Joint Star Steel manufactures high-performance rock wool sandwich panels utilizing high-density natural basalt stone mineral wool bonded between two layers of precision-profiled prepainted galvanized steel (PPGI) or Aluzinc sheets.
Designed for industrial manufacturing plants, hazardous chemical storage, power generation facilities, cleanrooms, and public commercial buildings, our rock wool systems provide certified Class A1 incombustible performance, resisting structural fire spread up to 240 minutes while dampening internal industrial reverberations.
Melting point >1000°C, zero toxic smoke emission.
Sound reduction indices up to 35 dB (Rw).
90° perpendicular fiber lamination maximizes shear load.
Weather-grade coatings withstand extreme humidity.
Manufactured on automated continuous hot-lamination lines, calibrated for wall facades, partition firewalls, acoustic ceiling barriers, and weather-tight roofs.
Wall Cladding Engineered with precision tongue-and-groove or concealed fastener joints. Ideal for external architectural facades, interior fire-rated separating walls, and industrial compartmentalization.
Roof System Corrugated 3-rib or 4-rib exterior profile with overlap seam design to prevent capillary water seepage. Formulated for heavy snow/wind loads and rainy climate noise reduction.
Specialty & Acoustic Options with micro-perforated internal liner steel for noise-dampening machine rooms or smooth, flush-sealed faces for certified pharmaceutical, medical, and electronic cleanrooms.
Joint Star Steel structures and panels are tested according to international fire, mechanical, and thermal standards for seamless EPC integration.
| Parameter | 50 mm Panel | 75 mm Panel | 100 mm Panel | 150 mm Panel |
|---|---|---|---|---|
| Core Material | High-Density Natural Basalt Rock Mineral Wool (Hydrophobic Treated) | |||
| Core Density | 100 kg/m³ to 140 kg/m³ (±5 kg/m³) | |||
| Fire Resistance (EN 13501-1) | 60 Minutes | 90 Minutes | 120 – 180 Minutes | 180 – 240 Minutes |
| Combustibility Class | Class A1 (Non-combustible, No Toxic Smoke, Melting Point > 1000°C) | |||
| Thermal Conductivity (λ) | ≤ 0.038 – 0.040 W/(m·K) at 25°C | |||
| Sound Reduction Index (Rw) | 29 dB | 31 dB | 33 dB | 35 dB |
| Facing Steel Thickness | 0.40 mm – 0.80 mm (High Tensile Hot-Dip Galvanized / Aluzinc) | |||
| Surface Finish Options | Polyester (PE), Silicon Modified Polyester (SMP), PVDF, Cleanroom Anti-Static | |||
| Standard Colors | Sea Blue, White Grey, Off-White, Charcoal, Custom RAL color codes on order | |||
Every batch produced in our Dhaka facility conforms to stringent QA protocols, ensuring smooth erection on global job sites.
Manufactured from authentic volcanic basalt stone, without slag contamination, guaranteeing zero biological decay.
Automated two-component polyurethane adhesive spraying ensures continuous peeling resistance and structural durability.
High-precision multi-saw edge profiling eliminates joint gaps and air leakage during site assembly.
Peelable protective film, corner edge bumpers, moisture-barrier wrapping, and palletized packing for maritime transit.
Key information for structural engineers, project managers, and overseas purchasing authorities.
Our rock wool sandwich panels utilize natural high-density basalt fiber core certified as Class A1 non-combustible. Depending on panel thickness (50mm to 200mm) and assembly structure, our panels deliver certified fire integrity and insulation resistance from 60 minutes up to 240 minutes (1 to 4 hours), without releasing noxious fumes or combustible droplets.
Rock wool offers vastly superior acoustic damping. Its porous open-fiber matrix dissipates sound waves effectively, providing sound transmission reduction (Rw) between 30 dB and 35 dB. For ultra-quiet demands such as power generation rooms, pump stations, or industrial workshops, micro-perforated inner facing configurations are available.
We supply skin thickness from 0.40mm to 0.80mm using hot-dip galvanized (GI) steel or Aluzinc steel. Coatings include standard PE polyester, high-durability PVDF, HDP, or food-safe anti-bacterial film in any custom RAL color according to your project's architectural drawings.
Each panel is coated with a peelable UV-protective film. Panels are stacked on timber or foam pallets, wrapped in heavy-duty polyethylene stretch wrap, reinforced with perimeter edge protectors, and strapped with high-tensile PET banding for safe, damage-free 40ft HQ container shipping.
Connect with our technical engineering department to discuss fire rating requirements, structural span tables, custom dimensions, and container shipment schedules for your project.
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