Exterior Walls Insulation

ROCKWOOL Frontrock™

ROCKWOOL Frontrock™ products are semi-rigid non-combustible stone wool insulation boards designed for use in mechanically-attached exterior insulation and finish system (EIFS) applications. 

Frontrock is a component of tested and certified EIFS in the U.S. market. For information on both U.S. and Canadian systems.

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Specification & sizes

Compliance ASTM C612 – Type IVA Compliant, CAN/ULC S702 – Type 1 Compliant
ASTM C612 Mineral Fiber Block and Board Thermal Insulation - Type IVA Compliant
CAN/ULC S702 Mineral Fibre Thermal Insulation for Buildings - Type 1 Compliant
Density Product density will change between monolithic and dual density versions

Monolithic Density (for thicknesses of 1.5”, 2”)

Thicknesses 1.5”(38.1 mm), 2”(50.8 mm), 2.5”(63.5 mm), 3”(76.2 mm), 4”(101.6 mm), 5”(127 mm)

Length and width: 24” x 48” (609.6 mm x 1219.2 mm)

Dual Density (thickness ≥ 2.5”)

Thicknesses 2.5”(63.5 mm), 3”(76.2 mm), 3.5”(88.9 mm), and 4”(101.6 mm)

Length and width: 24” x 48”(609.6 mm x 1219.2 mm)

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 fire ASTM E84 (UL 723) - CAN/ULC S102 - CAN/ULC S114 ASTM E136
ASTM E84 (UL 723) Flame spread index = 0; Smoke developed index = ≤ 15 (Class A)
CAN/ULC S102

Flame spread index = 0; Smoke developed index = ≤ 10 (Class A)

CAN/ULC S114

Determination of Non Combustibility of Building Materials - Non-Combustible

ASTM E136

Behaviour of materials at 750°C - Non-Combustible

Temperature resistance Thermal Resistance R-value / inch @ 75ºF – 4.0 hr.ft2.F/Btu
ASTM C518 (C177) R-Value / inch @ 75oF
4 hr.ft2.F/Btu
  RSI value / 25.4 mm @ 24oC
0.70 m2K/W
Acoustical Performance ASTM C423
Thickness 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz NRC
1.5" 0.17 0.51 0.97 1.01 0.95 0.95 0.85
3" 0.50 0.75 0.95 0.97 0.99 0.99 0.90
Reaction to moisture ASTM C1104 - ASTM E96 - ASTM C1338

Monolithic Density (min 1.5”)

ASTM C1104 Moisture Sorption - 0.28% by weight, 0.04% by volume
ASTM E96 Water Vapor Transmission, Desiccant Method - 2710ng/Pa.s.m2 (47 perm)
ASTM C1338 Determination of Fungi Resistance - Passed

Dual Density (≥ 2.5”)

ASTM C1104 Moisture Sorption - 0.25% by weight, 0.04% by volume
ASTM E96 Water Vapor Transmission, Desiccant Method - 2187ng/Pa.s.m2 (38 perm)
ASTM C1338 Determination of Fungi Resistance - Passed
Compressive strength ASTM C165
Monolithic Density (min 1.5”) 940psf (45kPa) @ 10% compression
Dual Density (≥ 2.5”)

627psf (30kPa) @ 10% compression

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ASTM C612 Mineral Fiber Block and Board Thermal Insulation - Type IVA Compliant
CAN/ULC S702 Mineral Fibre Thermal Insulation for Buildings - Type 1 Compliant
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Monolithic Density (for thicknesses of 1.5”, 2”)

Thicknesses 1.5”(38.1 mm), 2”(50.8 mm), 2.5”(63.5 mm), 3”(76.2 mm), 4”(101.6 mm), 5”(127 mm)

Length and width: 24” x 48” (609.6 mm x 1219.2 mm)

Dual Density (thickness ≥ 2.5”)

Thicknesses 2.5”(63.5 mm), 3”(76.2 mm), 3.5”(88.9 mm), and 4”(101.6 mm)

Length and width: 24” x 48”(609.6 mm x 1219.2 mm)

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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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ASTM E84 (UL 723) Flame spread index = 0; Smoke developed index = ≤ 15 (Class A)
CAN/ULC S102

Flame spread index = 0; Smoke developed index = ≤ 10 (Class A)

CAN/ULC S114

Determination of Non Combustibility of Building Materials - Non-Combustible

ASTM E136

Behaviour of materials at 750°C - 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
Thickness 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz NRC
1.5" 0.17 0.51 0.97 1.01 0.95 0.95 0.85
3" 0.50 0.75 0.95 0.97 0.99 0.99 0.90
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Monolithic Density (min 1.5”)

ASTM C1104 Moisture Sorption - 0.28% by weight, 0.04% by volume
ASTM E96 Water Vapor Transmission, Desiccant Method - 2710ng/Pa.s.m2 (47 perm)
ASTM C1338 Determination of Fungi Resistance - Passed

Dual Density (≥ 2.5”)

ASTM C1104 Moisture Sorption - 0.25% by weight, 0.04% by volume
ASTM E96 Water Vapor Transmission, Desiccant Method - 2187ng/Pa.s.m2 (38 perm)
ASTM C1338 Determination of Fungi Resistance - Passed
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Monolithic Density (min 1.5”) 940psf (45kPa) @ 10% compression
Dual Density (≥ 2.5”)

627psf (30kPa) @ 10% compression

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Tools, Guides & Downloads

 

 

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Frontrock Exterior Insulation Finish System (EIFS) - Data Sheet
Frontrock Exterior Insulation Finish System (EIFS) - Data Sheet

Semi-rigid and non-combustible stone wool insulation boards engineered to be used in mechanically-fastened exterior insulation finish system (EIFS) designs.

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EIFS Application Guide
EIFS Application Guide

Exterior Insulation Finishing System (EIFS) Application Guide

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Dimensional Stability of Rigid Board Insulation Products
Dimensional Stability of Rigid Board Insulation Products

Rigid foam insulation products (EPS, XPS and ISO) are dimensionally affected with changes in temperature. Stone wool insulation, on the other hand, has negligible expansion and contraction when compared to these other insulation types.

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