DuPont™ Thermax™ Wall System


An innovative way to achieve high performing results

The DuPont™ Thermax™ Wall System (TWS) is more than an insulated wall – it’s a systematic approach to achieving efficiency at every level: simplified design, streamlined construction and optimized energy consumption for a reduced carbon footprint.


Protect against moisture and condensation

Steel transfers heat amazingly fast – up to 300 times faster than wood studs and reduces the effective R-value of metal stud wall designs by 40–60%. The ASHRAE prescriptive continuous insulation requirements for steel-framed, above-grade walls recognize this phenomenon, and in most climate zones, call for a layer of continuous insulation (ci) to be added to the assembly to help stop the steel thermal shorts that can decrease the energy efficiency of the wall system.

To meet continuous insulation code requirements it is critical to also account for condensation within the wall assembly. Even if a wall is adequately designed to prevent liquid water from entering the assembly, condensation can still occur as a result of the interior and exterior temperatures as well as relative humidity.


A systematic approach

Thermax™ Wall System typical assembly

Typical assembly of the Thermax™ Wall System using Thermax™ XARMOR™ (ci) Exterior Insulation, LiquidArmor™ Flashing and Sealant, and the optional component of a DuPont™ approved spray foam.


DuPont’s complete system combines the strengths of powerhouse solutions to deliver a total package of benefits including:

The combined Wall System meets all applicable IBC and ASHRAE requirements for continuous insulation, moisture mitigation, air sealing, and vapor barriers. This system eliminates the need for exterior gypsum sheathing, applied air/vapor barrier membranes, and extensive site coordination, making it both cost effective and easy to install.


Industry leading system warranty

Thermax™ Wall System projects can be registered for our industry-leading system warranty, which includes peace of mind for water resistance, thermal properties, and exposure coverage.

TWS Gold

TWS Silver

TWS Bronze

Individual Components

Thermal Coverage

20 years

20 years

20 years

20 years

Water Resistance Coverage

15 years

10 years

5 years


Exposure Coverage

6 months

6 months

3 months


Product Combinations

Sample Warranty

Application Process


Simplicity and seamless building protection

Self-adhered with a felt top-sheet, new DuPont™ DuraGard™ CM Transition Flashing makes installation easy. This game-changing flashing seals critical transitions and interfaces that are key to achieving complete building envelope protection.

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Related Resources

Thermax™ Wall System Overview
The Thermax™ Wall System At a Glance
Guide Specification for Thermax™ Insulation for Exterior Walls
Thermax™ Wall System CAD Detail Set (PDF)
Thermax™ Wall System CAD Detail Set (DWG)
Tech Solutions 513.0 – DuPont™ Thermax™ Wall System
Installation Procedures for the DuPont™ Thermax™ Wall System

Customer spotlight

“The Thermax system has a LiquidArmor than can be (fluid) applied. I used that on recent projects, and I can see that lasting a good, long time….”  


– Paul Whitenack AIA, LEED ap | Manager, Building Science

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