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Dow® THERMAX™ Exterior Insulation at CBSI

For customers across VA, MD, DE, NJ, PA, and Washington D.C.

Dow® Building Solutions has been raising the roof on product quality and customer expectations in the building materials industry for more than 70 years, providing “excellence – from the ground up”. With advocacy, expertise, and innovation, every effort is focused on developing products that deliver ever-greater sustainability, durability, efficiency, comfort, health, and safety for customers.

Capitol Building Supply Inc. is committed to providing the highest quality construction supplies. Dow THERMAX™ exterior insulation products are available for pickup at any of our yards in Virginia, Maryland, Delaware, New Jersey, Pennsylvania, or Washington, D.C., or can be delivered directly to your commercial or residential jobsites.

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

Exterior Insulation in VA, MD, DE, NJ, PA, and D.C.

For all your commercial building projects, CBSI provides a full line of Dow® THERMAX brand exterior insulation products to construction pros in the Mid-Atlantic region and beyond, including:

The THERMAX™ Wall System

Dow’s patented THERMAX Wall System incorporates water, air, and thermal protective barriers into one streamlined product to help customers get the most out of their insulation investments.

The THERMAX Wall System is:

  • Economical: offering a simplified installation process that saves time and money at the jobsite
  • Conscientious: providing long-lasting thermal protection that contributes to a variety of LEED credits
  • Protected: guaranteeing a 6-month warranty for exposure, and a 15-year warranty for thermal and water resistance
  • Certified: meeting both ASHRAE and IBC requirements where applicable

The THERMAX Wall System is also compatible with the following three key Dow exterior insulation systems.

THERMAX™ (ci) Exterior Insulation

Dow’s mid-range insulation has a foil facing and offers dependable mid-range durability. Its moderate price point caters to the needs of a variety of Mid-Atlantic builders and developers.

THERMAX XARMOR™ (ci) Exterior Insulation

This continuous insulation system is installed behind exterior rain screens and features a unique dark-colored facer. It is a robust solution designed for use in strenuous jobsite conditions.

THERMAX™ Sheathing

Dow’s protective sheathing insulation is constructed from rigid foam board, designed to combat moisture. It offers condensation protection for a variety of Mid-Atlantic building scenarios.

In addition to the THERMAX Wall System and its complementary systems, Dow offers a variety of other related insulation products and options, including:

  • THERMAX™ Light duty insulation
  • THERMAX™ Heavy duty insulation
  • THERMAX™ Exterior insulation
  • THERMAX™ White finish insulation
  • THERMAX™ Metal building board

CBSI can help you make sense of your THERMAX insulation options and guide you in determining the best choice for your local construction jobs. Give us a call or stop by our yard today to get advice from our trained experts.

Buy Dow THERMAX Sheathing at CBSI in VA, MD, DE, NJ, PA, and D.C.

Mid-Atlantic builders and construction pros - learn more about the THERMAX sheathing system by Dow, or start your order now. Capitol Building Supply, Inc. is here to help.

Find a CBSI Location Near You

About Capitol Building Supply, Inc.

Capitol Building Supply is a proud member of the GMS family of companies. Serving both commercial and residential customers, we offer the largest inventory of construction supplies in Virginia, Maryland, Delaware, New Jersey, Pennsylvania, and Washington D.C. 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 Mid-Atlantic construction needs covered.

About Dow

Dow never stops evolving. In fact, adapting to change and responding to the challenge with innovation has been the standard operating procedures for over a century. Striving to solve the greatest challenges in the built environment while improving communities worldwide with safer, more affordable, and sustainable building solutions has made Dow a trusted leader in the industry and community worldwide.

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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

Capitol Building Supply carries a full range of commercial and residential construction supplies, and our crews are fully trained to deliver to all sites.

Our Locations

Our delivery fleet is dispatched from 19 locations including two yards in Delaware (Dover, Selbyville), eight yards in Maryland (Baltimore, Beltsville, Bladensburg, Forestville, Frederick, Gaithersburg, Hagerstown, Upper Marlboro), one yard in New Jersey (Camden), one yard in Pennsylvania (Harrisburg), six yards in Virginia (Manassas, Marshall, Springfield, Stafford, Vienna, Winchester), and one yard in Washington, D.C.

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.