Commercial | Exterior 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.

 
 
 

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.

 
 
 

Features & benefits

Easy to cut, handle, and install
  • Easy to use
  • Moisture Resistant
  • Reduces the potential for condensation within the wall assembly (SH-533)
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    Physical Properties

      Method Unit Value
    Compressive Strength<sup>1</sup> ASTM D1621 Psi, min (kPa) 25 (170)
    Water Absorption<sup></sup> ASTM D2842 - 3.5
    ASTM C209 % by volume, max. 0.1
    Water Vapor Permeance<sup></sup> ASTM E96 perm, max (ng/Pa-s-m2) <0.03 (<15)
    Maximum Use Temperature<sup></sup> - °F 250
    Flexural Strength<sup></sup> ASTM C203 Psi, min (kPa) 40 (275)
    Tensile Strength<sup></sup> ASTM D1623 Psi, min (kPa) 24 (170)
    Dimensional Stability<sup></sup> ASTM D2126 % 0.2

    1Vertical compressive strength is measured at 10 percent deformation or at yield, whichever occurs first.

     
     
     

    Available Sizes

    R-Value Thickness (in.) Board Size (ft.)
    3.3 0.5 4 x 8
    5 0.75 4 x 8
    5 0.75 4 x 8
    6.5 1 4 x 8
    6.5 1 4 x 8
    9.8 1.5 4 x 8
    9.8 1.5 4 x 8
    9.8 1.5 4 x 8
    10.1 1.55 4 x 8
    10.1 1.55 4 x 8
    11.4 1.75 4 x 9.2
    13 2 4 x 8
    13 2 4 x 8
    13 2 4 x 8
    13 2 4 x 8
    13 2 4 x 18.7
    14.4 2.25 4 x 11
    15.8 2.5 4 x 8
    15.8 2.5 4 x 8
    15.8 2.5 4 x 8
    17.2 2.75 4 x 25
    18.6 3 4 x 8
    18.6 3 4 x 8
    18.6 3 4 x 8
    18.6 3 4 x 24.7
    24 4 4 x 8