Exterior Walls

Solutions for the Entire Wall Envelope

Dow exterior wall solutions give you a systematic approach that works for your entire building envelope. Innovative yet easy-to-install, our exterior insulations systems and sealants are helping architects and contractors deliver high-performance buildings of all types.

LEED hotel during construction using THERMAX Wall System

A Systematic Approach

Maximize performance through proven solutions, minimize risk of moisture damage and simplify construction for reduced labor costs and resource needs. Our wall systems for commercial construction incorporates the latest in building science with cutting edge technologies. Made up of continuous exterior insulation boasting high insulating value and integrated, game-changing weatherization and air barrier solutions, we provide architects more design flexibility than ever.


building face

Building Code Guides

Our self-service resources can help guide you to determine the best design strategies and most efficient building materials to meet your project needs. There are hundreds of assemblies with our range of technologies passing the United States NFPA 285 assembly test. We've combined a variety of approved assemblies to help you determine the best insulation choice for your construction needs. Similarly, our self-guided Code Assessment Engine for Canada navigates the Canadian building code logic to compare above grade wall strategies for building materials and design methods. Choose your region to get started:

US NFPA 285 Wall Assembly Wizard Canadian Code Assessment Engine

Insulation being installed on an exterior wall.

Exterior Continuous Insulation

A continuous layer of rigid insulation is the preferred wall solution for providing the ultimate above-grade wall protection. By insulating the entire exterior wall span – not just the space between wall studs –thermal bridging is minimized and energy efficiency maximized.

Dow offers a range of high-performance exterior insulation products that provide the following benefits:

  • High, long-term R-value
  • Exceptional moisture resistance
  • Excellent compressive strength
  • Long-term durability and performance
  • Compatible with variety of building types
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Dow insulation being sprayed with LiquidArmor.

Exterior Weatherization

Preventing water and vapor from entering through exterior walls is critical for a long-lasting high-performing envelope. As part of a systematic approach to wall building, Dow’s weatherization solutions are designed to integrate with our portfolio of exterior wall solutions, contributing to your entire building envelope.

For buildings using continuous exterior insulation, we offer application-specific weatherization products to effectively keep moisture from entering the building envelope. LIQUIDARMOR™ is a liquid flashing solution for sealing board joints as well as wall punctures like doors, windows and piping.

When continuous, rigid insulation is not an option or is not enough because a secondary water-resistive barrier is desired, house wrap solutions from Dow are your best choice. WEATHERMATE™ House wrap is a woven, perforated, polyolefin-based house wrap that is both tough and tear resistant and can be installed over non-insulated sheathing in residential construction to reduce air and moisture intrusion.

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Thermax xarmor installed on an exterior wall.

Exterior Air Sealing

The small air leaks and cracks found in a typical home or building can add up to big energy losses and serious moisture damage. Whether air sealing during new construction or sealing an existing structure, Dow’s range of insulating foam sealants are a quick and convenient solution for closing exterior gaps in your building envelope.

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Skyscraper under construction with exterior insulation being applied.


Exterior Insulation and Finish Systems (EIFS) or External Thermal Insulation Composite Systems (ETICS) as they are also known, are proprietary, multi-layered exterior wall systems that are increasingly popular with architects and owners because they improve energy savings, reduce costs and provide tremendous design versatility.

Solutions like DOW™ XNERGY™ rigid insulation or STYROFOAM™ Brand Panel Core Insulation are key to EIF's excellent energy efficiency, durability and moisture resistance.

Using Dow insulation, architects designing EIFS assemblies are provided with a reliable single-source solution for the air and water-resistive barrier, continuous insulation and exterior wall finish.

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