Rock Wool Cold Storage Panel – A-Grade Fireproof Insulated Sandwich Panels for Cold Chain & Pharma Facilities
Engineered with high-density rock wool core (100–120 kg/m³), these panels deliver non-combustible thermal insulation for cold rooms operating from -40°C to +60°C ambient. Available in 50mm to 200mm thickness with PPGI, stainless steel, or aluminum skins.
- 🔥 A-Grade Fireproof (EN 13501-1 Class A1)
- 📐 50–200mm Thickness
- 🌡️ λ ≤ 0.040 W/(m·K)
- ✅ CE & ISO Certified
Technical Specifications
| Parameter | Specification / Range | Unit |
|---|---|---|
| Panel Thickness | 50 / 75 / 100 / 120 / 150 / 200 | mm |
| Standard Width | 1000 / 1200 (custom widths available) | mm |
| Length | Up to 12,000 (subject to transport limits) | mm |
| Rock Wool Core Density | 100 – 120 | kg/m³ |
| Thermal Conductivity (λ) | ≤ 0.040 (at 20°C mean temperature) | W/(m·K) |
| Fire Rating | A-Grade (GB 8624) / Class A1 (EN 13501-1) | — |
| Compressive Strength | ≥ 60 (at 10% deformation) | kPa |
| Metal Skin Material | PPGI (0.4–0.8mm) / SUS304 Stainless Steel / Aluminum | — |
| Surface Coating | PE / SMP / HDP / PVDF (color per RAL chart) | — |
| Joint System | Tongue-and-groove cam-lock with EPDM gasket | — |
| Operating Temperature Range | -40 to +60 (ambient); internal room temp down to -40 | °C |
| Water Vapor Permeability | ≤ 0.005 (depending on skin material) | g/(m²·h·Pa) |
Application Scenarios
Food Processing & Cold Chain Logistics
In high-traffic food processing cold rooms and distribution centers, fire safety is non-negotiable. The rock wool core provides passive fire protection while maintaining stable internal temperatures, even with frequent door openings and forklift impacts.
- Withstands heavy forklift collision with reinforced metal skins up to 0.8mm
- Non-combustible core eliminates fire spread risk in facilities storing flammable packaging
- EPDM gaskets ensure minimal air leakage, reducing compressor runtime
Pharmaceutical GMP Cold Storage
Pharmaceutical cold rooms demand strict temperature uniformity and hygienic surfaces. Our SUS304 stainless steel-skinned rock wool panels meet GMP cleanroom requirements while providing the thermal stability needed for vaccine and biologic storage at 2–8°C.
- Smooth, non-porous stainless steel surface enables CIP (clean-in-place) compatibility
- Minimal thermal bridging through precision tongue-and-groove joints
- Validated for temperature mapping in GMP environments
Agricultural Produce & Fruit Preservation
For fruit and vegetable cold stores, humidity control is as critical as temperature. The vapor-barrier properties of our metal skins combined with the breathable rock wool core help manage condensation risk in high-humidity storage environments (85–95% RH).
- Resistant to mold and fungal growth due to inorganic rock wool composition
- Available with aluminum skins for enhanced corrosion resistance in humid conditions
- 50mm to 150mm thickness options balance insulation needs with internal volume optimization
Global Adaptability – Engineered for Every Climate Zone
Africa & Middle East – High Ambient Temperature Performance
In regions where ambient temperatures regularly exceed 45°C, the rock wool core's thermal stability ensures that cold room internal temperatures remain unaffected by external heat soak. We recommend 150–200mm panel thickness for facilities operating in desert climates, where the temperature differential (ΔT) between internal and external environments can reach 80°C or more. The non-combustible core also provides an added safety margin in areas where electrical grid instability may increase fire risk.
Europe & North America – Regulatory Compliance & Low-GWP Standards
Our rock wool panels carry CE marking under EU Construction Products Regulation (CPR) and meet the stringent fire classification requirements of EN 13501-1 Class A1. For North American projects, the panels can be supplied with UL-listed component recognition upon request. The rock wool core contains zero ozone-depleting substances (ODS) and has a global warming potential (GWP) of effectively zero, aligning with the EU F-Gas Regulation and EPA SNAP program objectives for sustainable cold chain infrastructure.
Southeast Asia & South America – High Humidity & Corrosion Resistance
In tropical and coastal regions with relative humidity consistently above 80%, we offer panels with thick-gauge aluminum or PVDF-coated PPGI skins that resist salt-spray corrosion. The rock wool core is inherently hydrophobic-treated to minimize moisture absorption during extended maritime shipping and on-site storage before installation. Reinforced edge protection with galvanized steel profiles further safeguards panel integrity during transport over rough terrain.
Engineering & Construction Details
Internal Structure & Fire-Safe Design
Each panel consists of a high-density rock wool core (100–120 kg/m³) bonded between two metal skins using a two-component polyurethane adhesive. The core is manufactured from basalt and dolomite minerals spun into fibers at 1,450°C, then compressed into rigid boards. This all-mineral composition ensures the panel will not contribute to flame spread or emit toxic smoke, even when exposed to direct fire at temperatures exceeding 1,000°C.
- Core Material: High-density rock wool board (100–120 kg/m³), manufactured from basalt and dolomite, with a melting point above 1,000°C. Free of CFCs, HCFCs, and formaldehyde.
- Adhesive Layer: Two-component polyurethane adhesive with high bonding strength (≥0.10 MPa tensile adhesion), ensuring long-term delamination resistance under thermal cycling.
- Metal Skins: Available in PPGI (0.4–0.8mm, zinc coating 60–275 g/m²), SUS304 stainless steel (0.5–0.8mm), or embossed aluminum (0.5–0.7mm). Custom RAL colors available.
- Joint System: Cam-lock tongue-and-groove profile with integrated EPDM rubber gasket. The gasket compresses during assembly to form an airtight seal, achieving air leakage rates below 0.5 m³/(h·m²) at 50 Pa pressure differential.
- Edge Protection: Galvanized steel edge profiles on all four sides protect the rock wool core from moisture ingress and mechanical damage during handling and installation.
- Thermal Bridge Minimization: The tongue-and-groove geometry creates a labyrinth seal that interrupts the thermal path, reducing linear thermal transmittance (ψ-value) compared to simple butt joints.
Note: The actual internal usable volume of a cold room constructed with rock wool panels is slightly reduced by the panel thickness itself. For example, a 6m × 4m room using 100mm panels loses approximately 0.5m² of floor area compared to the external footprint. We provide detailed cut-list optimization drawings to help buyers maximize usable internal space.
Logistics & Export Packaging
Container-Optimized Crating for Damage-Free Delivery
Every shipment is packed in fumigated plywood crates with internal foam spacers separating each panel. Steel banding secures the crates within the container to prevent shifting during ocean transit. A standard 20ft container accommodates approximately 800–1,200 square meters of panels, depending on thickness. For 40ft HQ containers, capacity increases to roughly 1,800–2,400 square meters.
Factory Quality Control & Inspection
100% Pre-Shipment Inspection Protocol
Before any panel leaves our factory, it undergoes a rigorous multi-point inspection: dimensional tolerance verification (±1mm on thickness, ±2mm on width), visual surface inspection under 500-lux lighting, adhesive bond integrity spot-checking via pull-off testing, and random thermal conductivity sampling per lot. Only panels passing all checkpoints receive the xnair quality release stamp.
Frequently Asked Questions
Our standard MOQ is 100 square meters per thickness specification. For custom dimensions, colors, or non-standard metal skin combinations, the MOQ increases to 500 square meters. We welcome trial orders for new clients and can provide sample panels (300mm × 300mm cut sections) for evaluation prior to bulk purchase. Contact our sales team at support@shsnow.com for a tailored quotation based on your project drawings.
The panels feature a tongue-and-groove cam-lock joint system. During assembly, the male tongue of one panel is inserted into the female groove of the adjacent panel, and the integrated cam-lock mechanism is rotated 90° with a dedicated hex key (included with every shipment). The EPDM gasket compresses to form an airtight seal. No specialized tools or on-site welding is required. A typical 100m² cold room can be assembled by a 3-person crew in 6–8 hours.
The rock wool core achieves Class A1 fire rating per EN 13501-1, which is the highest possible classification for non-combustible building materials. Under GB 8624 (Chinese national standard), this corresponds to Grade A – non-combustible. The panel as a complete assembly (including metal skins) has been tested to withstand direct flame exposure for over 120 minutes without loss of structural integrity, making it suitable for facilities where fire compartmentation is mandated by building codes.
Panels are first wrapped individually in heavy-duty PE film to protect against moisture. They are then stacked with high-density foam spacers between each panel to prevent surface abrasion. The entire stack is placed inside a fumigated plywood crate (ISPM 15 compliant for international shipping) and secured with steel banding. Crates are loaded into containers with additional dunnage to prevent movement. We have successfully shipped to over 40 countries across Africa, the Middle East, Southeast Asia, South America, and Europe with a transit damage rate below 0.3%.
Quality Assurance & Industrial Certifications
Factory Acceptance Testing & Quality Commitment
Every batch of rock wool cold storage panels manufactured by xnair undergoes a documented factory acceptance test (FAT) protocol before release. This includes dimensional accuracy measurement (calibrated laser tools, ±1mm tolerance), visual defect inspection under 500-lux illumination, core density verification via gravimetric sampling, and adhesive bond integrity testing on randomly selected panels from each production lot. Thermal conductivity is verified using a calibrated guarded hot plate apparatus per ASTM C518 / ISO 8301 standards at our in-house laboratory. We retain test records for a minimum of 5 years and can provide batch-specific test certificates upon request.
Our manufacturing facility operates under an ISO 9001:2015 certified quality management system. The rock wool core material is sourced from suppliers holding EUCEB (European Certification Board for Mineral Wool Products) certification, ensuring compliance with EU Directive 97/69/EC (Note Q) regarding biosolubility and safe handling.
