Exterior Walls Insulation

Frontrock

ROCKWOOL Frontrock™ products are semi-rigid dual density and non-combustible stone wool insulation boards engineered to be used in mechanically-fastened exterior insulation finish system (EIFS) designs.

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Specification & sizes

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ComplianceASTM C612 - CAN/ULC S70
ASTM C612Mineral Fiber Block and Board Thermal Insulation - Type IVA Compliant
CAN/ULC S70Mineral Fibre Thermal Insulation for Buildings - Type 1 Compliant
DensityASTM C303
ASTM C303Density (for thicknesses of 1.5”, 2”)8.5 lbs/ft3 (136 kg/m3)
 Density (thickness ≥ 2.5”)9.3 lbs/ft3 (150 kg/m3) outer layer and 5.9 lbs/ft3 (95 kg/m3) inner layer
Dimensions
1.5” Thickness (38.1 mm) and 2” (50.8 mm) Length and width: 24” x 48” (609.6 mm x 1219.2 mm)
2.5” Thickness (63.5 mm), 3” (76.2 mm), 4” (101.6 mm), 5” (127 mm), 6” (152.4 mm) Length and width: 24” x 48” (609.6 mm x 1219.2 mm)
Reaction to fireASTM E84 (UL 723) - CAN/ULC S102 - CAN/ULC S114
Flame spread index = 0; Smoke developed index = 5 
Flame spread index = 0; Smoke developed index = 10 
Determination of Non Combustibility of Building Materials - Non Combustible
Temperature resistanceASTM C518 (C177)
ASTM C518 (C177)R-Value / inch @ 75oF
4 hr.ft2.F/Btu
 RSI value / 25.4 mm @ 24oC
0.70 m2K/W
Acoustical PerformanceASTM C423
Thickness125 Hz250 Hz500 Hz1000 Hz2000 Hz4000 HzNRC
1.5"0.170.510.971.010.950.950.85
3"0.500.750.950.970.990.990.90
Reaction to moistureASTM C1104 - ASTM E96 - ASTM C1338

For thicknesses of 1.5”, 2”

ASTM C1104Moisture Sorption - 0.28%
ASTM E96Water Vapor Transmission, Desiccant Method - 2710ng/Pa.s.m2 (47 perm)
ASTM C1338Determination of Fungi Resistance - Passed

For thickness ≥ 2.5

ASTM C1104Moisture Sorption - 0.25%
ASTM E96Water Vapor Transmission, Desiccant Method - 2187ng/Pa.s.m2 (38 perm)
ASTM C1338Determination of Fungi Resistance - Passed
Compressive strengthASTM C165
Thickness of 1.5", 2"940psf (45kPa) @ 10% compression
Thickness ≥ 2.5”627psf (30kPa) @ 10% compression
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ASTM C612Mineral Fiber Block and Board Thermal Insulation - Type IVA Compliant
CAN/ULC S70Mineral Fibre Thermal Insulation for Buildings - Type 1 Compliant
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ASTM C303Density (for thicknesses of 1.5”, 2”)8.5 lbs/ft3 (136 kg/m3)
 Density (thickness ≥ 2.5”)9.3 lbs/ft3 (150 kg/m3) outer layer and 5.9 lbs/ft3 (95 kg/m3) inner layer
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1.5” Thickness (38.1 mm) and 2” (50.8 mm) Length and width: 24” x 48” (609.6 mm x 1219.2 mm)
2.5” Thickness (63.5 mm), 3” (76.2 mm), 4” (101.6 mm), 5” (127 mm), 6” (152.4 mm) Length and width: 24” x 48” (609.6 mm x 1219.2 mm)
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Flame spread index = 0; Smoke developed index = 5 
Flame spread index = 0; Smoke developed index = 10 
Determination of Non Combustibility of Building Materials - Non Combustible
Back
ASTM C518 (C177)R-Value / inch @ 75oF
4 hr.ft2.F/Btu
 RSI value / 25.4 mm @ 24oC
0.70 m2K/W
Back
Thickness125 Hz250 Hz500 Hz1000 Hz2000 Hz4000 HzNRC
1.5"0.170.510.971.010.950.950.85
3"0.500.750.950.970.990.990.90
Back

For thicknesses of 1.5”, 2”

ASTM C1104Moisture Sorption - 0.28%
ASTM E96Water Vapor Transmission, Desiccant Method - 2710ng/Pa.s.m2 (47 perm)
ASTM C1338Determination of Fungi Resistance - Passed

For thickness ≥ 2.5

ASTM C1104Moisture Sorption - 0.25%
ASTM E96Water Vapor Transmission, Desiccant Method - 2187ng/Pa.s.m2 (38 perm)
ASTM C1338Determination of Fungi Resistance - Passed
Back
Thickness of 1.5", 2"940psf (45kPa) @ 10% compression
Thickness ≥ 2.5”627psf (30kPa) @ 10% compression
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Frontrock Exterior Insulation Finish System (EIFS)
Frontrock Exterior Insulation Finish System (EIFS)

ROCKWOOL Frontrock™ products are semi-rigid stone wool insulation boards that are non-combustible and fire resistant, and will not develop toxic smoke or promote flame spread, even when directly exposed to fire.

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