Brief Description:Professional curtain wall rock wool boards feature premium A1 non-combustible performance, low thermal conductivity, high water repellency and excellent weather resistance. Available with aluminium foil and non-woven fabric facings and custom sizes, they suit building curtain wall insulation, fire stopping and noise reduction engineering projects.

Haochen Curtain Wall Rock Wool Board is a fire-proof and thermal insulation filling product specially developed for various curtain wall systems, including dry-hanging stone, aluminium panel and glass curtain walls. Using high-quality basalt as the core raw material, it is manufactured into high-density rigid rock wool boards through multiple processes including high-temperature melting, centrifugal fibre forming, high-pressure curing and deep hydrophobic modification.

Different from ordinary rock wool for external wall rendering systems, this product adopts a high-density formulation with high compressive strength and excellent inter-layer bonding strength. It is specially engineered for curtain wall cavity filling construction, and will not soften, sag or absorb water during long-term service. It can simultaneously meet the multiple specifications of building curtain wall fire separation, thermal insulation and sound absorption, making it a dedicated fire-proof and thermal insulation material for curtain wall projects such as commercial complexes, office buildings, high-rise residences and industrial plants.

 Core Advantages

1. Class A1 Non-combustible Performance, Meeting Mandatory Curtain Wall Fire Safety Requirements

The product is made of pure inorganic mineral fibres, with Class A1 non-combustible rating. It will not spread open flame, produce molten droplets or release toxic smoke when exposed to fire. With outstanding fire integrity, the board will not shrink or pulverise under high temperature. It is ideally applied in scenarios such as inter-floor fire-stopping of curtain walls, floor fire barrier strips and spandrel wall fire filling, complying with fire safety codes for high-rise buildings and effectively eliminating the hazard of vertical fire spread in curtain wall systems.

2. High-density Rigid Structure, No Settlement or Collapse in Cavity Filling

Adopting a dedicated high-density formulation for curtain walls, the board features compact texture and firmly interwoven fibres, with vertical tensile strength and compressive strength far higher than ordinary rock wool. Once installed in curtain wall cavities, it will not sag, deform or delaminate over long service life, eliminating the need for frequent maintenance. It solves the common industry pain points of settlement and insulation discontinuity failure of conventional soft rock wool, and supports the full lifecycle operation of high-rise curtain walls.

3. Standard and Hydrophobic Two Types Optional

Two substrate options, standard type and hydrophobic type, are available to adapt to different service environments. The standard non-hydrophobic version delivers better cost efficiency, suitable for curtain wall cavity filling in dry environments, meeting basic thermal insulation and fire protection requirements with high cost performance. The hydrophobic type adopts full-depth hydrophobic impregnation technology, with mass moisture absorption rate ≤1%, which effectively blocks rainwater and condensation moisture from penetrating into the board. Targeting the problem of condensation build-up in curtain wall cavities caused by temperature fluctuations, it maintains dimensional stability and uncompromised insulation performance even in humid conditions, preventing moisture-induced mildew and insulation failure, and ensuring reliable service in various humid working scenarios.

4. Integrated Thermal Insulation and Sound Absorption, Effectively Reducing Building Energy Consumption

Its internal three-dimensional interlaced porous fibre structure delivers low thermal conductivity, effectively blocking external heat and cold transfer, cutting the energy consumption of air conditioning and heating systems, and easily meeting building energy efficiency design standards. Meanwhile, the porous structure efficiently absorbs airborne noise, attenuating outdoor noise from roads and commercial areas and improving indoor acoustic comfort, with remarkable noise reduction performance in office buildings, commercial complexes and other public spaces.

5. High Dimensional Accuracy, Improving Curtain Wall Construction Efficiency

The board boasts high surface flatness, neat cutting edges and tight dimensional tolerances, which can precisely match curtain wall module dimensions. It allows convenient on-site cutting and leaves minimal joints after installation. With stable fibre structure and low fibre shedding, it generates little dust during dry-hanging installation, greatly improving curtain wall construction efficiency and shortening the overall project period.

6. Eco-friendly and Ageing-resistant, Service Life Aligned with Building Structure

Made from natural basalt, it contains no hazardous substances such as formaldehyde or asbestos, complying with green building material selection standards. The product features UV resistance and thermal cycle ageing resistance, with no significant performance degradation after long-term placement in closed curtain wall cavities. Its thermal insulation and fire protection service life is consistent with the design life of the main building structure.

 Key Technical Parameters

1. Fire Rating: Class A1 Non-combustible

2. Thermal Conductivity: ≤0.040 W/(m·K)

3. Common Densities: 80 kg/m³, 100 kg/m³, 120 kg/m³, 140 kg/m³ (100/140 kg/m³ are mainstream specifications for curtain wall projects)

4. Tensile Strength Perpendicular to Board Face: ≥10 kPa

5. Compressive Strength: ≥40 kPa

6. Mass Moisture Absorption Rate: ≤1.0%

7. Dimensional Stability: ≤0.5%

8. Standard Specifications: 1200×600 mm; thickness: 50 mm, 60 mm, 80 mm, 100 mm, 120 mm, 150 mm, customisable on request

 Suitable Systems and Installation Instructions

Suitable Systems: Compatible with all types of dry-hanging curtain wall systems, including stone curtain wall, aluminium panel curtain wall, glass curtain wall, terracotta panel curtain wall and perforated metal panel curtain wall.

Standard Application Scenarios:

1. Inter-floor fire-stopping filling between floor slabs and curtain walls

2. Thermal and fire filling in spandrel wall and mullion wall cavities

3. Full-cavity thermal and acoustic insulation for complete curtain wall systems

4. Fire barrier filling for equipment rooms and industrial exterior curtain walls

Installation Procedure:

Complete curtain wall keel installation → Clean cavity interior → Install whole rock wool boards with dense packing, ensuring tight and gap-free joints → Seal joints and edges with matching fire sealant and fire-stopping edge strips to form an integrated fire-proof and thermal insulation system.