Styrofoam™ Brand Deckmate™ Plus FA

Commercial | Residential | Multifamily | Wall

Help low-slope roofs resist the elements

On low-slope roofs, durable DuPont™ Styrofoam™ Brand Deckmate™ Plus FA Insulation resists moisture and freeze-thaw impacts, eliminating the need for a thermal barrier.


Styrofoam™ Brand Deckmate™ Plus FA

This is an extruded polystyrene (XPS)foam insulation board with a planed surface and shiplap edges. With its direct-to-deck application, DuPont™ Styrofoam™ Brand Deckmate™ Plus FA is easy, fast and flexible to use. The Styrofoam™ Brand XPS product line gives you the proven thermal and moisture performance of the original XPS, plus the product options you need to design and build energy-efficient, resilient structures all the way to the top. It’s lightweight and easy to install, which makes the work go faster, and it’s readily available through our wide distributor network. When and where you need it, Styrofoam™ Brand is there.


Features & benefits

Lightweight and durable
  • Easy to handle
  • Reduces waste
  • Resists damage
  • Closed-cell structure
  • Excellent freeze-thaw resistance
  • Excellent insulating characteristics
  • High moisture resistance
  • Direct-to-deck application
  • Easy, fast, flexible use on site
  • Eliminates need for thermal barrier to keep costs down
  • Boosts energy performance
  • Cost-effective

    Physical Properties

      Method Unit Value
    Thermal Resistance per inch (25 mm) @ 75°F (24°C) mean temp.<sup>1</sup> C518 Fdays 5.0, 0.88
    Compressive Strength<sup>2</sup> D1621 Fdays 25 (170)
    Flexural Strength<sup></sup> C203 Fdays 50 (350)
    Water Absorption<sup></sup> C272, D2842 Fdays 0.3, 0.9
    Water Vapor Permeance<sup>3</sup> E96 Fdays 1.5 (90)
    Dimensional Stability, max<sup>5</sup> D2126, CAN/ULC S701 Fdays 2.0, 1.5
    Coefficient of Linear Thermal Expansion<sup></sup> - Fdays 3.5 x 10-5 (6.3 x 10-2)
    Maximum Use Temperature<sup></sup> - Fdays 165 (74)
    Flame Spread<sup>4</sup> E84 - 15
    Smoke Developed<sup>4</sup> E84 - 165

    1 R means resistance to heat flow. The higher the R-value, the greater the insulating power.

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

    3Based on 1” (25 mm) thickness.

    4These numerical flame spread and smoke developed ratings are not intended to reflect hazards presented by this or any other material under actual fire conditions.

    5Tested at 158°F/97% RH/7 days.


    Available Sizes

    Width Length
    24 96
    24 96