STYROFOAM™ Brand HIGHLOAD 40 Insulation has a minimum compressive strength of 40 psi (275 kPa). The Type VI extruded polystyrene foam insulation resists compressive creep and fatigue, delivering long-term compressive strength and thermal performance in high-load applications.
Building Code Compliance
Complies with ASTM C578 Type VI. Meets IBC/IRC requirements for foam plastic insulation. Meets CAN/ULC S701 Type 4. See ESR-2142, BOCA-ES RR 21-02. CCMC – Evaluation Listing #04888-L UL Classified, see Classification Certificate D369.
STYROFOAM™ Brand HIGHLOAD 40 Insulation CAD Details
U.S. Commercial
With a minimum compressive strength of 40 psi, STYROFOAM™ Brand HIGHLOAD 40 Insulation is designed for high-load applications where long-term strength and thermal performance are required.
Related Information
STYROFOAM™ HIGHLOAD 40, 60, 100 Extruded Polystyrene Insulation Product Information (143KB 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)
| Nominal Board Thickness(1), in | R-Value(2) | Board Size, ft | Edge Treatment | Min Compressive Strength(3), psi |
| 2.0 | 10.0 | 2 x 8 / 4 x 8 | Square Edge | 40 |
| 3.0 | 15.0 | 2 x 8 / 4 x 8 | Square Edge | 40 |
|
(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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07 20 00 Board Insulation
07 21 13 Board Insulation (Below Grade)
07 22 16 Roof Board Insulation (Protected Membrane Systems)
07 55 00 Protected Membrane Roofing Insulation
31 23 24 Perimeter and Below-Grade Insulation
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Canada Commercial
With a minimum compressive strength of 40 psi (275 kPa), STYROFOAM™ Brand HIGHLOAD 40 Insulation is designed for high-load applications where long-term strength and thermal performance are required.
Related Information
STYROFOAM™ HIGHLOAD 40, 60, 100 Extruded Polystyrene Insulation Product Information (143KB PDF)
STYROFOAM™ Brand HIGHLOAD 40, 60, 100 Extruded Polystyrene Insulation Product Information Sheet (French) (527KB PDF)
Tech Solution 515.0 Achieving Canadian Class A Roof Assemblies using STYROFOAM™ Brand Insulation with Single-Ply Membranes (164KB PDF)
| Board Thickness(1), in | R-Value(2) (RSI) | Board Size, ft | Edge Treatment | Min Compressive Strength(3), psi |
| 1.0 (25) | 5.0 (0.87) | 2 x 8 (600 x 2400) | Butt Edge | 40 (275) |
| 1.5 (38) | 7.5 (1.32) | 2 x 8 (600 x 2400) | Butt Edge | 40 (275) |
| 2.0 (50) | 10.0 (1.76) | 2 x 8 (600 x 2400) | Butt Edge | 40 (275) |
| 3.0 (75) | 15.0 (2.64) | 2 x 8 (600 x 2400) | Butt Edge | 40 (275) |
|
(1) Not all product sizes are available in all regions. (2) R means resistance to heat flow. The higher the R-value or RSI (R-Value Système Internationale), the greater the insulating power. R-values are expressed in ft2• h•°F/Btu. RSI values are expressed in m2 °C/W. R-value determined by ASTM C518. (3) Vertical compressive strength is measured at 10% deformation (5% for STYROFOAM™ Brand HIGHLOAD 40, 60 and 100 Insulation products) or at yield, whichever occurs first. Since STYROFOAM™ Brand Extruded Polystyrene 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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07 20 00 Board Insulation
07 21 13 Board Insulation (Below Grade)
07 22 16 Roof Board Insulation (Protected Membrane Systems)
07 55 00 Protected Membrane Roofing Insulation
31 23 24 Perimeter and Below-Grade Insulation
We're here to help. If you're not finding the information you need, please let us know.