STYROFOAM™ Brand Square Edge Insulation Extruded Polystyrene is a Type IV product with square edges on four sides to help ensure energy efficiency and minimize on-site cutting and waste. It offers superior water resistance, long-term thermal performance and high compressive strength in a wide range of residential and commercial construction applications.
Building Code Compliance
Complies with ASTM C578 Type IV. Meets IBC/IRC requirements for foam plastic insulation. See ESR-2142, BOCA-ES RR 21-02. UL Classified, see Classification Certificate D369. Calif. Std. Reg. # CA T064. Florida Building Code FL 3835.
STYROFOAM™ Brand Square Edge Insulation CAD Details
Related Information
STYROFOAM™ Brand Square Edge Insulation Product Information (66KB PDF)
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STYROFOAM™ Extruded Polystyrene Foam Insulation – 50 Year Thermal Limited Warranty (206KB PDF)
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STYROFOAM™ Brand Square Edge Insulation has square edges to help ensure energy efficiency and minimize on-site cutting and waste in a wide range of residential and commercial construction applications.
| Nominal Board Thickness(1), in | R-Value(2) | Board Size, ft | Edge Treatment | Min Compressive Strength(3), psi |
| .75 | 3.8 | 2 x 8 / 4 x 8 | Square Edge | 25 |
| 1.0 | 5.0 | 2 x 8 / 4 x 8 | Square Edge | 25 |
| 1.5 | 7.5 | 2 x 8 / 4 x 8 | Square Edge | 25 |
| 2.0 | 10.0 | 2 x 8 / 4 x 8 | Square Edge | 25 |
| 2.5 | 12.5 | 2 x 8 / 4 x 8 | Square Edge | 25 |
| 3.0 | 15 | 2 x 8 / 4 x 8 | Square Edge | 25 |
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(1) Not all product sizes are available in all regions. (2) R means resistance to heat flow. The higher the R-value, the greater the insulating power. R-values are expressed in ft2• h•°F/Btu. R-value determined by ASTM C518. (3) Vertical compressive strength is measured at 10% deformation (5% for STYROFOAM™ Brand PLAZAMATE™ Insulation and for STYROFOAM™ Brand HIGHLOAD 40, 60 and 100 Insulation products) or at yield, whichever occurs first. Since STYROFOAM™ Brand Extruded Polystyrene and Dow polyisocyanurate insulation products are visco-elastic materials, adequate design safety factors should be used to prevent long-term creep. For static loads, 3:1 is suggested. For dynamic loads, 5:1 is suggested. |
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