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DuPont™ THERMAX™ Sheathing at Rocky Top Materials

For customers across Eastern Tennessee

A global giant in the development of engineered solutions across numerous industries, DuPont™ is also a recognized leader in the production of quality building materials. From their invention of the air and water barrier category more than 30 years ago, to innovations in insulation today, DuPont is continually focused on delivering products that help people advance.

Rocky Top Materials, Inc. is committed to stocking the best materials and support for all your commercial and residential projects. A full range of DuPont THERMAX insulation solutions are available* from Rocky Top Materials at our yards in Knoxville or Pigeon Forge, TN, or can be delivered directly to your commercial or residential jobsites.

Visit a showroom or search our inventory online to learn more.

*Inventory varies by location. Call your local yard to confirm specific product availability. If we do not have in stock at your local yard, we will be glad to order it for you.

DuPont THERMAX™ Sheathing

The THERMAX system is a rigid foam insulation that can be used for a variety of applications, including concealed and exposed applications as well as above and below grade. Valuable features include:

  • A glass-fiber-infused polyisocyanurate foam core that is laminated between aluminum facers on both sides
  • Class A fire rating
  • Low perm rating for reduced condensation
  • Variety of thicknesses (1/2" to 2") and R-values (3.3 to 13.0)
  • Square or shiplap edges

*THERMAX, a proud member of the DuPont family of brands, is a former brand of the Dow Chemical Company.

One Product, Many Insulation Applications

DuPont THERMAX sheathing can be used in both commercial and residential walls including non-vented crawl spaces, interior walls of metal buildings, and interior basement walls. It can be installed without a thermal barrier and can also be used with hourly rated assemblies. The sheathing’s reinforcing facers contribute to fire resistance and durability, as do its chemical modifiers.

Lightweight and easy to install, DuPont THERMAX can be easily cut using a knife or saw and can be installed on both walls and ceilings including girts, steel studs, block, wood, tilt-up, purlins, trusses and bar joints.

Buy DuPont THERMAX Insulation at Rocky Top Materials in TN

Tennessee builders and construction pros near Knoxville or Pigeon Forge – learn more about insulation solutions like THERMAX or start your order now Rocky Top Materials is here to help.

Find Your Yard Now

About Rocky Top Materials

Rocky Top Materials is a proud member of the GMS family of companies. Serving both commercial and residential customers, we offer a comprehensive inventory of construction supplies in eastern Tennessee. Our employees pride themselves on being hard working, safe and professional. Whether you need drywall, insulation, acoustical tile, tools, or other construction accessories, we've got your Tennessee construction needs covered.

About DuPont

Since 1802, DuPont has been setting the standard for excellence in industrial innovation. Today, the company is a diversified Fortune 50 leader, recognized and respected worldwide in multiple industries, including quality construction materials. DuPont works continuously with architects, builders, and installers on innovative insulation solutions for the next generation of new construction, and renovation of existing buildings.

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About Us

Teaming up with the top brands in the industry, we have one simple pledge: to get the right products into our customers' hands as quickly and safely as possible.

Our Services

Rocky Top Materials carries a full range of commercial and residential construction supplies, and our crews are fully trained to deliver to commercial sites.

Our Locations

Our delivery fleet is dispatched from two locations in Tennessee: Knoxville and Pigeon Forge.

Contact Us

For more information about how to contact us, visit our Find a Yard page. Or, click the Contact Us tab to send us an email.