What Are EPS Wall Panels?

EPS (Expanded Polystyrene) wall panels are prefabricated building components featuring a lightweight EPS foam core sandwiched between durable facings. Typical facings include:

• Cement board

• Fiber-reinforced cement

• Metal sheets

• Gypsum board

The EPS core provides thermal insulation, while the facings deliver structural support and surface protection. These EPS sandwich panels are suitable for both load-bearing and non-load-bearing applications, depending on design and facing materials.

Key Technical Features

1. Thermal Insulation

• Thermal conductivity (λ): 0.032–0.038 W/m·K

• Typical thickness: 50–150mm

• Example: 100mm panel ≈ R-3.0 to R-3.1 (m²·K/W)

Helps achieve energy-efficient building envelopes compliant with codes such as ASHRAE 90.1 and IECC

2. Mechanical Strength

• EPS density: 15–30 kg/m³

• Compressive strength: 80–150 kPa (core only)

Facings enhance bending and impact resistance

3. Fire Performance

• EPS is combustible but can be enhanced with fire-retardant additives

• Fire-resistant facings improve safety ratings

• Compliant with ASTM E84, EN 13501-1, or local regulations

4. Moisture & Vapor Resistance

• Low water absorption (<1%) reduces risk of mold and degradation

•  Proper sealing and vapor barriers are recommended for exterior or humid applications

Standards & Compliance

• ASTM C578: EPS thermal insulation properties

• EN 13163: European standard for EPS insulation

• ASTM E84: Surface burning characteristics

• ISO 9001: Manufacturing quality management

Local and international building codes for safety and compliance

Installation Guidelines

Structural Design

• Panels must account for wind, seismic loads, and live loads

• Select facing materials and core thickness based on project requirements

Best Practices

• Ensure plumb, square substructures

• Use compatible fasteners and adhesives

• Seal joints with fire-resistant materials

• Include thermal breaks and expansion joints

Safety

• Use PPE during cutting and installation

• Ensure proper ventilation to minimize dust

• Follow waste management protocols for EPS scraps

Performance Highlights

• Can reduce heating/cooling energy consumption by up to 35%

• 100mm EPS core panels with cement facings can withstand compressive loads >200 kPa

• Fire-retardant systems achieve Class B or better in flame spread and smoke tests

Conclusion

EPS wall panels are lightweight, thermally efficient, and versatile, suitable for residential, commercial, and industrial projects. For optimal performance, consult construction engineers and manufacturers to ensure panels meet project-specific requirements, safety standards, and local regulations.