Brief Description:Aluminium foil faced curtain wall rock wool board delivers high-performance building insulation. A1 non-combustible, with high water repellency and infrared heat reflection, it resolves condensation, heat loss and fibre shedding. Custom foil types and sizes for curtain wall insulation, fire stopping and energy saving projects.

Haochen Insulation aluminium-foil faced curtain wall rock wool board is a high-performance composite fire-resistant and thermal insulation panel engineered exclusively for modern curtain wall systems, including stone curtain walls, aluminium panel curtain walls, glass curtain walls and unitised curtain wall assemblies. Manufactured with high-density basalt rock wool core and single/double-sided reinforced flame-retardant aluminium foil through high-temperature hot-press lamination technology, this product effectively resolves four typical curtain wall cavity defects: condensation moisture ingress, thermal energy loss, fibre shedding and inter-layer fire protection failure. It serves as the ideal fireproof and thermal insulation solution for medium and large-scale public building projects, such as commercial complexes, high-rise office towers and exhibition venues.

1. Double-layer Composite Structure

1.1 Core Layer: High-density Curtain Wall Rock Wool Substrate

Produced from premium natural basalt and dolomite raw materials, the core adopts industrial high-temperature melting, centrifugal fibre forming, pendulum layering and high-pressure curing processes. It delivers a compact, stable internal structure that fully adapts to embedded load-bearing installation inside curtain wall cavities.

Fire Performance: The inorganic rock wool core achieves Class A1 non-combustible rating. It generates no molten droplets, no flaming drips and no toxic smoke during fire exposure, fully complying with building curtain wall fire safety design standards.

Density Options: 80kg/m³, 100kg/m³, 120kg/m³, 140kg/m³, 160kg/m³, 180kg/m³. Densities of 100–140kg/m³ are recommended for conventional curtain wall cavity insulation. For high-rise inter-layer fire barriers, coastal high wind-load and heavy-duty curtain wall projects, high-density grades of 160–180kg/m³ are specified to ensure superior compression resistance and long-term structural stability.

Structural Performance: Three-dimensionally interlocked fibre construction creates a uniform, smooth and rigid board surface with outstanding tensile strength, compressive resistance and shrinkage stability. When embedded within curtain wall keel gaps for long-term service, the board resists sagging, delamination and deformation, maintaining reliable dimensional stability for external building applications.

1.2 Surface Layer: Reinforced Mesh Flame-retardant Aluminium Foil Facing (Functional Enhancement Layer)

Glass-fibre reinforced flame-retardant aluminium foil is thermally bonded to the rock wool substrate via high-temperature hot-press moulding, delivering excellent resistance to wrinkling, delamination and tearing. The integrated foil facing enhances overall curtain wall system performance through five core industrial functions:

① Vapour-proof and Moisture-resistant, Anti-condensation Protection

The dense aluminium foil forms a continuous vapour barrier that prevents indoor humid air penetration and eliminates temperature-difference condensation inside curtain wall cavities. It avoids rock wool moisture absorption and insulation performance degradation, while protecting aluminium keels and metal fasteners from corrosion. With an overall water repellency of ≥98%, the board is highly suitable for coastal, high-humidity and rainy climate zones.

② Infrared Heat Reflection for High-efficiency Energy Saving

The aluminium foil surface reflects over 93% of radiant heat, forming a stable external thermal barrier. It blocks solar radiant heat penetration in summer and reduces indoor heat dissipation in winter. Compared with standard unfaced rock wool boards, it improves energy-saving efficiency by approximately 30%, minimises curtain wall thermal bridge loss and optimises building energy consumption indicators.

③ Sealed Fibre Structure for Dust-free Construction

The full aluminium foil covering completely seals internal mineral fibres and eliminates fibre shedding. No dust contamination occurs during on-site cutting and cavity filling, ensuring construction safety and clean curtain wall internal environments. It prevents residual fibre pollution that may shorten the long-term service life of curtain wall systems.

④ Enhanced Mechanical Strength with Superior Weathering Resistance

The aluminium foil outer layer provides effective UV resistance, wind-rain erosion resistance and thermal cycle ageing resistance, slowing performance attenuation of the internal rock wool core under outdoor conditions. Its service life matches the lifespan of building main structures. Meanwhile, the facing improves board stiffness and toughness, preventing bending, fracture and structural deformation during handling, cutting and installation.

⑤ Auxiliary Fire Resistance to Inhibit Vertical Fire Spread

The high-temperature resistant non-combustible aluminium foil obstructs high-temperature smoke and flame penetration. Combined with the Class A1 non-combustible rock wool core, it forms a dual fireproof system that reinforces inter-layer fire stopping performance, restricts vertical fire propagation and upgrades the overall fire safety standard of building curtain walls.

2. Core Application Scenarios for Curtain Wall Systems

Full Cavity Curtain Wall Thermal Insulation

Designed for full filling of cavities behind stone and aluminium exterior panels. It effectively isolates heat transmission, reduces thermal bridge loss and lowers air-conditioning and heating energy consumption, achieving stable long-term building thermal insulation.

Curtain Wall Inter-layer Fire Barrier (Major Application)

Specially applied for sealed filling at floor slab junctions and spandrel wall positions, forming complete horizontal fire separation. It blocks vertical fire spread along curtain wall facades and serves as an essential fire safety component for high-rise curtain wall construction.

Unitised Curtain Wall Prefabricated Lining

Factory precision cut and pre-assembled according to standard curtain wall unit dimensions. On-site hoisting and splicing simplify construction procedures, ensure tight joint sealing, shorten project cycles and improve overall construction efficiency.

Glass Curtain Wall Back-lining Insulation

Applicable for back-panel filling of opaque sections in glass curtain wall systems. It integrates thermal insulation, sound absorption and light shielding functions, meeting the comprehensive performance requirements of high-end public building glass facade systems.

3. Product Core Advantages

Diversified Facing Options & Full-size Customisation

Haochen Insulation supplies multiple aluminium foil facing specifications, including single-sided aluminium foil, double-sided aluminium foil, white aluminium foil and black flame-retardant aluminium foil, customisable to individual project design requirements. All board lengths, widths and thicknesses can be precision cut to match actual keel spacing, ensuring zero on-site material waste and precise cavity fitting.