Brief Description:A1 aluminium foil faced rock wool board has vapour barrier & heat reflection. Custom specs. Factory direct for HVAC, curtain wall & industrial projects.

Fire-retardant Foil-Faced Rock Wool Board is a high-performance composite thermal insulation material composed of a basalt rock wool core and a heat-bonded fire-retardant aluminium foil facing. It integrates fire protection, thermal insulation, vapour barrier and sound absorption functions, and is widely used in HVAC duct systems, steel-structure roofs, building facades and industrial equipment insulation projects.

Made of natural basalt via high-temperature melting and centrifugal fibre-forming to produce inorganic mineral fibres. Uniform, tightly interwoven fibres deliver stable chemical properties, outstanding corrosion resistance and anti-ageing performance. It resists pulverisation, collapse and deformation over long-term service. Densities from 80 kg/m³ to 180 kg/m³ are available upon request. Compressive and tensile strengths meet standard requirements, suitable for diverse load-bearing, thermal insulation and fire safety working conditions.

Surface Facing: Heavy-duty Fire-retardant Aluminium Foil

High-purity reinforced fire-retardant aluminium foil is thermally bonded, featuring high bonding strength, high temperature resistance and low risk of delamination. The dense, air-tight foil forms a complete vapour-barrier shield, delivering thermal radiation reflection, moisture blocking and core material protection to keep rock wool performance stable. Single-sided foil and double-sided foil variants are available for different construction scenarios.

Eight Core Advantages

Class A1 Highest-grade Fire Resistance for Smooth Fire Safety Acceptance

The inorganic rock wool core achieves a Class A1 non-combustible rating in accordance with GB 8624-2012, and withstands temperatures above 1150 °C. It will not burn, produce molten droplets or release toxic smoke under flame exposure, effectively restraining vertical and horizontal fire spread. Combined with the fire-retardant foil facing, it is suitable for high-risk zones such as smoke exhaust ducts, fire-stopping belts and power distribution rooms, fully meeting building fire inspection requirements.

Dual-layer Thermal Insulation to Cut Building Energy Consumption

The porous fibrous structure traps static air, with thermal conductivity ≤0.040 W/(m·K) for reliable baseline insulation. The aluminium-foil surface reflects over 95% of infrared thermal radiation, creating a dual energy-saving system of conduction insulation and radiation reflection. Compared with bare rock wool boards, thermal insulation efficiency is improved by 25–30%. It retains indoor heat in winter and blocks external heat ingress in summer, reducing air conditioning and heating operating costs for factories, shopping malls and office buildings.

Powerful Vapour-barrier and Moisture-proof Performance to Avoid Condensation and Water Leakage Issues

Dual-protection system combining dense foil vapour barrier and hydrophobic rock wool substrate, with water repellency ≥98%. It prevents vapour, ground moisture and condensate from penetrating into the rock wool core.

  For HVAC ventilation and smoke exhaust ducts: eliminates outer surface condensation and dripping, prevents ceiling mildew and metal duct corrosion.

  For roof and basement ceilings: blocks upward moisture migration, keeps the insulation layer permanently dry, prevents gradual performance degradation and significantly extends service life.

High-efficiency Sound Absorption to Optimise Acoustic Environment

Interlaced porous fibres absorb and dissipate airborne sound waves and block airborne noise. Suitable for workshops, equipment rooms, underground parking garages and commercial ceilings, it reduces noise generated by fans, machinery and traffic. Multi-functional performance is achieved with both thermal insulation and sound absorbing capabilities.

Robust Structure for Extra-long Service Life

High-density rock wool offers excellent compressive and tensile strength to resist compression deformation. A high acidity coefficient formula provides good acid-alkali resistance and weather resistance, resisting pulverisation and cracking under drastic temperature fluctuations and open-air exposure. The outer foil protects the core material against dust, moisture and insect erosion. Service life can exceed 30 years under normal building service conditions.

Eco-friendly and Harmless, Meeting Green Building Standards

An environment-friendly water-based binder is used during production. Free from formaldehyde, asbestos and other hazardous substances with zero odour emission. Raw materials are natural basalt minerals and are recyclable. Fully compliant with green building specifications, ideal for residential buildings, hospitals, schools and clean workshops.

Easy and Fast Installation to Save Labour and Construction Period

The smooth foil surface enables convenient cutting without fibre shedding or skin irritation. Multiple installation methods including bonding, anchoring and hoisting are supported. Seal joints with matching aluminium-foil tape to form an integrated moisture-proof, thermal insulating and fire-proof system; no additional vapour barrier membrane is required. It simplifies working procedures and shortens the construction cycle. Uniform dimensions suit large-area laying and reduce labour costs.

Direct-source Manufacturer Supply with Customisable Specifications

Haochen operates standardised production lines with no middleman markup and supports project-oriented customisation.

Density: 80 kg/m³, 100 kg/m³, 120 kg/m³, 140 kg/m³, 160 kg/m³ optional

Thickness: 30 mm, 50 mm, 80 mm, 100 mm, 120 mm, 150 mm, 200 mm; other sizes available upon request

Facing type: single-sided foil, double-sided foil, six-sided fully-encapsulated foil are available

Both small-batch and large-project orders are accepted. In-stock goods and scheduled production are available for stable supply and cost-effective pricing.

Application Scope

HVAC and Fire Protection: Thermal insulation, fire proofing and moisture proofing for central air conditioning ventilation ducts and fire smoke exhaust ducts (main application)

Steel-structure Buildings: Thermal insulation and moisture proofing for roof and inner wall lining; fire protection cladding for steel components

Building Facade: Backup insulation for stone and aluminium panel curtain walls; external wall fire-stopping band projects

Underground Spaces: Thermal insulation, moisture proofing and anti-condensation for basement and garage ceilings

Machine Room and Industrial Sites: Thermal insulation, noise reduction, fire proofing and dust proofing for walls and ceilings of power distribution rooms, fan rooms and refrigeration machine rooms

Industrial Equipment: Thermal insulation and anti-corrosion cladding for boilers, storage tanks and heat pipeline outer surfaces

Public Buildings: Thermal insulation and sound absorption for ceilings and inner walls of shopping malls, office buildings, hospitals and schools