Commercial | Residential | Multifamily | Wall
A proven solution for wet environments
Ideal for use in attics, foundations, and crawl spaces, STYROFOAM™ Brand Square Edge Insulation is an extruded polystyrene foam (XPS) insulation that resists water pickup – a characteristic that allows it to keep high R-value.
Featured Resources
Commercial Wall² System - Inverted Wall Installation Bulletin
Commercial Wall² System Tyvek® CommercialWrap® UNDER Exterior Continuous Insulation – Installation Bulletin
Commercial Wall² System – Tyvek® CommercialWrap® or CommercialWrap® D Air and Water Barrier Installed OVER Exterior Insulation Installation Bulletin
Styrofoam™ Brand Square Edge
Styrofoam™ Brand Square Edge 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 Square Edge 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.
Features & benefits
| Bonds dry, treated, damp and frozen surfaces |
|
| Excellent adhesion |
|
Physical Properties
| Method | Unit | Value | |
|---|---|---|---|
| Thermal Resistance per inch @ 75°F mean temp. @ 40°F mean temp. @ 25°F mean temp.<sup>1</sup> | - | - | 5.6 |
| Compressive Strength<sup>2</sup> | ASTM D1621 | psi, min. | 25 |
| Water Absorption<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> | - | °F | 165 |
| Coefficient of Linear Thermal Expansion<sup></sup> | ASTM D696 | in/in•°F | 3.5 x 10-5 |
| Flexural Strength<sup></sup> | ASTM C203 | psi, min. | 50 |
Available Sizes
| R-Value | Thickness (in.) | Board Size (ft.) | Edge Treatment |
|---|---|---|---|
| 3.8 | 0.75 | 2 x 8 | Butt edge |
| 3.8 | 0.75 | 4 x 8 | Butt edge |
| 5 | 1 | 2 x 8 | Butt edge |
| 5 | 1 | 4 x 8 | Butt edge |
| 7.5 | 1.5 | 2 x 8 | Butt edge |
| 7.54 | 1.5 | 4 x 8 | Butt edge |
| 10 | 2 | 2 x 8 | Butt edge |
| 10 | 2 | 3.5 x 8 | Butt edge |
| 10 | 2 | 4 x 8 | Butt edge |
| 12.5 | 2.5 | 2 x 8 | Butt edge |
| 12.5 | 2.5 | 4 x 8 | Butt edge |
| 15 | 3 | 2 x 8 | Butt edge |
| 15 | 3 | 4 x 8 | Butt edge |
| 20 | 4 | 2 x 8 | Butt edge |
| 20 | 4 | 4 x 8 | Butt edge |
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