Curtainrock®
ROCKWOOL Curtainrock® is a stone wool insulation board designed for use in ASTM E2307 tested and approved perimeter fire containment systems as the insulation for the spandrel and mullion cover applications.
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Popular applications
- Exterior wall insulation
- Fire protection insulation
- Perimeter fire containment insulation
About this product
ROCKWOOL Curtainrock® is a stone wool insulation board designed for use in ASTM E2307 tested perimeter fire containment systems in spandrel and mullion cover applications.
Available unfaced or with a reinforced foil facing (RFF), Curtainrock is noncombustible and fire resistant, and will not develop smoke or promote flame spread when exposed to fire.
Curtainrock is also moisture repellent and dimensionally stable, supporting long term thermal performance.
- Noncombustible and fire resistant
- A component of tested ASTM E2307 assemblies
- Nominal 4lb and 8lb densities available
- Water repellent to resist absorption
- Dimensional stability to maintain performance
Why use stone wool insulation
- Noncombustible and fire resistant, stone wool works to contain a fire and prevent its spread.
- Dimensionally stable, stone wool does not expand or contract due to temperature variances.
- Durable inorganic material that does not rot or promote the growth of mildew, fungi or bacteria
- Approved for use as a component of UL and ULC approved perimeter fire containment systems.
Applications
- Installed in tested perimeter fire containment systems.
- Used as spandrel panel insulation and mullion covers.
- Ideal for commercial and high-rise construction.
- Can be installed in unitized or stick-built curtain wall systems
Product certificates
UL Classified - CA/USA
ETL Intertek Listed - CA/USA
Declare
Curtainrock® sizes, dimensions & packaging
Find Curtainrock® thickness, width, length and pack quantities—everything you need for accurate specification and ordering.
- All
- 4.2
- 4.3
- 6.3
- 6.45
- 8.4
- 8.6
- 12.6
- 12.9
- 16.8
- 17.2
- 21
- 21.5
- 25.2
- 25.8
- All
- 1
- 1.5
- 2
- 3
- 4
- 5
- 6
Specifications & testing
Explore Curtainrock® specifications and test results, based on relevant industry standards.
| Name | Value | Unit | Test standard |
|---|---|---|---|
| Mineral Fiber Block and Board Thermal Insulation | Curtainrock 40/80 - Type IVB Compliant | ASTM C612 | |
| Flame spread index | 0 | ASTM E84 | |
| Smoke Developed Index | 0 | ASTM E84 | |
| Combustibility of Materials at 750 °C | Non-combustible | ASTM E136 | |
| Determination of Non Combustibility of Building Materials | Non-combustible | CAN/ULC S114 | |
| Corrosion of Steel | Passed | ASTM C665 | |
| Density description | Nominal Density, Minimum - 4.0 or 8.0 lbs/ft³ (64 or 128 kg/m³) | ||
| R-Value / inch @ 75 °F | 4.3 | hr.ft².F/Btu | ASTM C518 (C177) |
| RSI value / 25.4 mm @ 24 °C | 0.75 | m²K/W | ASTM C518 (C177) |
| Determination of Fungi Resistance | Passed | ASTM C1338 |
Curtainrock® technical documents & resources
Download Curtainrock® technical documents and resources, including the product data sheet, to support accurate specification and efficient project planning.
Curtainrock 40 curtain wall thermal insulation - Data sheet
Curtainrock 80 curtain wall thermal insulation - Data sheet
Curtainrock curtain wall thermal insulation - Data sheet
Guidelines for cutting stone wool insulation
Dimensional stability of rigid board insulation products
Perimeter fire containment system - Product and service guide
ROCKWOOL offers a variety of products for UL and Intertek listed perimeter fire containment systems, including Curtainrock® 40/80 and ROXUL Safe®. Learn more about these products, the fire resiliency advantage and the role our stone wool insulation plays in a comprehensive set of ASTM E2307-tested systems.
Related products
Explore more stone wool insulation solutions for similar applications.
Exterior wall
ROXUL Safe®
ROCKWOOL ROXUL Safe® is a stone wool fireblocking insulation designed to fill perimeter gaps between concrete floor slabs and exterior wall systems, between firewalls and ceiling slabs, through penetrations, and around conduit pipes and duct openings.
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Product support & insights
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