Rockwool CurtainRock 40 is a lightweight, semi-rigid stone wool insulation board engineered for curtain wall systems, delivering reliable fire protection and thermal performance. Together with CurtainRock 80, it forms a comprehensive perimeter fire containment solution that UL/ULC tests approve.

Key Features & Design

• Applications: Designed specifically for curtain wall systems; suited for backpan or mechanical fastening applications.
• Thickness & Coverage: 3" (40 sq ft per pack); 4" (40 sq ft per pack); 5" (24 sq ft per pack).
• Material & Fire Performance: Non-combustible stone wool with a melting point of approximately 2150°F (1177°C). Rockwool Safe is UL and Intertie approved as a forming material for numerous fire stop systems; UL/ULC tested and approved for perimeter fire containment.
• Moisture & Water Management: Low moisture sorption rate; effectively drains water away from exterior walls.
• Thermal & Acoustic Performance: Delivers higher R-values for lasting thermal protection; sound absorbent.
• Durability & Fabrication: Chemically inert; non-corrosive; can be fabricated and faced with reinforced foil facings.
• Certifications & Sustainability: Approved for use as a component of UL-approved systems; ROCKWOOL can contribute to earning LEED points.
• Fire Protection Synergy: Rockwool Safe, together with CurtainRock 80, provides a comprehensive critical line of defense in fire protection for perimeter containment.