Dow Roofing Systems – STYROFOAM™ Brand HIGHLOAD 100 Insulation

Available in United States and Canada

STYROFOAM™ Brand HIGHLOAD 100 Insulation has a minimum compressive strength of 100 psi (690 kPa). The Type V 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 V. Meets IBC/IRC requirements for foam plastic insulation. Meets CAN/ULC S701 Type 4. See ESR-2142, BOCA-ES RR 21-02. UL Classified, see Classification Certificate D369.

STYROFOAM™ Brand HIGHLOAD 100 Insulation CAD Details

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U.S. Commercial

STYROFOAM™ Brand HIGHLOAD 100 Insulation

With a minimum compressive strength of 100 psi, STYROFOAM™ Brand HIGHLOAD 100 Insulation is designed for high-load applications where long-term strength and thermal performance are required.

Related Information

STYROFOAM™ HIGHLOAD 40, 60 and 100 Extruded Polystyrene Insulation Product Information (143KB 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

Square Edge

100

⁽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 HIGHLOAD 40, 60 and 100 Insulation products) or at yield, whichever occurs first. Since STYROFOAM™ Brand Extruded Polystyrene Foam 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.

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

Canada Commercial

STYROFOAM™ Brand HIGHLOAD 100 Insulation

With a minimum compressive strength of 100 psi (690 kPa), STYROFOAM™ Brand HIGHLOAD 100 Insulation is designed for high-load applications where long-term strength and thermal performance are required.

Related Information:

STYROFOAM™ HIGHLOAD 40, 60 and 100 Extruded Polystyrene Insulation Product Information (143KB PDF)
STYROFOAM™ Brand HIGHLOAD 40, 60 and 100 Extruded Polystyrene Insulation Product Information Sheet (French) (527KB PDF)
Tech Solutions 515.0 Achieving Canadian Class A Roof Assemblies Using STYROFOAM™ Brand Insulation With Single-Ply Membranes (164KB PDF)

Nominal Board Thickness⁽¹⁾, in (mm)

R-Value⁽²⁾ (RSI)

Board Size, ft (mm)

Edge Treatment

Min Compressive Strength⁽³⁾, psi (kPa)

2.0 (50)

10.0 (1.76)

2 x 8 (600 x 2400)

Butt Edge

100 (690)

⁽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 Foam 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.