Commercial | Exterior Wall | Interior Wall
Easy-to-install, multipurpose continuous insulation for the job at hand
Engineered for both concealed and exposed applications, DuPont™ Thermax™ Sheathing is an easy-to-use nonstructural rigid insulation board with a fiberglass-infused foam core that helps improve fire performance and dimensional stability.
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Thermax™ Sheathing
DuPont™ Thermax™ Sheathing is a multipurpose, nonstructural, rigid board insulation that is quick and easy to install in a wide range of exposed and concealed cavity wall applications. It consists of a glass-fiber-infused polyisocyanurate foam core laminated between 1.0-mil smooth, reflective aluminum facers on both sides. The glass fiber reinforcement contributes to improved fire performance and dimensional stability. DuPont™ Thermax™ Brand insulation delivers wall performance you can count on. It’s ready to meet your toughest building challenges – both outside and inside the wall – with a robust ISO insulation product line and an R-value that’s proven consistent over time and a range of temperatures.
Available Sizes
Standard Thermax™ insulation board dimensions are 4'x8'. Custom lengths are available up to 30'. Please contact your local DuPont representative for additional availability details or call our product support team at 1-833-338-7668
Features & benefits
| Long-term thermal resistance |
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| Easy to cut, handle, and install |
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| Use in exterior and interior applications |
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| Moisture resistant |
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| Seal with DuPont™ LiquidArmor™ and DuPont™ DuraGard™ CM |
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Physical Properties
| Method | Unit | Value | |
|---|---|---|---|
| R-Value (Thermal Resistance at 75°F Mean Temperature)<sup></sup> | ASTM C518 | ft2•hr•°F/Btu | 6.9 |
| R-Value (Thermal Resistance at 40°F Mean Temperature)<sup></sup> | ASTM C518 | ft2•hr•°F/Btu | 7.2 |
| Compressive Strength<sup>3</sup> | ASTM D1621 | Psi, min (kPa) | 25 (170) |
| Water Absorption<sup></sup> | ASTM C209 | % by volume, max. | 0.1 |
| Water Vapor Permeance<sup></sup> | ASTM E96 | perm, max | <0.01 |
| Flexural Strength<sup></sup> | ASTM C203 | Psi, min (kPa) | 40 (275) |
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