Styrofoam™ Brand Deckmate™ Plus
Cover all the bases on low-slope roofs
On low-slope roofs, DuPont™ Styrofoam™ Brand Deckmate™ Plus Extruded Polystyrene Insulation helps resist moisture and freeze-thaw impacts while eliminating the need for a thermal barrier.
Styrofoam™ Brand Deckmate™ Plus
A durable foam insulation board with shiplap edges, DuPont™ Styrofoam™ Brand Deckmate™ Plus Extruded Polystyrene Insulation 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 |
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| Closed-cell structure |
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| Direct-to-deck application |
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| Boosts energy performance |
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Physical Properties
| Method | Unit | Value | |
|---|---|---|---|
| Thermal Resistance per inch (25 mm) @ 75°F (24°C) mean temp.<sup>1</sup> | C518 | ft2 •h•°F/Btu (m2 •°C/W), R-value (RSI)(1) | 5.0, 0.87 |
| Compressive Strength<sup>2</sup> | D1621 | psi (kPa), min. | 25, 20 (140) |
| Flexural Strength<sup></sup> | C203 | psi (kPa), min. | 50, 43.5 (300) |
| Water Absorption<sup></sup> | C272, D2842 | % by volume, max. | 0.3, 0.7 |
| Water Vapor Permeance<sup>3</sup> | E96 | perm @ 1” thick perm @ 2” thick | 1.5 (90) |
| Dimensional Stability, max<sup>5</sup> | D2126, CAN/ULC S701 | % linear change, max. | 2 |
| Coefficient of Linear Thermal Expansion<sup></sup> | - | x105in/in °F (x102mm/m °C) | 3.5 x 10-5 (6.3 x 10-2) |
| Maximum Use Temperature<sup></sup> | - | Fdays | |
| Flame Spread<sup>4</sup> | E84 | Fdays | 15 |
| Smoke Developed<sup>4</sup> | E84 | Fdays | 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.
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