Owens Corning

THE #1 SPECIFIED BRAND OF COMMERCIAL MINERAL WOOL*

Thermafiber® is the leading manufacturer of mineral wool insulation. As the pioneers of perimeter fire containment, we have over 89 years of experience dedicated to improving fire protection, thermal performance, and sound control. While every project is unique, Thermafiber® has cultivated decades of experience collaborating with partners across the industry to develop, test, and deploy mineral wool insulating solutions. Thermafiber® offers a range of mineral wool products for commercial, industrial, and residential applications. Making it the top choice for AEC professionals in various building projects*. 

*Dodge Data & Analytics Spec Rates, 2022
ThermaFiber Mineral Wool Insulation

Experience

For nearly a half-century, Thermafiber® has pioneered advances in perimeter fire containment and life safety systems.

Sustainability

Thermafiber® introduced the first formaldehyde-free mineral wool to the market, supporting safety and sustainability.

Trust

4 out of 5 of the tallest buildings in North America trust Thermafiber® mineral wool for their insulation needs. 

Expertise

The Thermafiber InSolutions® team supports AEC professionals in evaluating, designing, informing, testing, and deploying perimeter fire containment assemblies. 

Safety

Thermafiber® insulation is the first and only mineral wool to earn the Department of Homeland Security’s Safety Act designation. Read more about the Safety Act.

Born in Fire

Thermafiber® creates mineral wool from natural and raw materials including rock and blast furnace slag, a byproduct of the steel industry. Melting materials at temperatures above 2600° F and spinning them into fibers creates our mineral wool insulation.

Why Mineral Wool?

Our mineral wool contains a minimum of 70% recycled content and is non-combustible, inorganic and mold-resistant. Thermafiber® is the #1 specified brand of commercial mineral wool.

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Non-Combustible

Our mineral wool insulation resists fire and temperatures in excess of 2,000˚F while also providing sound control and energy conservation. 

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Sustainability

With 70% minimum Recycled Content, Thermafiber® contributes to LEED® building programs. 

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Water-Resistance

Mineral wool allows the vapor barrier to perform without creating additional traps for moisture in the wall cavity. 

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Mold-Resistant

Our mineral wool insulation resists mold and fungi and is vermin-proof because it is being made of inorganic material. 

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Ease of Installation

As a semi-rigid product that is easy to cut and install, our mineral wool insulation’s flexibility allows it to conform to building shapes and construction irregularities.

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Decades of leadership in curtain wall fire containment systems

Perimeter Fire Containment System Selector

Thermafiber pioneered the testing of curtain wall fire containment in 1971 and continues to raise the bar with new tests each year. Our newest innovation, the Impasse® curtain wall insulation system, overlaps components during installation to lock in the fire barrier, virtually eliminating the possibility of insulation materials becoming dislodged by fire’s turbulent forces.

Explore The PFC System Selector

TECHNICAL CONSULTING TEAM

Thermafiber Insolutions®

The Thermafiber Insolutions® team provides perimeter fire containment solutions to fit the unique design needs of today’s innovative commercial buildings.

This five-step approach saves time and budget on projects, while delivering excellent performance that meets demanding building standards:

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Free Engineering Judgment
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Our 5-pronged approach to improving building safety

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All-Phase Consultation & Technical Expertise

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High-performing Products & Systems

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Cost-saving Insulation Hanger Systems

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Labor-Saving Systems

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Contributing to Green Building Credits

Now Available

News & Updates

Thermafiber® Crimped Backpan PFC System

Thermafiber® Crimped Backpan Perimeter Fire Containment System is designed with a crimped interior backpan that simplifies installation and allows for easier visual identification of system components during inspection. The configuration of the steel creates a ledge that provides reinforcement, which eliminates the need for a backer reinforcement member, and provides support against fire propagation and smoke migration.

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Thermafiber® RainBarrier® Dark product photo

Thermafiber® RainBarrier® Dark

Thermafiber® RainBarrier® Dark provides standout performance designed to blend in. 
The performance and moisture resistance of Thermafiber® RainBarrier® continuous insulation, now with a black facing, eliminates the need for additional camouflage for field installation in open joint and rainscreen applications.

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Thermafiber® Fire & Sound Guard® Plus product photo

Thermafiber® Fire & Sound Guard® Plus

Thermafiber® Fire & Sound Guard® Plus is the first hybrid mineral wool batt insulation that offers thermal performance, noise control and fire resistance for both interior and exterior walls, floors and ceilings for residential and light commercial construction applications.

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Thermafiber® Impasse® Zero Spandrel PFC System product photo

Thermafiber® Impasse® Zero Spandrel PFC System

Thermafiber® Impasse® Zero Spandrel PFC System is a revolutionary perimeter fire containment system designed for floor-to-ceiling glass curtain walls. This product combines the safety profile durability of new Thermafiber® FireSpan® 120 mineral wool insulation with the innovative new Thermafiber® Impasse® 2.0 Hangers for easier installation and industry-leading performance.

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When Life Safety Matters Most

Perimeter Fire Containment

A proper fire containment system helps save buildings, intellectual property, business capital, and the people inside the structure. Owens Corning® Thermafiber® is committed to providing solutions that help commercial building professionals confidently design, specify, and install durable, safe commercial structures. 

Explore Fire Containment

Thermafiber® Document library

Need a document fast? Explore our comprehensive Thermafiber® document library for all your mineral wool insulation needs.

Here you'll find product guides, technical data sheets, and more -- all in one place. 

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COMMERCIAL MINERAL WOOL PRODUCTS

You Demand the Best, So We Delivered the First

As North America’s first formaldehyde-free mineral wool insulation, the new Thermafiber® mineral wool insulation solutions represent a breakthrough for architects, specifiers, and contractors interested in achieving green building standards. 

The expansion of the formaldehyde-free Thermafiber® mineral wool insulation strengthens the impressive portfolio of industry-leading products and services. 

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Project Spotlight

Owens Corning's Thermafiber® mineral wool insulation stands out for its unique qualities and enduring stability, making it a preferred choice for some of the world's largest and most prestigious buildings. 


Petronas Towers

Petronas Towers - Kuala Lumpur, Malaysia

The Petronas Towers in Malaysia installed an innovative perimeter fire containment assembly using Thermafiber® FireSpan® and Thermafiber® Safing. This fire containment assembly helped achieve outstanding floor-to-floor fire separation, meeting stringent building code fire requirements.
View Portfolio PDF | 743.3 KB



Goodyear World Headquarters

Goodyear World Headquarters - Akron, USA

With a minimum of 70% recycled content, the installed Thermafiber® products in the Goodyear World Headquarters - Akron, USA.
View Portfolio PDF | 473.75 KB


Burj Khalifa

Burj Khalifa - Dubai, U.A.E.

View Portfolio PDF | 1.35 MB


One World Trade Center

One World Trade Center - New York, USA

One World Trade Center implemented an innovative, high-performance Thermafiber® Impasse® perimeter fire containment assembly. Thermafiber® FireSpan®, Thermafiber® Impasse® Hangers, and Thermafiber® Safing were installed to achieve outstanding floor-to-floor fire separation in compliance with building code fire requirements and SAFETY Act designation from the U.S. Department of Homeland Security.
View Portfolio PDF | 1.28 MB


Taipei 101

Taipei 101 - Taipei, Taiwan

View Portfolio PDF | 2.09 MB


Bullitt Center

Bullitt Center - Seattle, USA

The Bullitt Center in Seattle opted for Thermafiber® RainBarrier® 45 Continuous Insulation, EcoTouch® PINK® FIBERGLAS™ Insulation, and QuietR® Rotary Duct Liner. These choices aimed to conserve energy, enhance acoustics, and simplify installation. The Bullitt Center is Certified Living by the International Living Future Institute’s Living Building Challenge, the world’s most rigorous proven performance standard for buildings.
View Portfolio PDF | 1.84 MB


Edith Green Wendell Wyatt Federal Building

Edith Green Wendell Wyatt Federal Building - Portland, USA

The Edith Green Wendell Wyatt Federal Building in Portland, USA contributed to valuable LEED® credits, helping the building earn a LEED® Platinum certification. Whether used independently or in combination, Thermafiber® insulation products enhance the comfort, safety, and sustainability of any facility. 
View Portfolio PDF | 1.01 MB


University of Michigan, north quad

University of Michigan, North Quad - Ann Arbor, USA

View Portfolio PDF | 1.65 MB


Residential Mineral Wool Products

Outstanding Fire Resistance

Mineral wool insulation is made from rock and blast furnace slag. The raw materials are melted in a furnace at temperatures above 2,600°F. The molten substance is spun into billions of fibers, which are formed into insulating blankets with a high recycled content that provide fire resistive characteristics, thermal insulation, and sound control. 

Why insulate with Thermafiber® Mineral Wool? Owens Corning mineral wool offers easy installation at any temperature, requiring minimal personal protective equipment. This versatile solution provides exceptional thermal, acoustical, and fire-resistant properties all in one product, making it a comprehensive choice for insulation needs.  

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Residential Applications

Learn more about the entire suite of Owens Corning mineral wool products for residential applications, which include: 

  • Attics
  • Basements
  • Ceilings
  • Floors
  • Walls
Explore Residential Products

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