Overview
Fireproof rock wool board is a rigid insulation panel manufactured from molten basalt rock spun into fibers and bonded with thermosetting resin. It is a staple in passive fire protection systems due to its ability to withstand temperatures exceeding 1,000°C without combusting. Commonly used in partition walls, facades, and pipelines, it combines structural integrity with lightweight properties. The material is favored in green building projects for its recyclability and low embodied energy.
Structure and Working Principle
The board's fibrous structure traps air pockets, providing exceptional thermal resistance (thermal conductivity: 0.035–0.042 W/m·K). Its fireproofing capability stems from the inorganic composition of basalt, which melts only at extreme temperatures. During a fire, the board acts as a barrier, delaying heat transfer and preventing structural collapse. The random fiber orientation also disrupts sound waves, offering noise reduction coefficients (NRC) of up to 0.95.
Key Features
Fireproof rock wool boards are distinguished by their A1 fire rating (non-combustible per EN 13501), making them suitable for high-risk environments like chemical plants and high-rises. Hydrophobic additives repel moisture, preventing mold growth and maintaining insulation efficiency. Unlike foam-based insulators, rock wool does not emit toxic fumes when exposed to fire. It also resists corrosion and UV degradation, ensuring long-term durability in outdoor applications.
Application Areas
Primary applications include fire-rated walls, elevator shafts, and industrial boilers. In commercial buildings, it is used behind cladding systems to meet fire codes. HVAC engineers integrate it into ductwork for both insulation and fire containment. The marine and offshore industries rely on rock wool boards for engine room partitions, benefiting from their vibration damping and fireproofing synergy.
Maintenance and Precautions
Routine inspections should check for water damage or compression, which can reduce effectiveness. Damaged sections must be replaced promptly to maintain fire ratings. Installers should use gloves, masks, and goggles to avoid fiber irritation. Wetting the board during cutting minimizes airborne particles. Always adhere to local disposal regulations, as some binders may require special handling.
B2B Procurement Guide
Bulk buyers should verify third-party test reports for fire resistance (e.g., 2–4 hours rating) and thermal performance. Custom sizes (common thickness: 50–150 mm) and densities (80–200 kg/m³) are available for specialized projects. Leading manufacturers include ROCKWOOL, Knauf Insulation, and Paroc. Request samples to assess fiber quality and binder consistency. MOQs typically start at 500 m², with discounts for container loads.
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