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Metal Building Exterior Walls Insulation

ROCKWOOL ROXUL Safe® 55 & 65

ROXUL Safe® 55 & 65 are medium-density insulation products designed for exterior and interior non-load-bearing, steel-faced firewall applications where a fire resistance of at least one hour is required. ROXUL Safe® 65 holds a fire-resistance rating of one hour, while ROXUL Safe® 55 holds a fire-resistance rating of two hours—both from the interior side.

Download 55 data sheet Download 65 data sheet
Download 55 data sheet Download 65 data sheet
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ROXUL SAFE™ 55 & 65 are medium-density insulation products designed for exterior and interior non-load-bearing, steel-faced firewall applications where a fire resistance of at least one hour is required

ROXUL Safe® 65 holds a fire-resistance rating of one hour, while ROXUL Safe® 55 holds a fire-resistance rating of two hours—both from the interior side. Both products allow builders to reduce the required separation between buildings and increase the area of buildings in close proximity to each other. 

Properties:

  • Lightweight
  • Easy to install insulation and construct firewall design
  • Fire-resistance at zero lot line clearance
  • Non-combustible with melting point of approximately 1177°C (2150°F)
  • Dimensionally stable
  • Performs over wide temperature ranges
  • Energy-saving performance: both ROXUL SAFE™ 65 and ROXUL SAFE® 55 have an R-value of 4.2 hr.ft2.F/Btu per inch at 75ºF
  • Non-corrosive
  • Does not rot or promote the growth of mildew, fungi or bacteria
  • ROCKWOOL® can contribute to earning LEED® points
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Specification & sizes

Compliance ASTM C612
ASTM C612 Mineral Fiber Block and Board Thermal Insulation - Type IVB Compliant
ULC Listed
Classified UL
Density ASTM C303
ASTM C303 Nominal Density, Minimum - 4.5 lb/ft³ (72 kg/m³)
Dimensional stability ASTM C356
ASTM C356 Linear Shrinkage - <1% @ 1200°F 
Dimensions
24" x 48" (610 mm x 1219 mm)
31.5" x 48" (800 mm x 1219 mm)
32" x 48" (813 mm x 1219 mm)
Thickness
Product is available in 4” thickness (101.6 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 Test for Non-Combustibility - Non-Combustible
ASTM E136 ULC 2 hr rated from interior side - W606
ASTM E136 ULC 2 hr rated from both sides - W611
ASTM E136 UL 2 hr rated from interior side - U655
ASTM E136 UL 2 hr rated from both sides - U659
ASTM E136 Consult UL and ULC Directories for fire rated designs
Thermal resistance ASTM C518 (C177)
ASTM C518 (C177) R-value / inch @ 75ºF - 4.2 hr.ft2.F/Btu
ASTM C518 (C177) RSI value / 25.4 mm @ 24ºC - 0.74 m2K/W
Reaction to moisture ASTM C1104 - ASTM C1338
ASTM C1104 Moisture Sorption - 0.04%
ASTM C1338 Determination of Fungi Resistance - Passed
Corrosion Resistance ASTM C795 - ASTM C665
ASTM C795 Stress Corrosion Cracking Tendency of Austenitic Stainless Steel - Passed
ASTM C665 Corrosion of Steel - Passed 
Back
ASTM C612 Mineral Fiber Block and Board Thermal Insulation - Type IVB Compliant
ULC Listed
Classified UL
Back
ASTM C303 Nominal Density, Minimum - 4.5 lb/ft³ (72 kg/m³)
Back
ASTM C356 Linear Shrinkage - <1% @ 1200°F 
Back
24" x 48" (610 mm x 1219 mm)
31.5" x 48" (800 mm x 1219 mm)
32" x 48" (813 mm x 1219 mm)
Back
Product is available in 4” thickness (101.6 mm)
Back
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 Test for Non-Combustibility - Non-Combustible
ASTM E136 ULC 2 hr rated from interior side - W606
ASTM E136 ULC 2 hr rated from both sides - W611
ASTM E136 UL 2 hr rated from interior side - U655
ASTM E136 UL 2 hr rated from both sides - U659
ASTM E136 Consult UL and ULC Directories for fire rated designs
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ASTM C518 (C177) R-value / inch @ 75ºF - 4.2 hr.ft2.F/Btu
ASTM C518 (C177) RSI value / 25.4 mm @ 24ºC - 0.74 m2K/W
Back
ASTM C1104 Moisture Sorption - 0.04%
ASTM C1338 Determination of Fungi Resistance - Passed
Back
ASTM C795 Stress Corrosion Cracking Tendency of Austenitic Stainless Steel - Passed
ASTM C665 Corrosion of Steel - Passed 
Back

Tools, Guides & Downloads

 

 

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ROXUL SAFE™ 55 & 65 and ROCKWOOL PLUS™ MB Insulation for Pre-Engineered Metal Buildings
ROXUL SAFE™ 55 & 65 and ROCKWOOL PLUS™ MB Insulation for Pre-Engineered Metal Buildings

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ROCKWOOL ROXUL SAFE Application Guide
ROCKWOOL ROXUL SAFE Application Guide

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Guidelines for Cutting Stone Wool Insulation
Guidelines for Cutting Stone Wool Insulation

This document provides essential steps and best practices for cutting ROCKWOOL stone wool insulation. It includes information on preparation, recommended tools, safety measures, and cutting techniques to ensure accurate and clean cuts. These guidelines help maintain the material's performance and integrity, making it suitable for both professionals and DIY users.

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ROXUL Safe® 55 Metal Building Insulation - Data Sheet
ROXUL Safe® 55 Metal Building Insulation - Data Sheet

Stone wool insulation boards for exterior and interior non-load-bearing, steel-faced firewall applications where a fire resistance rating is required. It is approved for use in a 2-hour fire-rated system.

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ROXUL Safe® 65 Metal Building Insulation - Data Sheet
ROXUL Safe® 65 Metal Building Insulation - Data Sheet

Stone wool insulation boards for exterior and interior non-load-bearing, steel-faced firewall applications where a fire resistance rating is required. It is approved for use in a 1-hour fire-rated system.

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ROXUL Safe® Fire Safing Insulation - Data Sheet
ROXUL Safe® Fire Safing Insulation - Data Sheet

Semi-rigid, stone wool batt insulation that provides fire-stopping and acoustical properties. It is approved for use in fire rated joints, through penetrations and perimeter fire containment systems.

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Safe Use Instruction Sheet
Safe Use Instruction Sheet

This document is provided by ROCKWOOL to communicate recommended safe handling and use instructions.

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Questions? Contact Us

If you have technical questions about products or need support for your project, our technical experts are here to help you.

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