Duramate™ Plus XPS Insulation

Commercial | Residential | Multifamily | Wall

Give new homes an edge over the elements

Designed for residential construction, this Styrofoam™ Brand extruded polystyrene (XPS) foam insulation provides a moisture-resistant barrier for new homes. It’s ideal for applications where the foam sheathing is fastened to frame walls.


Duramate™ XPS Insulation

Duramate™ Plus is a Styrofoam™ Brand extruded polystyrene (XPS) foam insulation, designed for residential home construction. It is DuPont's strongest XPS foam insulated sheathing, with proprietary extra-tough plastic on both sides.


Features & benefits

Feature Benefit
Durability; extra-strong film facers
  • Durability; extra-strong film facers
  • Reduces waste on site
  • Thermal efficiency
  • Reduces heat flow
  • Reduces energy costs long-term
  • Closed-cell foam core
  • Resists moisture in all forms, including water vapor
  • Printed stud finders
  • Enables fast, accurate installation
  • Easy to handle

    Physical properties

    Method Unit Value
    Thermal Resistance at nominal 1/2” @ 75°F mean temp.1 ASTM C518 ft2 •h•°F/Btu, min., R-value 3.0
    Compressive Strength2 ASTM D1621 psi, min. 15
    Water Absorption ASTM C272 % by volume, max. 0.3
    Dimensional Stability3 ASTM D2126 % linear change, max. 2.0

    1 R-values are consistent with criteria of ASTM C578 and requirements of FTC R-value rule (16 CFR Part 460).

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

    3 Based on 1” thickness.


    Available sizes


    Thickness1 (in.) R-Value Board Size (in.) Edge Treatment
    Styrofoam™ Brand Duramate™ Plus XPS Insulation 0.5 3.0 48 x 96 Square Edge
    0.5 3.0 48 x 108 Square Edge