MILTON, ON — Architects, designers, specifiers, contractors and building owners now have a new, innovative and high-performance option when it comes to insulation for open-joint cladding systems. ROCKWOOL has launched Cavityrock® Black,a dual-density insulation board designed to mask the insulation layer with a bonded fleece facing to create a crisp, dark aesthetic in open-joint facades. Cavityrock® Black also offers the same thermal performance, fire resistance, and moisture control of ROCKWOOL Cavityrock® insulation.

"Cavityrock® Black is an innovative solution," said Garrett Feehrer, marketing manager of ROCKWOOL North America. "It eliminates the need for a separate masking layer that can add extra time, materials and cost to an installation, yet it achieves the same crisp look. In architecture, quite simply, aesthetics matter.Cavityrock® Black insulation addresses the need for a dark reveal behind open-jointed cladding systems, while still providing a diverse array of performance advantages in exterior wall and rainscreen applications."

The fleece material on Cavityrock® Black has been strategically designed for exposure to the elements (weather, heat, UV), while maintaining the fire performance expected of ROCKWOOL stone wool and contributing to a durable, resilient exterior wall assembly. Tested in accordance with ASTM E84, ROCKWOOL Cavityrock® Black achieves a flame spread index and smoke development index of 10 and 25 respectively — lower than some commonly used black scrim materials.

A key differentiator is how the facing material is applied. Rather than relying on adhesives like many insulations with facing, the fleece on Cavityrock® Black is bonded to the insulation as part of the manufacturing process, essentially joining the two materials into one. This offers better mechanical properties and superior long-term performance.

As with ROCKWOOL Cavityrock®, the dual-density composition of Cavityrock® Black (a high-density top layer and lower density bottom later), unique to ROCKWOOL in North America, provides an array of benefits not offered by traditional mono-density mineral wool boards. In a rainscreen application, the hard, outer layer acts as a resilient surface to weather exposure, while the lower density layer reduces the overall weight of the board, making it easier to handle.

As a ROCKWOOL stone wool insulation product, Cavityrock® Black provides a number of performance advantages including passive fire protection, sound absorbency and excellent moisture management (ROCKWOOL stone wool is hydrophobic and vapor permeable, with high drying potential). Resistant to mold and mildew, it also contributes to a durable, resilient wall assembly. Cavityrock® Black achieves an R-value of 4.3/inch) and is available in standard 16-inch by 48-inch and 24-inch by 48-inch widths, with thickness ranging from 2 inches to 6 inches.

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