Ideal for use in attics, foundations, and crawl spaces, STYROFOAM™ Brand SM30 Insulation is an extruded polystyrene foam (XPS) insulation that resists water pickup – a characteristic that allows it to keep high R-value.
Styrofoam™ Brand SM30 Insulation* is an extruded polystyrene foam (XPS) insulation board that meets the needs of the commercial foundation and building floor slab market and can also be used for attics, foundations/slabs and crawl spaces in residential applications. With more than 60 years of proven performance in wet environments, the closed-cell structure of Styrofoam™ Brand SM30 Extruded Polystyrene Foam Insulation resists water pickup, enabling it to retain a high R-value** over time – a necessary property in wet, below-grade commercial foundation applications.
Bonds dry, treated, damp and frozen surfaces |
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Excellent adhesion |
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  | Method | Unit | Value |
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Thermal Resistance per inch @ 75°F mean temp. @ 40°F mean temp. @ 25°F mean temp.<sup>1</sup> | - (ASTM-2) | - | 5.6 |
Compressive Strength (PPSH-57)<sup>2</sup> | ASTM D1621 (ASTM-65) | psi, min. | 25 |
Water Absorption (PPSH-277)<sup></sup> | ASTM C272 | % by volume, max. | 0.3 |
Water Vapor Permeance<sup>3</sup> | ASTM E96 | perm, max | 1.5 |
Maximum Use Temperature<sup></sup> | - (ASTM-2) | °F | 165 |
Coefficient of Linear Thermal Expansion (PPSH-49)<sup></sup> | ASTM D696 (ASTM-89) | in/in•°F | 3.5 x 10-5 |
Flexural Strength (PPSH-118)<sup></sup> | ASTM C203 | psi, min. | 50 |