Rock Wool Strip——Insulation Material for External Wall & Sandwich Core

1. High Compressive and Tensile Strength (Structural Support)

The vertical fiber orientation is the key advantage, providing enhanced mechanical performance as the fibers act like load-bearing columns.

• For Sandwich Panels: Delivers excellent compressive strength to support metal facings, enabling panels to withstand heavy snow, wind loads, or foot traffic without deformation.
• For External Walls: Provides superior tensile strength perpendicular to the surface, resisting delamination or pull-off under wind suction forces.

2. Class A1 Non-Combustible Fire Protection

Rock wool strips are inherently non-combustible (Euroclass A1) with a melting point exceeding 1000°C.

• External Wall Fire Barriers: Act as horizontal or vertical "fire-stopping belts" to compartmentalize facades and prevent vertical flame spread.
• Sandwich Panels: The rock wool core maintains integrity at high temperatures, limiting smoke production and preventing the "chimney effect" in panel cavities during fire exposure.

3. Superior Bonding and Delamination Resistance

Vertical fibers create a high-surface-area "end-grain" exposure, dramatically improving mechanical anchorage for adhesives.

• Sandwich Panels: Ensures strong, durable adhesion between the rock wool core and metal skins, minimizing delamination risks from thermal expansion, mechanical stress, or aging.
• External Walls (ETICS/EIFS Systems): Provides a robust base for render coats and reinforcing mesh, reducing the risk of cracking or detachment over time.

4. Dimensional Stability and Hydrophobicity

Manufactured from inorganic basalt rock, rock wool strips exhibit excellent long-term stability.

• Durability: No shrinkage, swelling, warping, or degradation, maintaining performance throughout the building's lifespan.
• Moisture Resistance: Factory-applied water-repellent treatment ensures low water absorption, preserving thermal efficiency even in exposed or humid exterior wall conditions.

5. Precision Engineering for Optimal Performance

Available in standard rectangular or custom-shaped (e.g., trapezoidal) lamella strips, precision-cut to tight tolerances.

• Eliminating Thermal Bridges: A perfect fit against panel profiles or adjacent strips minimizes gaps and air leakage for consistent insulation performance.
• Acoustic Performance: Dense vertical fiber structure effectively absorbs sound, reducing noise transmission (e.g., rain impact on metal roofs) and improving indoor comfort in industrial and commercial buildings.

About Us

• 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, thereby contributing to energy conservation and reducing carbon emissions. 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.

FAQ

3. Why use Rock Wool Lamella instead of standard boards in sandwich panels?
Lamella provides vertical fiber orientation, which increases the compressive strength of the panel by up to 5 times compared to horizontal fiber boards.

4. What is the ideal density for sandwich panel lamellas?
For structural integrity, a density of 100k -140k is recommended to achieve the best balance of insulation and strength.