ROCKWOOL® Cavityrock® Black Mineral Wool Insulation Board 4 in x 16 in x 48 in (64 sq ft)
Regular price $419.69Cavityrock Black mineral wool insulation board
ROCKWOOL® Cavityrock® Black is a semi-rigid stone wool insulation board designed for exterior cavity wall and rainscreen applications. Its non-combustible, moisture-resistant construction delivers reliable thermal performance while the black facer helps mask behind open-joint cladding for a cleaner finished look.
Key Features:
- Fire-Resilient Stone Wool: Non-combustible insulation designed to help limit flame spread in exterior wall assemblies.
- Thermal Performance: Provides R-17.2 insulation value for energy-efficient wall and rainscreen builds.
- Black Facer for Open-Joint Cladding: Black mat facer helps visually mask the insulation layer behind open joints.
- Dual-Density Rigidity: Higher-density outer layer improves rigidity for fastening while conforming to the wall surface.
- Moisture & Biological Resistance: Moisture resistant and resists fungi for long-term performance.
Please check the Product Data Sheet Here
Specifications Table:
| Specification | Details |
|---|---|
| Product name | Mineral Wool Roxul Cavity Rock BLK 4"X16"X48" 64SF |
| Brand | ROCKWOOL® |
| Manufacturer part number | RXCVR416B |
| Category | Rigid Board Insulation |
| Color | Black |
| Material | Natural Stone Wool |
| Thickness | 4 in |
| Width | 16 in |
| Length | 48 in |
| Coverage area | 64 sq-ft |
| R-value | R-17.2 |
| Facing type | Unfaced |
| Installation type | Wall |
| Resists | Fungi |
| Density (outer layer) | 6.2 lb/cu-ft |
| Density (inner layer) | 3.8 lb/cu-ft |
Frequently Asked Questions (FAQ):
Q: What is this insulation used for?
A: It’s designed for exterior cavity wall and rainscreen applications and is compatible with many cladding attachment systems.
Q: Is it faced or unfaced?
A: This product is listed as unfaced, and it is also described as having a black facer/mat finish intended for open-joint cladding aesthetics.
Q: What R-value does it provide?
A: R-17.2.
Q: What are the board dimensions and coverage?
A: Each board is 4 in thick x 16 in wide x 48 in long, with 64 sq ft coverage listed for the item.
Q: Does it resist moisture or biological growth?
A: It is described as moisture resistant and listed as resisting fungi.
A shadow-perfect insulation layer for open-joint façades
Cavityrock® Black brings quiet confidence to the wall assembly—performance-forward stone wool wrapped in a deep, light-absorbing facer that disappears behind open-joint cladding. The effect is crisp and architectural: clean reveals, fewer visual distractions, and a façade that reads intentionally finished. Pair it with modern rainscreen systems and precise panel spacing to emphasize rhythm and shadow play. It’s the kind of invisible upgrade that makes a space feel unmistakably more refined and resilient.
Upgrade your exterior wall system with ROCKWOOL® Cavityrock® Black for fire-resilient, R-17.2 performance and a cleaner open-joint cladding look.
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