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 Product Information (66KB PDF)
Crawlspaces – Installing STYROFOAM Square Edge, STYROFOAM SCOREBOARD™ or STYROFOAM Tongue & Groove Insulation
Exterior Basement Wall – Installing STYROFOAM™ PERIMATE™, Square Edge, SCOREBOARD™, Tongue & Groove or BLUECOR
Interior Basement Wall (Even Wall w/Drywall Finish) – Installing STYROFOAM™ Tongue & Groove, SCOREBOARD™ or Square Edge
Interior Basement Wall (Foam and Stud Wall Framing) – Installing STYROFOAM™ Square Edge, Tongue & Groove, SCOREBOARD™, Super TUFF-R™, or TUFF-R
Foam Over Studs – Installing STYROFOAM™ Residential Sheathing, Tongue & Groove, Square Edge, DURAMATE™ Plus, TUFF-R™, Super TUFF-R™ or THERMAX™ for use as a Water-Resistive Barrier
Installation Procedures for THERMAX™ or STYROFOAM™ Brand Rigid Insulation – Closed Crawl Space (414KB PDF)
STYROFOAM™ Extruded Polystyrene Foam Insulation – 50 Year Thermal Limited Warranty (206KB PDF)
STYROFOAM™ Extruded Polystyrene Foam Insulation – 30 Year Thermal Limited Warranty (202KB PDF)
STYROFOAM™ Extruded Polystyrene Foam Insulation – 15 Year Thermal Limited Warranty (201KB PDF)
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|
(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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