Styrofoam™ Brand Cavitymate™
Designed for use in wet cavity wall environments
DuPont™ Styrofoam™ Brand Cavitymate™ Extruded Polystyrene Insulation is a proven solution that’s conveniently sized to fit between wall ties.
Styrofoam™ Brand Cavitymate™
DuPont™ Styrofoam™ Brand Cavitymate™ Extruded Polystyrene Insulation is an XPS insulation board designed to fit between brick ties in cavity wall applications. 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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| Convenient size |
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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. R-value, min. | 5 |
| Compressive Strength<sup>2</sup> | D1621 | psi (kPa), min. | 15 (103) |
| Flexural Strength<sup></sup> | C203 | psi (kPa), min. | 40 (276) |
| Water Absorption<sup></sup> | C272, D2842 | % by volume, max. | 0.3 |
| Water Vapor Permeance<sup>3</sup> | E96 | perm (ng/Pa•s•m2 ), max. | 1.5 (90) |
| Coefficient of Linear Thermal Expansion<sup></sup> | D696 | in/in•°F (mm/m•°C) | 3.5 x 10-5 (6.3 x 10-2) |
| Maximum Use Temperature<sup></sup> | - | °F (°C) | 165 (73.8) |
1Values are consistent with the criteria of ASTM C578 and the requirements of the FTC R-value rule (16 CFR Part 460). R means resistance to heat flow. The higher the R-value, the greater the insulating power. Ask your seller for the fact sheet on R-value.
2Vertical compressive strength is measured at 10 percent deformation or at yield, whichever occurs first. Since Styrofoam™ Brand Extruded Polystyrene Foam Insulations are visco-elastic materials, adequate design safety factors should be used to prevent long-term creep and fatigue deformation. For static loads, 3:1 is suggested. For dynamic loads, 10:1 is suggested.
3Based on 1” (25 mm) thickness.
Technical resources
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