Rock Wool Roof Sandwich Panel
Fire resistance: Rock wool is made of minerals such as basalt and is a Class A non-combustible material. It can effectively prevent the spread of fire and improve building safety.
Thermal insulation: Rock wool has a low thermal conductivity, which can effectively reduce heat transfer, improve building insulation effect, and reduce energy consumption.
Sound insulation: The porous structure of rock wool can absorb sound waves and reduce noise transmission, and is suitable for places where sound insulation is required.
Corrosion resistance: Rock wool has stable chemical properties, is resistant to acid and alkali corrosion, is suitable for a variety of environments, and has a long service life.
High compressive strength: Rock wool has a tight structure and good compressive resistance, and is suitable for occasions that require load-bearing.
Product Introduction
Roof Rock Wool Sandwich Panels, crafted from high strength materials, are top tier roofing options. Their Class A non - combustible rock wool cores grant remarkable fireproof, heat insulating, and sound insulating qualities, along with a high fire resistance limit, ensuring superior fire safety for rooftops. Lightweight yet sturdy enough to endure various weather conditions, they reduce the load on roof structures. Ideal for industrial plant, civil building, public facility, and clean workshop rooftops, they are easy to install, eco - friendly, and durable. Thus, they are the perfect choice for rooftop fireproofing, energy saving, and heat preservation in modern roofing projects.
Product Specifications
Effective width | Wall panel: 950mm |
Roof panel: 960mm | |
Material | Color Steel Sheet |
Rock wool board | |
Structure | Upper and lower layer: color steel sheet |
Middle layer: Rock wool board | |
Thickness | Color steel sheet: 0.5~0.8mm |
Rock wool board: 50mm, 75mm, 100，150mm | |
Rock wool Density | 120kg/m³ |
Lifetime | 20~35 years |
Features | Heat Insulation, light weight, quick installation,waterproof, fireproof, soundproof, energy-saving,environmental friendly, |
Lap Way
There are multiple ways to overlap sandwich panels. Options range from a seamless overlap with concealed nails, to a 20 - millimeter seam overlap featuring concealed nails, a 10 - millimeter seam overlap with concealed nails, and the tongue - and - groove overlap.
Rock wool roof sandwich panels have become a cornerstone in modern building envelope design, offering superior thermal insulation, fire resistance, and structural strength. These composite panels are widely used in industrial, commercial, and residential roofing systems to enhance energy efficiency and safety. This article presents a detailed, technically oriented overview of rock wool roof sandwich panels, focusing on their material composition, engineering principles, compliance with industry standards, installation considerations, and relevant regulations.
What Are Rock Wool Roof Sandwich Panels?
A rock wool roof sandwich panel is a multilayered construction element comprising:
Outer and inner metal facings (commonly galvanized steel or aluminum sheets),
An insulating core made of rock wool (also known as mineral wool),
And adhesive layers that bond the core to the facings.
The sandwich panel combines structural integrity with excellent insulation and fire protection properties.
Key Technical Specifications
Core Material: Rock wool, density typically between 80 to 160 kg/m³
Panel Thickness: Usually ranges from 50 mm to 150 mm
Thermal Conductivity (λ): Approximately 0.035–0.042 W/(m·K)
Fire Resistance: Class A1 (non-combustible) as per EN 13501-1
Compressive Strength: 80–150 kPa (varies with thickness and density)
Facing Materials: Galvanized steel (0.4–0.6 mm thick), aluminum, or coated steel
Engineering Principles and Performance
Thermal Insulation
Rock wool’s fibrous structure traps air, providing a high thermal resistance (R-value). This reduces heat transfer through the roof, improving energy efficiency and occupant comfort.
Fire Resistance
Rock wool is inherently non-combustible and can withstand temperatures exceeding 1,000°C without significant degradation. This characteristic classifies the panel as fire-resistant, making it suitable for buildings with stringent fire safety requirements.
Mechanical Strength
The sandwich panel design delivers strong load-bearing capacity while minimizing weight. The metal facings provide tensile strength and protect the insulation core from mechanical damage and environmental exposure.
Acoustic Insulation
Due to the porous nature of rock wool, these panels also provide sound attenuation benefits, reducing external noise intrusion.
Industry Standards and Regulatory Compliance
EN 14509: Self-supporting double skin metal faced insulating panels — Factory made products specifications.
EN 13162: Thermal insulation products for buildings — Factory made mineral wool (MW) products.
EN 13501-1: Fire classification of construction products and building elements.
ISO 9001: Quality management systems for manufacturing consistency.
Local Building Codes: Compliance with national fire safety and energy efficiency codes is mandatory.
Installation and Operational Considerations
Substructure Requirements: Roof supports must accommodate panel loads and allow for expansion due to thermal cycles.
Panel Joining: Use of compatible fasteners and sealants to ensure weather-tightness and prevent thermal bridging.
Handling: Panels should be handled with care to avoid damaging the rock wool core or metal facings.
Vapor Barriers: Installation of vapor barriers is crucial to prevent moisture ingress that could degrade insulation performance.
Fire Safety: Ensure that all ancillary materials (sealants, fasteners) meet fire resistance requirements.
Maintenance: Regular inspection for corrosion, mechanical damage, and sealant integrity extends panel lifespan.
Example Application: Industrial Warehouse Roofing
A 100 mm thick rock wool roof sandwich panel was installed in an industrial warehouse with high fire safety requirements. The panel provided an R-value of approximately 2.5 m²·K/W, contributing to a 20% reduction in HVAC energy consumption. Its fire rating ensured compliance with local fire codes, significantly reducing insurance premiums.
FAQs on Rock Wool Roof Sandwich Panels
Q1: How do rock wool panels compare with polyurethane (PUR) panels?
A: Rock wool panels offer superior fire resistance but are heavier and slightly less insulating than PUR panels. PUR panels have lower thermal conductivity (~0.022 W/m·K) but are combustible.
Q2: Are rock wool roof sandwich panels environmentally friendly?
A: Yes, rock wool is made from natural basalt rock and recycled materials. It is recyclable and does not release harmful gases.
Q3: What is the typical lifespan of these panels?
A: With proper installation and maintenance, rock wool sandwich panels can last 25–40 years.
Q4: Can these panels be used in cold climates?
A: Absolutely. Their insulation properties and moisture resistance make them ideal for harsh climates.
Q5: Are there limitations on roof slope with these panels?
A: Generally, a minimum slope of 5° is recommended to ensure drainage and prevent water accumulation.
Conclusion and Call to Action
Rock wool roof sandwich panels represent a technically advanced solution combining thermal efficiency, fire safety, and mechanical strength, making them indispensable for modern roofing applications. Their compliance with international standards and adaptability across climates and structures affirm their value.
We encourage architects, engineers, and contractors to consult with our experts for tailored advice on selecting and installing rock wool roof sandwich panels that meet your project’s technical and regulatory requirements. Reach out today for detailed specifications, compliance guidance, and competitive quotations.
