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ROCKWOOL Cavityrock
Rainscreen and Cavity Wall Rainscreen Continuous Insulation Steel Stud Wood Frame Construction Insulation

CAVITYROCK®

CAVITYROCK® is a semi-rigid insulation board designed for exterior cavity wall and rainscreen applications. These products offer superior long-term thermal efficiency, fire resistance, moisture control, acoustic performance and are compatible with numerous framing systems and cladding attachment systems.

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CAVITYROCK® is a semi-rigid insulation board designed for exterior cavity wall and rainscreen applications

These products offer superior long-term thermal efficiency, fire resistance, moisture control, acoustic performance and are compatible with numerous framing systems and cladding attachment systems.

ROCKWOOL CAVITYROCK®, in thicknesses of up to 2 inches, is mono-density and in thicknesses of 2.5 to 6 inches is dual-density. The unique dual-density insulation combines a high density outer layer and a more compliant, low density inner layer that are created simultaneously in our proprietary manufacturing process.

Properties:

  • Non-combustible stone wool insulation with melting point of approximately 1177°C (2150°F)
  • Fire-resistant due to its high melting temperature
  • Water and moisture resistant; does not absorb moisture to maintain insulating value
  • Chemically inert
  • Does not rot or promote the growth of mildew, fungi or bacteria
  • CFC- and HCFC- free product and process
  • Made from natural and recycled materials
  • ROCKWOOL® can contribute to earning LEED® points
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Specification & sizes

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Compliance ASTM C612, MEA Approval - CAN/ULC S702
ASTM C612 Mineral Fiber Block and Board Thermal Insulation - Type IVB Compliant
236 - 05 - M MEA Approval, New York City Approval
CAN/ULC S702 For information on CAN/ULC S702 compliance, contact ROCKWOOL Technical Support
Density ASTM C303
ASTM C303   Density (thickness: 1", 1.5") Monolithic Density of 5.3 lb/ft³ (85 kg/m³)
Density (thickness ≤ 2") Monolithic Density of 4.4 lb/ft³ (70 kg/m³)
Density (thickness ≥ 2.5") Dual-Density - 6.2 lb/ft³ (100 kg/m³) outer layer and 4.1 lb/ft³ (65 kg/m³) inner layer
Dimensions
24" x 48" (610 mm x 1219 mm)
16" x 48" (406 mm x 1219 mm)
Thickness
1" (25.4 mm) to 6" (152.4 mm)
Reaction to fire ASTM E84 (UL 723) - CAN/ULC S102 - CAN/ULC S114 - ASTM E136
ASTM E84 (UL 723) Flame spread index = 0 ; Smoke developed index = 0
CAN/ULC S102 Flame spread index = 0 ; Smoke developed index = 0
CAN/ULC S114 Determination of Non-Combustibility of Building Materials - Non-Combustible
ASTM E136 Behavior of materials at 750°C - Non-Combustible
Thermal resistance ASTM C518 (C177)
ASTM C518 (C177)  R-value / inch @ 75ºF - 4.2 hr.ft2.F/Btu
  RSI value / 25.4 mm @ 24ºC - 0.75 m2K/W
Acoustical Performance ASTM C423
Thickness 125 Hz 250 Hz 500 Hz 1000 Hz 2000Hz 4000 Hz NRC
1.5" 1.19 0.55 1.03 1.06 1.02 1.01 0.9
2" 0.26 0.71 1.14 1.09 1.04 1.03 1
3" 0.72 0.93 0.88 0.84 0.9 0.97 0.9
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ASTM C612 Mineral Fiber Block and Board Thermal Insulation - Type IVB Compliant
236 - 05 - M MEA Approval, New York City Approval
CAN/ULC S702 For information on CAN/ULC S702 compliance, contact ROCKWOOL Technical Support
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ASTM C303   Density (thickness: 1", 1.5") Monolithic Density of 5.3 lb/ft³ (85 kg/m³)
Density (thickness ≤ 2") Monolithic Density of 4.4 lb/ft³ (70 kg/m³)
Density (thickness ≥ 2.5") Dual-Density - 6.2 lb/ft³ (100 kg/m³) outer layer and 4.1 lb/ft³ (65 kg/m³) inner layer
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24" x 48" (610 mm x 1219 mm)
16" x 48" (406 mm x 1219 mm)
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1" (25.4 mm) to 6" (152.4 mm)
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ASTM E84 (UL 723) Flame spread index = 0 ; Smoke developed index = 0
CAN/ULC S102 Flame spread index = 0 ; Smoke developed index = 0
CAN/ULC S114 Determination of Non-Combustibility of Building Materials - Non-Combustible
ASTM E136 Behavior of materials at 750°C - Non-Combustible
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ASTM C518 (C177)  R-value / inch @ 75ºF - 4.2 hr.ft2.F/Btu
  RSI value / 25.4 mm @ 24ºC - 0.75 m2K/W
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Thickness 125 Hz 250 Hz 500 Hz 1000 Hz 2000Hz 4000 Hz NRC
1.5" 1.19 0.55 1.03 1.06 1.02 1.01 0.9
2" 0.26 0.71 1.14 1.09 1.04 1.03 1
3" 0.72 0.93 0.88 0.84 0.9 0.97 0.9
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