Expanded Polystyrene Sandwich Wall Panel

Product Details

Expandable polystyrene (EPS) sandwich panels, also known as polystyrene foam sandwich panels, are a type of lightweight composite panel with closed-cell polystyrene foam as the core material. Expanded polystyrene sandwich wall panel use color-coated steel sheets as the face panels, which are bonded together under high pressure with a high-strength adhesive to form a lightweight composite panel. Its classic “sandwich” structure integrates load-bearing, thermal insulation, waterproofing, and decorative functions.

Structurally, the upper and lower face panels of expanded polystyrene sandwich wall panel is typically made of 0.3mm–1.2mm thick color-coated steel sheets, galvanized sheets, or aluminized zinc sheets. The core material is flame-retardant polystyrene foam with a density of 18–22 kg/m³, manufactured through automated continuous molding machines under high temperature and pressure, followed by edge trimming and grooving processes.

Type	EPS Sandwich Panels
Density	8/10/12/14/16/18/20kg/m³
Thickness	50/75/100/120/150/200mm
Metal skin thickness	0.4~0.8mm
Panel Effective Width	950/1150mm for wall and 950mm for roof
Skin material	PPGL,PPGI,Stainless steel,aluminum coil
Pre-painted	PE/SMP/HDP/PVDF etc.
Fireproof Grade	B2
Thermal Conductivity	0.042
Temperature Range	-40~90ºC
Length	Max 11.9m or Customized.

Standard thicknesses for EPS sandwich panels range from 50mm to 200mm, with common widths of 950mm, 1000mm, and 1150mm. Lengths can be customized to project requirements. The panels weigh only 10.0–13.6 kg/m², have a thermal conductivity ≤0.039 W/(m·K), and offer approximately 19 dB of sound insulation (75 mm thick).

Expanded polystyrene sandwich wall panel typically have a fire rating of B2 (self-extinguishing) and can be upgraded to B1 (difficult to burn) by using flame-retardant materials. With advantages such as lightweight, high strength, thermal insulation, convenient construction, and economic and environmental friendliness, EPS sandwich panels are widely used in various locations including large industrial plants, steel structure warehouses, logistics warehouses, cold storage facilities, temporary buildings, and prefabricated houses.

Advantages of Expandable Polystyrene Sandwich Panels

Lightweight and High Strength: Weighing only 10–13.6 kg/m², effectively reducing the load on steel structures and foundation costs.

Excellent Thermal Insulation: The closed-cell EPS core material has a thermal conductivity as low as 0.039 W/(m·K), resulting in significant energy savings.

Highly Efficient Construction: Modular panel design allows for dry on-site installation, reducing construction time by over 40% compared to traditional wet methods.

Economical and Durable: Significant material cost advantages; overall service life can reach over 35 years.

Selection Tips and Compliance Explanation

When selecting materials for project construction, two points require special attention:

• First, EPS sandwich panels are typically classified as B2-class combustible materials, releasing toxic gases at high temperatures. They must not be used in densely populated areas or on the exterior walls of high-rise buildings. If Class A fire resistance requirements are involved (such as in chemical workshops, clean areas for food processing, and high-rise public buildings), rock wool sandwich panels or inorganic core composite panels should be prioritized according to local fire safety regulations.
• Second, proper sealing of panel joints is crucial during installation to prevent moisture intrusion that could lead to core material aging and panel corrosion. This is especially important in high-humidity environments or cold chain logistics warehouses, where the quality of installation directly impacts panel lifespan.

Globally, with the continued promotion of prefabricated buildings and green energy-saving concepts, expandable polystyrene sandwich panels, with their mature cost-effectiveness, will continue to hold a significant market position in budget-sensitive projects.

We earn the long-term trust of global clients through unparalleled efficiency and relentless pursuit of quality excellence.

Production Workshop Display

The company has a modern production base of over 8,000 square meters, equipped with a steel structure welding workshop, two Italian‑imported sandwich panel production lines, three complete house production lines and an intelligent assembly system. The annual steel structure capacity reaches 150,000 tons, with a daily output of 3,000 square meters of high‑end sandwich panels and 200 sets of modular houses.

Product Packaging & Shipping

Our packing and shipping services offer customized, robust transportation solutions for every product category, ensuring your goods arrive safely worldwide. Steel structural components are packed with sturdy steel frames, forming stable transport units that effectively withstand the bumps and pressure of long-distance sea and land transport. Sandwich panels and container houses are fully wrapped with high-quality protective films, providing moisture, dust, and scratch protection while fully preserving the coating and appearance of the panels. We have deep expertise in export logistics; from packing methods to container loading, every step is professionally optimized to provide you with a worry-free and reliable delivery experience.

Why Choose Us?

• Compliance guaranteed: Complete international certifications, compatible with national standards, reducing application and acceptance risks.
• Cost controllable: Chinese supply and prefabricated construction result in overall cost savings of 15%-25%.
• Schedule guaranteed: BIM collaboration and factory prefabrication enable rapid production and a competitive market advantage.
• Reliable quality: Export-grade processes and rigorous testing ensure both structural safety and durability meet standards.

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