Rock Wool Insulation

High-Performance Rock Wool Insulation Product & Technical White Paper

Rock Wool Board Manufacturer
China Rock Wool Slab Supplier for Bulk & Project Orders
Fire-resistant rock wool insulation boards with customized density, thickness and size for building and industrial insulation.
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Rock Wool Slab
Product form: rigid rock wool slab. rock wool slab is prepared for facade fire belts, partition walls, roof decks, and equipment room insulation.
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Fire Rated Calcium Silicate Board
Product form: fire rated calcium silicate board. fire rated calcium silicate board is prepared for duct enclosures, wall lining, ceiling fire layers, and equipment protection covers.
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Rock Wool Insulation Rolls
Product form: rock wool roll insulation. rock wool insulation rolls is prepared for steel roofs, workshops, wall cavities, and large flat areas needing fire-safe fiber.
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Fire Rated Foil Faced Rock Wool Blanket
Product form: foil faced rock wool blanket. fire rated foil faced rock wool blanket is prepared for fire-rated duct wraps, roof areas, equipment jackets, and steel structure covers.
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Smoke Exhaust Duct Insulation Board
Product form: board layer for smoke exhaust duct protection. Smoke Exhaust Duct Insulation Board is prepared for basement smoke exhaust ducts, fan room duct sections, and fire-control air routes.
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Raw Materials & Manufacturing

Manufactured from natural basalt rock and selected inorganic minerals. Raw materials are melted in a cupola furnace at temperatures exceeding 1,500°C and centrifugally spun into fine mineral fibers. A controlled amount of thermosetting binder and hydrophobic additives is applied during the fiberization process. The resulting three-dimensional random fiber matrix traps microscopic air cells, delivering structural integrity, thermal resistance, acoustic dampening, and moisture control.

Technical Specifications & International Standards

Property	Specification
Primary Material	Natural Basalt Rock
Density Range	40--200 kg/m^3
Thickness	25--150 mm (Customizable)
Standard Width	600 mm / Custom
Thermal Conductivity	0.034--0.044 W/m*K (at 25°C)
Continuous Service Temp	Up to 650°C--750°C
Fiber Melting Point	>1,000°C
Fire Classification	Euroclass A1 / ASTM E136 Non-Combustible
Acoustic Performance	NRC 0.80--1.05
Water Absorption	<1 kg/m^2 (Hydrophobic grades)
Facing Options	Aluminum Foil, Reinforced Kraft Paper, Glass Tissue, Galvanized Wire Mesh
Certified Quality Systems	Manufactured under ISO 9001 (Quality Management) and ISO 14001 (Environmental Management) standards

Core Performance Characteristics

Thermal Efficiency

The porous matrix minimizes internal air convection and conductive heat transfer. This limits heat loss in industrial piping and reduces cooling/heating loads in building envelopes.

Non-Combustible Fire Barrier

Composed entirely of inorganic rock fibers. It does not ignite, melt, or release flaming droplets when exposed to direct flame, meeting structural fire-rating codes up to 750°C.

Acoustic Absorption

The random distribution of directional fibers creates frictional resistance as sound waves pass through the material, converting acoustic energy into thermal energy across a broad frequency spectrum (NRC 0.80--1.05).

Moisture Management

Integrated silicone-based hydrophobic agents cause liquid water to bead and run off the surface. Simultaneously, the vapor-permeable matrix allows trapped moisture to diffuse outward, preventing internal condensation pockets and mold growth.

Mechanical & Dimensional Stability

High-density boards (40--200 kg/m^3) resist compression and structural sagging under load. The inorganic stone composition prevents thermal expansion or contraction across temperature cycles.

Chemical Neutrality

Chemically inert with a near-neutral pH level. It does not induce galvanic or stress corrosion on carbon steel, stainless steel, or copper pipes and tanks.

Product Configurations & Applications

1. Rock Wool Board (60--200 kg/m^3)

Rigid panels applied in exterior insulation finishing systems (EIFS), rainscreen curtain walls, flat roofs, and sandwich panels.

2. Rock Wool Blanket & Roll

Flexible insulation mats suited for large-radius cylindrical storage tanks, industrial ovens, and large-diameter ducts.

3. Wire Mesh Blanket

Rock wool blankets stitched to galvanized or stainless steel wire mesh using stainless steel wire. Designed for high-vibration industrial boilers, flues, and high-temperature piping where mechanical reinforcement is required.

4. Pipe Section

Pre-molded rigid cylindrical sections split longitudinally for fast installation on industrial process piping, steam lines, and HVAC chilled water systems.

5. Faced Rock Wool

Factory-laminated with aluminum foil or glass cloth to function simultaneously as a radiant heat reflector, vapor retarder, and clean protective finish for indoor HVAC ductwork.

Custom Manufacturing, Supply Chain & Quality Assurance

OEM & Customization: Direct manufacturing support for custom dimensions, variable densities, specialized facings, hydrophobic treatments, and private-label packaging.

Supply Chain Support:

Minimum Order Quantity (MOQ): Flexible batch options to accommodate varying project scales and distribution needs.
Lead Time: Standard production turnaround within 7 to 15 working days; swift response for customized orders.

Quality Inspection: Batch testing protocols monitor raw material basalt composition, fiber diameter distribution, cured density, binder content, thermal conductivity (guarded hot plate method), and compressive strength prior to packaging.

Packaging & Logistics: Compressed and secured via PE shrink wrapping, heavy-duty woven bags, or export-grade fumigation-free wooden pallets designed for container space optimization and long-distance maritime transit safety.

FAQ

Q: What is the difference between rock wool and glass wool insulation?

A: Rock wool is produced from natural basalt rock, offering higher fire resistance, better compressive strength, and superior high-temperature performance. Glass wool is lighter and often preferred for lightweight building insulation, but generally has lower maximum service temperatures.

Q: Is rock wool insulation waterproof?

A: Rock wool is water repellent (hydrophobic) rather than waterproof. Integrated treatments help prevent liquid water absorption while allowing water vapor to pass through, maintaining stable insulation performance without trapping moisture.

Q: Can rock wool be used outdoors?

A: Yes. However, outdoor applications typically require protective metal cladding or weather-resistant facings to shield the insulation from prolonged exposure to heavy rain and mechanical damage.

Q: What temperatures can rock wool withstand?

A: Depending on the product grade, continuous service temperatures generally range from 650°C to 750°C, with fiber melting points exceeding 1,000°C.

As one of the most professional rock wool insulation manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to buy bulk premium rock wool insulation for sale here from our factory. Welcome to view our website for more information.

foil faced rock wool blanket, HVAC Fire Barrier Board, Smoke Exhaust Duct Insulation Board