Sandwich Rock Wool Panel
Sandwich rock wool panels provide a robust, fire-safe, and energy-efficient solution for modern construction. Their non-combustible core makes them ideal for projects requiring high fire ratings, while their thermal insulation and acoustic properties enhance occupant comfort. Lightweight yet durable, they reduce structural loads and enable faster installation compared to conventional masonry. With compliance to global fire and insulation standards, these panels deliver long-term durability and low maintenance. Their versatility makes them suitable for industrial, commercial, and residential applications, ensuring both safety and performance. As a result, they remain a cost-effective and sustainable alternative to traditional walling systems.
A sandwich rock wool panel is a composite building material engineered for thermal insulation, fire resistance, and acoustic performance. Made by combining rock wool insulation between durable facings such as galvanized steel, aluminum, or cement fiber boards, these panels are widely applied in industrial, commercial, and residential construction. This article explores the engineering properties, standards, regulatory requirements, and operational considerations for sandwich rock wool panels.
Engineering Principles
1. Material Composition
Core: Inorganic rock wool fibers produced from basalt or diabase.
Density: Typically 80–150 kg/m³, depending on fire and thermal specifications.
Thermal Conductivity: λ = 0.035–0.045 W/m·K.
Facings: Pre-painted galvanized steel (PPGI/PPGL), aluminum sheets, or calcium silicate boards.
2. Structural and Thermal Properties
Panel Thickness: Commonly 50–200 mm.
Compressive Strength: ≥ 60–100 kPa.
Fire Rating: Up to 4 hours fire resistance when tested under ISO 834 or EN 1363-1.
Acoustic Insulation: STC rating up to 40–45 dB.
3. Functional Benefits
High fire safety due to non-combustible rock wool core.
Excellent resistance to moisture, corrosion, and pests.
Dimensional stability under fluctuating temperatures.
Standards and Regulations
EN 13501-1: Fire classification of construction products (rock wool panels achieve Euroclass A1 non-combustibility).
EN 14509: Self-supporting double-skin metal faced insulating panels.
ASTM C423: Sound absorption and acoustic performance testing.
GB 8624 (China): Classification for burning behavior of building materials.
Compliance ensures safety, energy efficiency, and durability in all applications.
Installation and Operational Considerations
Joint Systems: Tongue-and-groove or concealed fastening systems to ensure airtightness and stability.
Moisture Control: Panels should be sealed at edges to prevent water ingress.
Load Considerations: Primarily non-load-bearing, but can serve as walls, ceilings, or roofing systems.
Maintenance: Regular inspection of joint seals and surface coatings prolongs lifespan.
Example Applications
Industrial Plants: Fire-resistant partitions and enclosures.
Commercial Buildings: External wall cladding and roofing.
Cleanrooms and Hospitals: Controlled environments requiring fire and acoustic performance.
Modular Construction: Prefabricated buildings with rapid installation needs.
Performance Data Example
A 100 mm rock wool sandwich panel typically provides:
U-value: 0.38 W/m²·K
Fire rating: EI120–EI240 (2–4 hours)
Acoustic insulation: 42 dB
Weight: 12–15 kg/m²
Frequently Asked Questions (FAQ)
Q1: Are rock wool panels safe for indoor use?
Yes, they are non-toxic, non-combustible, and comply with indoor air quality standards.
Q2: How long do sandwich rock wool panels last?
Typically 25–30 years with proper installation and maintenance.
Q3: Can these panels be used in humid environments?
Yes, provided edges are sealed and facings are corrosion-resistant.
Q4: How do they compare to polyurethane panels?
Rock wool panels offer superior fire resistance but lower thermal efficiency compared to PUF.
