Rock Wool Board for Curtain Wall Infill Insulation

1. Excellent Fire Containment

As a Euroclass A1 non-combustible material with a melting point exceeding 1000°C, rock wool boards effectively prevent vertical fire spread in the Spandrel Area. They act as fire stops, blocking the "chimney effect" between the floor slab and facade, maintaining insulation integrity and limiting smoke propagation even under intense heat exposure (Smoke Seal). In high-rise curtain wall systems, our rock wool boards act as a Perimeter Fire Containment. By filling the gaps between the floor slab and the curtain wall, it effectively prevents the 'chimney effect' during a fire, buying valuable time for evacuation.

2. High Hydrophobicity and Effective Moisture Management

Factory-treated with water-repellent agents, these boards exhibit low water absorption while remaining vapour-permeable. In ventilated curtain wall cavities exposed to wind-driven rain or condensation, this combination allows the system to "breathe"—facilitating rapid drying of any moisture and preventing corrosion of metal components or mold growth.

3. Precision Fit and Sag Resistance

Semi-rigid and dimensionally stable, rock wool boards offer superior handling compared to flexible glass wool blankets. They can be friction-fitted or mechanically fixed without sagging over time and are easily cut to fit precisely around mullions, transoms, and brackets—eliminating gaps, thermal bridges, and ensuring long-term energy efficiency.

4. Superior Acoustic Performance

The dense, fibrous structure of rock wool provides excellent sound absorption and damping. In urban curtain wall applications, it effectively reduces external noise transmission (e.g., traffic, wind, and airborne sound), minimizing resonance in metal panels and contributing to a quieter, more comfortable indoor environment.

5. Non-Corrosive and Chemically Inert

Manufactured from inorganic basalt rock with low chloride content, rock wool is chemically neutral and compatible with aluminum frames, steel backpans, and galvanized fasteners. It does not promote or accelerate corrosion, ensuring the long-term durability and structural integrity of the curtain wall system.

• Leading Rock Wool Manufacturer with Proven Industry Expertise
  Founded in 2009, Anhui Liluan Technology Co., Ltd. stands as a trusted name in mineral wool insulation manufacturing. We specialize in producing high-performance rock wool boards, blankets, and pipe insulation materials widely used in construction, industrial, and agricultural applications. With over 15 years of focused development, Liluan combines advanced manufacturing knowledge with strict quality standards, supporting global partners in achieving better thermal, fire, and sound performance.
  
• Fully Integrated Production Lines Backed by Stringent Quality Control
  Our production base operates cutting-edge automated lines designed to maximize efficiency and ensure uniform quality. Each stage of the process—from raw material selection to final product packaging—is subject to rigorous inspections, meeting ISO 9001 and CE certification standards. Our integrated systems enable large-volume, custom-dimension production that adapts seamlessly to specific project requirements, ensuring both product performance and cost-efficiency.
• Scalable Output with Global Market Reach
  With an annual output capacity sufficient to serve large-scale international contracts, Liluan is well-positioned to support long-term industrial supply chains. Our export network spans across Europe, the Middle East, Southeast Asia, and the Americas, reflecting a proven ability to deliver quality consistently and on time. Customers rely on our flexible logistics and responsive support team to simplify procurement and ensure reliability in every delivery.
• Commitment to Sustainable Manufacturing and Customer-Centric Service
  Sustainability is embedded in our manufacturing processes—from energy-efficient kilns to the use of recyclable packaging. Our products enhance building insulation performance, contributing to energy conservation and carbon emission reduction. We offer personalized pre-sale consultation, technical support, and post-sale assistance, aligning every project with client goals. Whether you are sourcing for infrastructure, OEM supply, or retail channels, Liluan is your capable and responsible partner in insulation solutions.

3. Why is rock wool preferred for curtain wall infill?

Rock wool provides critical fire resistance (A1 grade), excellent sound attenuation, and thermal stability that organic foams cannot match, ensuring the safety of high-rise curtain wall systems.

4. Can Liluan rock wool be customized for specific R-values?

Yes, we offer various thicknesses and densities to meet specific U-value and R-value requirements for global green building certifications like LEED.