White EPS Sandwich Panel
Waterproof: The board structure is tight and has good waterproof performance.
Sound insulation: The porous structure of the EPS core can effectively absorb sound waves.
Energy saving: The thermal insulation performance helps to reduce building energy consumption and achieve energy saving goals.
Economical and practical: The cost is relatively low, the cost-effectiveness is high, and it is suitable for large-scale applications, such as industrial plants, warehouses, cold storage, temporary buildings, etc.
Product Introduction
These panels not only provide outstanding heat insulation but also possess remarkable fire - resistant properties, guaranteeing both safety and comfort within your building. Their design, which is both lightweight and durable, streamlines the installation and transportation processes. As a result, they are an ideal choice for a wide range of projects, including residential homes, commercial buildings, and industrial facilities.
Product Specifications
I will show you the diverse choices that the products bring to customers from the perspectives of rich product types, different specifications and parameters, to meet the needs of different scenarios.
Panel effective width | Roof:950/960mm |
Wall:950/1150mm | |
Steel sheet thickness | 0.40~0.70mm |
Panel thickness | 50/75/100/150/200mm |
EPS density | 12-14kg/m³ |
Color | As per RAL or customized |
Coating | PE,SMP,HDP,PVDF |
Steel type | PPGL,PPGI steel/Aluminum sheet/Stainless steel sheet |
Length limitaion | Max 5.9m for 20FT |
Max 11.9m for 40FT | |
Joint way | Hidden screws type |
Fire proof | B1/B2 |
Advantage | Waterproof |
Resistances of heat-transfer process | 0.035-0.05w/m·k |
Quality Assurance
These panels not only provide outstanding heat insulation but also possess remarkable fire - resistant properties, guaranteeing both safety and comfort within your building. Their design, which is both lightweight and durable, streamlines the installation and transportation processes. As a result, they are an ideal choice for a wide range of projects, including residential homes, commercial buildings, and industrial facilities.
A White EPS Sandwich Panel is a lightweight, highly insulated construction material composed of an expanded polystyrene (EPS) core bonded between two outer metal or composite facings—typically color-coated galvanized steel or aluminum. These panels are widely used in industrial, commercial, and residential buildings due to their excellent thermal insulation, fast installation, and cost-effectiveness.
This technical article offers a detailed, SEO-optimized exploration of white EPS sandwich panels, covering material composition, performance characteristics, engineering principles, applicable standards, installation guidance, and frequently asked questions. The goal is to provide builders, architects, engineers, and procurement professionals with accurate, actionable information to support informed decision-making.
What Is a White EPS Sandwich Panel?
A White EPS (Expanded Polystyrene) Sandwich Panel is a prefabricated wall, roof, or partition panel with the following layered structure:
Core: Rigid EPS foam, typically white, with closed-cell composition
Facings: White-coated galvanized steel (PPGI), aluminum, or other durable cladding
Adhesive Bonding: High-performance polyurethane or epoxy adhesives for permanent lamination
These panels are commonly used in:
Cleanrooms
Warehouses
Prefabricated buildings
Cold storage
Modular construction
⚙️ Engineering Principle: EPS provides thermal resistance through its closed-cell foam structure, reducing conductive and convective heat flow. Bonding with steel facings increases mechanical strength and fire containment.
Core Materials and Properties
1. EPS Core (Expanded Polystyrene)
| Property | Typical Value Range |
|---|---|
| Density | 12–22 kg/m³ |
| Thermal Conductivity | 0.030–0.038 W/m·K |
| Water Absorption (by volume) | <2% |
| Fire Behavior | B2 or B1 class (EN 13501-1) |
| Compression Strength | ≥ 100 kPa (at 10% deformation) |
PPGI (Prepainted Galvanized Iron) – Standard choice, corrosion-resistant
Aluminum (for lightweight or coastal use)
Stainless Steel (for high-hygiene environments)
Surface coatings are typically polyester, PVDF, or SMP, with thicknesses of 0.4–0.8 mm.
Key Features and Advantages
✅ Thermal Insulation
EPS's low thermal conductivity reduces heating/cooling loads.
Ideal for temperature-controlled facilities.
✅ Lightweight Construction
Density as low as 12 kg/m³ allows for fast, cost-effective handling and installation.
✅ Sound Insulation
EPS reduces airborne noise by 20–30 dB, depending on thickness and installation.
✅ Moisture and Corrosion Resistance
Outer panels resist corrosion in humid environments.
EPS is water-resistant and prevents condensation inside wall assemblies.
✅ Structural Stability
Good load-bearing performance for cladding, partition, or non-load-bearing walls.
Compressive and flexural strength can be engineered by panel thickness and core density.
✅ Fire Performance
EPS can meet Class B2/B1 fire classifications with fire retardant additives.
For higher fire safety, consider combining with fire-resistant coatings or switching to mineral wool cores.
Standard Sizes and Technical Parameters
| Parameter | Specification Range |
|---|---|
| Width | 950 mm, 1000 mm (standard) |
| Length | Up to 12 meters (customizable) |
| Thickness | 50 mm, 75 mm, 100 mm, 150 mm, 200 mm |
| Surface Thickness | 0.4 mm – 0.8 mm (each side) |
| Insulation Core Density | 12–22 kg/m³ |
| U-value (thermal resistance) | 0.35 – 0.20 W/m²·K (depending on thickness) |
| Bending Strength | > 0.5 kN/m² |
Regulatory Standards and Compliance
| Standard | Relevance |
|---|---|
| EN 14509 (EU) | Self-supporting double skin metal faced insulating panels |
| ASTM C578 (US) | Specification for EPS thermal insulation |
| ISO 9001 / ISO 14001 | Quality and environmental management certification |
| EN 13501-1 | Fire classification (B2/B1 ratings for EPS) |
| GB/T 23932 (China) | Sandwich panels with EPS/PU cores |
| FM Approvals / UL 723 | Optional for insurance-compliant fire safety |
| RoHS / REACH | Ensures compliance with chemical safety in coatings and adhesives |
Application Scenarios
| Sector | Recommended Use | Notes |
|---|---|---|
| Warehouses | Wall and roof panels | Lightweight, fast installation |
| Cold Storage | Wall partitions and ceilings | Use 100–150 mm thickness for better insulation |
| Modular Housing | External/internal wall systems | EPS offers lower cost and good energy efficiency |
| Cleanrooms | Interior partitions | Pair with PPGI or stainless steel facings |
| Temporary Buildings | Office containers, site housing | Quick assembly and disassembly |
Installation Guidelines and Precautions
Panel Installation
Lay panels horizontally or vertically, depending on structural design.
Use interlocking tongue-and-groove joints or concealed fasteners for aesthetics.
Apply butyl tape/sealant at joints to prevent air and moisture infiltration.
Fastening
Use self-tapping screws with sealing washers.
Fix to cold-formed steel structures or light-gauge frames.
Handling and Storage
Store panels flat on pallets, avoid direct contact with sunlight or water.
Use non-metallic straps for lifting to avoid denting metal surfaces.
Fire Safety Note
EPS is combustible without additives. In high-risk zones (exits, kitchens), use with fire barriers, non-combustible facings, or replace with mineral wool panels.
Frequently Asked Questions (FAQs)
Q1: Is EPS sandwich panel waterproof?
A: Yes. The EPS core resists water absorption (<2%), and the outer metal skins provide full protection against moisture ingress. Proper sealing at joints is essential.
Q2: Can EPS sandwich panels be used for roofing?
A: Yes. With a minimum thickness of 75 mm and appropriate structural supports, EPS panels can be used for sloped roofs, especially in light industrial buildings.
Q3: What’s the difference between EPS and PU sandwich panels?
A: PU (polyurethane) panels have better thermal insulation but are heavier and costlier. EPS is lighter, more economical, and easier to recycle.
Q4: Are EPS panels fireproof?
A: EPS is flammable but can be treated to meet B1/B2 fire standards. For higher fire-resistance requirements, consider mineral wool sandwich panels.
Q5: How long do EPS panels last?
A: With proper installation and maintenance, EPS sandwich panels can last 20–30 years. Surface coatings should be monitored for corrosion and repainted as needed.
