
A: Yes, flame-retardant EPS can be supplied for safety-sensitive projects.
Q: How are panels installed?
A: They are fixed with screws and sealed at joints using PU or butyl sealing materials.
Request a Technical Proposal
Send us:
Project drawings or layout
Required thickness and insulation needs
Project location
We will provide a technical solution and quotation within 24 hours.
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