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Owens Corning


Mineral Wool Insulation

Born in Fire

Thermafiber® is a leading manufacturer of Mineral Wool insulation products. From its inception, Thermafiber® has been dedicated to improving fire protection by manufacturing mineral wool insulation. Thermafiber® offers industrial, residential, and marine mineral wool products that conserve energy, control sound, and provide fire protection.

While every commercial, industrial, and mechanical project is unique, Thermafiber® has cultivated more than 45 years of experience collaborating with partners across the industry to develop, test and deploy mineral wool insulating solutions.

ThermaFiber Mineral Wool Insulation

Newly Launched High Compressive Strength Products

The Owens Corning® Thermafiber® RainBarrier® High Compressive portfolio uses ThermaCrimp™ technology to make the highest compressive strength mineral wool on the market.

Benefits of Mineral Wool The #1 Specified Brand of Commercial Mineral Wool*

What distinguishes Thermafiber® from all other mineral wool products on the market? Here are five reasons why AEC professionals including architects, engineers and contractors choose Thermafiber® for their commercial, industrial and mechanical building projects.

*Dodge Data & Analytics Spec Rates, Q1 2018-Q1 2019


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


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


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


The Thermafiber InSolutions® team supports AEC professionals to evaluate, design, inform, test and deploy perimeter fire containment assemblies.


Thermafiber® is the first mineral wool to earn the Department of Homeland Security’s Safety Act designation.

Why Mineral Wool?

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


Resists fire and temperatures in excess of 2,000˚F while also providing sound control and energy conservation.


70% minimum Recycled Content contribute to LEED® building programs.


Allows the vapor barrier to perform without creating additional traps for moisture in the wall cavity.


Resists mold, fungi, and is vermin proof due to its being an inorganic material.

Ease of Installation
Ease of Installation

As a semi-rigid product that is easy to cut and install, its flexibility allows it to conform to building shapes and construction irregularities.

Commercial Mineral Wool Products You Demand the Best, So We Delivered the First

As the first formaldehyde-free mineral wool insulation in North America, 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.

Featured Projects ThermaFiber Insolutions®

Thermafiber Insolutions® is a five-pronged approach to providing innovative insulation products and services to architects, specifiers, contractors and building facade manufacturers. Insolutions helps you protect your building, while saving time, saving money and installing formaldehyde-free mineral wool that withstands temperatures above 2,000°F (1,093°C).

Helps save time and money while protecting your reputation on every project with:

ThermaFiber Case Studies
All-Phase Consultation

Including product recommendations, CADE drawings and engineering judgements.

Fire Safety

Identify installation techniques to help provide the highest level of fire safety.

High-performance products

Safe and sustainable insulation, contributing to LEED credits and energy conservation

Labor-Saving Customization and Packaging

To suit your project requirements and time on the job site.

SAFETY Act Liability Protection

Thermafiber® mineral wool insulation products and their supporting design and installation services, Thermafiber Insolutions® earns SAFETY Act Designation from the U.S. Department of Homeland Security.

Petronas Towers
Petronas Towers Kuala Lumpur, Malaysia
Goodyear World Headquarters
Goodyear World Headquarters Akron, USA
Burj Khalifa
Burj Khalifa Dubai, U.A.E.
1 World Trade Center
1 World Trade Center New York, USA
Taipei 101
Taipei 101 Taipei, Taiwan
Bullitt Center
Bullitt Center Seattle, USA
Edith Green Wendell Wyatt Federal Building
Edith Green Wendell Wyatt Federal Building Portland, USA
University of Michigan
University of Michigan, North Quad Ann Arbor, USA
University of Washington Bothell
University of Washington Bothell, Discovery Center Bothell, WA

Industrial Mineral Wool Products Mechanical Solutions for Industrial Applications

Thermafiber® Industrial Mineral Wool Insulation is designed for high temperatures in process industry and fire-resistant applications. Our products are designed to perform in extreme conditions, maintain process temperatures, conserve energy, and reduce noise. They are suitable for temperatures up to 1200F (649C).

Factory at Sunset

Industrial Applications

  • Mechanical Rooms
  • Piping
  • Flatwork
  • Boilers
  • Furnaces
  • Ovens
  • Kilns
  • Vessels
  • Columns
  • Tanks

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? It can be installed easily and at any temperature; requires minimal personal protective equipment to install; provides excellent thermal, acoustical and fire-resistive properties in one product; and more.

A worker installs ThermaFiber mineral wool insulation
Residential Applications
  • Attics
  • Basements
  • Ceilings
  • Floors
  • Walls
More Products

Learn more about the entire suite of Owens Corning mineral wool products for residential applications.

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Find Our Residential Products