Polystyrene Foam Sandwich Roof Panel

Detalles Del Producto

Polystyrene foam sandwich roof panel is lightweight roofing cladding materials made with expandable polystyrene (EPS) foam as the core material, covered with color-coated steel sheets or galvanized steel sheets on both sides, and bonded together under heat and pressure in a continuous molding machine using a high-strength adhesive. Their classic “sandwich” composite structure combines load-bearing, thermal insulation, waterproofing, and decorative functions, making them widely applicable to roofing systems for large-span industrial plants, steel structure warehouses, logistics centers, and other buildings.

Product Structure

Polystyrene foam sandwich roof panel is typically composed of a three-layer composite structure:

1. The top and bottom panels are made of color-coated steel sheets, galvanized steel sheets, or stainless steel sheets, with a thickness generally ranging from 0.3 to 0.6 mm, serving waterproofing, durability, and decorative purposes.

2. The core material is closed-cell polystyrene (EPS) foam with a density ranging from 10 to 25 kg/m³. It is made from expandable polystyrene beads through multiple processes including pre-foaming, curing, molding, drying, and cutting, and features lightweight, thermal insulation, and low water absorption.

3. The panel and core material are bonded together under high temperature and pressure using a two-component polyurethane adhesive to form a stable integral structure.

Product Parameters

Common specifications and technical parameters of polystyrene foam roofing sandwich panels are as follows:

Parámetro	Typical Range / Value
Panel Thickness	50mm – 200mm (common: 50, 75, 100, 120, 150, 200mm)
Effective Width	950mm, 1000mm, 1150mm, etc.
Panel Length	≤ 12.5m (customizable per project)
Steel Sheet Thickness	0.2 – 0.8mm (color coated steel sheet / galvanized sheet)
Core Density	18 – 22 kg/m³ (standard compliant)
Thermal Conductivity (λ)	0.038 – 0.043 W/(m·K)
Thermal Transmittance (Uc)	0.42 W/(m²·K) (for 80mm thickness) ~ 0.14 W/(m²·K) (for 250mm thickness)
Fire Performance Class	Class B2 (combustible) or flame-retardant treated up to Class B1 (difficult to ignite)
Peel Performance	Bonded area ≥ 85% of total interface
Adhesive Strength	≥ 0.10 MPa (in compliance with GB/T 23932-2025)
Minimum Roof Slope	≥ 4% (approx. 2.3°)
Service Temperature Range	-40°C to +90°C
Self Weight	approx. 8 – 13 kg/m² (including steel sheets and core)

Product Advantages

Polystyrene foam roof sandwich panels have become the mainstream material for lightweight steel structure roofs due to the following core advantages:

• Ultra-lightweight: The weight of the panels is approximately 1/20 to 1/30 of that of a concrete roof, significantly reducing the load on the main steel structure and foundation costs.
• Thermal Insulation: The thermal conductivity of the EPS core material is 0.038–0.043 W/(m·K). Its excellent closed-cell structure effectively blocks heat transfer, resulting in significant energy savings.
• Multifunctional: The panels integrate load-bearing, insulation, waterproofing, and decoration, eliminating the need for secondary finishing and simplifying roof structure.
• Fast Construction: Modular design allows for dry on-site installation, eliminating wet work and reducing the construction period by over 40% compared to traditional cast-in-place roofs.
• Economical and Durable: Significantly cost-effective materials; the galvanized steel panels undergo anti-corrosion treatment, ensuring an overall service life of 15-20 years or more.

Main Applications

Polystyrene foam sandwich roof panel due to their lightweight, high strength, and excellent thermal insulation properties, are widely used in various building roofing systems:

Industrial Buildings: Roofing panels for steel structure factories, processing workshops, logistics warehouses, car dealerships, and large exhibition halls.

Public Facilities: Roofing systems for large-span buildings such as stadiums, conference centers, theaters, and waiting rooms.

Temporary and Modular Buildings: Roofing cladding for prefabricated houses, modular houses, and container houses.

Cleanrooms and Special Purpose Buildings: Thermal insulation factories, cleanrooms, cold storage facilities, and other places with high requirements for thermal insulation performance.

Existing Roof Renovation: Covering existing purlins; suitable for the renovation and upgrading of old trapezoidal roofs.

Selection and Safety Tips

When selecting and applying polystyrene foam sandwich roof panel, the following points should be noted:

Firstly, the combustion performance of polystyrene core material is usually B2 (combustible). It will burn rapidly and release a large amount of toxic smoke when exposed to an open flame, and should not be used in roofing systems of densely populated places (such as hospitals, schools, and shopping malls) or high-rise buildings. If Class A fire protection requirements are involved (such as in chemical workshops and clean areas for food processing), rock wool sandwich panels or composite panels with non-combustible core materials should be prioritized according to local fire safety regulations.

Secondly, in accordance with the national standard GB/T 23932-2025, qualified products with a core material density ≥18kg/m³ and a metal panel thickness ≥0.5mm should be selected to ensure the thermal insulation performance, structural strength, and safety of the panels.

Thirdly, a slope of ≥4% should be maintained during roof installation, and the joints between panels should be properly sealed to prevent core material aging and panel corrosion due to water accumulation or moisture intrusion. Especially in high-humidity climates, the quality of installation details directly affects the service life of the roof.

In conclusion, polystyrene foam sandwich roof panel, with their mature cost-effectiveness and lightweight, efficient installation characteristics, are an ideal choice for roofing systems in conventional industrial plants and storage facilities, and will continue to occupy an important market position in high-cost-performance projects.

Ganamos la confianza a largo plazo de los clientes globales a través de la eficiencia sin paralelo y la búsqueda incesante de la excelencia de calidad.

Pantalla de taller de producción

La empresa cuenta con una moderna base de producción de más de 8.000 metros cuadrados, equipado con un taller de soldadura de estructura de acero, dos líneas de producción de paneles de sándwich importados por Italia, tres líneas de producción de casas completas y un sistema de montaje inteligente. La capacidad anual de estructura de acero alcanza 150.000 toneladas, con una producción diaria de 3.000 metros cuadrados de paneles sándwiches de alta gama y 200 conjuntos de casas modulares.

Embalaje del producto & Envío

Nuestros servicios de embalaje y envío ofrecen soluciones de transporte personalizadas y robustas para cada categoría de productos, asegurando que sus mercancías lleguen de forma segura a todo el mundo. Los componentes estructurales de acero están llenos de marcos de acero robustos, formando unidades de transporte estables que resisten eficazmente los golpes y la presión del transporte marítimo y terrestre de larga distancia. Los paneles de sándwich y las casas de contenedores están completamente envueltos con películas protectoras de alta calidad, proporcionando protección de humedad, polvo y arañazos, preservando completamente el revestimiento y la apariencia de los paneles. Tenemos una gran experiencia en logística de exportación; desde métodos de embalaje hasta carga de contenedores, cada paso es optimizado profesionalmente para proporcionarle una experiencia de entrega sin preocupaciones y confiable.

¿Por qué elegirnos?

• Cumplimiento garantizado: Certificaciones internacionales completas, compatibles con las normas nacionales, reduciendo los riesgos de aplicación y aceptación.
• Control de costos: suministro chino y construcción prefabricada resultan en ahorros de costes globales del 15%-25%.
• Programa garantizado: La colaboración de BIM y la prefabricación de fábrica permiten una rápida producción y una ventaja competitiva del mercado.
• Calidad fiable: Los procesos de exportación y pruebas rigurosas garantizan tanto la seguridad estructural como la durabilidad cumplen con los estándares.

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