Made for almost all types of commercial or residential foundation walls, Styrofoam™ Brand SM Extruded Polystyrene Foam Insulation protects against the impacts of freeze-thaw cycles and provides a secondary barrier against groundwater leakage.
Styrofoam™ Brand SM Extruded Polystyrene Foam Insulation is a versatile, multipurpose extruded polystyrene board that fits the needs of the commercial and residential foundation and slab market. Styrofoam™ Brand SM Insulation’s closed-cell structure resists water absorption, enabling it to retain a high R-value (RSI)** over time – a necessary property in below-grade residential foundation applications. It helps to protect foundation dampproofing and waterproofing, especially during backfilling. It also provides a secondary barrier against groundwater leakage. With Styrofoam™ Brand SM Insulation, the freeze-thaw cycling of the foundation wall is minimized, reducing the possibility of cracking. And a warmer foundation wall reduces the potential for condensation and adds to the thermal mass of the building.
** R means resistance to heat flow. The higher the R-value or RSI, the greater the insulating power.
|Easy to use||
|Thermal Resistance per inch (R-value), @ 75°F mean temp.1||ASTM C518||ft2 •h•°F/Btu, R-value, min.||5.0 (.88)|
|Compressive Strength2||ASTM D1621||psi (kPa), min.||30 (207)|
|Water Absorption||ASTM C272||% by volume, max.||0.3|
|ASTM D2842||% by volume, max.||0.7|
|Water Vapor Permeance||ASTM E96||perm (ng/Pa•s•m2), max||1.5 (90)|
|Maximum Use Temperature3||ASTM D696||°F (°C)||165 (74)|
|Coefficient of Linear Thermal Expansion||ASTM D696||in/in•°F (mm/m•°C)||3.5 x 10-5 (6.3 x 10-2)|
1 R means resistance to heat flow. The higher the R-value, the greater the insulating power.
2 Vertical compressive strength is measured at 10 percent deformation or at yield, whichever occurs first. Since Styrofoam™ Extruded Polystyrene Foam Insulations are visco-elastic materials, adequate design safety factors should be used to prevent long-term creep and fatigue deformation.
3 Based on 1” thickness.
4 This numerical flame spread rating is not intended to reflect hazards presented by this or any other material under actual fire conditions
|Thickness1 (in)||R-Value2||Board Size (in)||Edge Treatment|
|1.0||5.0||24 x 96||Butt Edge, Shiplap|
|1.5||7.5||24 x 96||Butt Edge, Shiplap|
|2.0**||10.0||24 x 96||Butt Edge, Shiplap|
|2.4||12.0||24 x 96||Shiplap|
|2.5||12.5||24 x 96||Shiplap|
|3.0||15.0||24 x 96||Butt Edge, Shiplap|
|4.0||20.0||24 x 96||Butt Edge, Shiplap|
|Thickness1 (mm)||R-Value2||Board Size (mm)||Edge Treatment|
|50||1.73||600 x 2400||Butt Edge, Shiplap|
|75||2.61||600 x 2400||Butt Edge, Shiplap|
1Not all product sizes are available in all regions. Additional product sizes are available by custom order. Consult your DuPont sales representative about other sizes and lead-time requirements.
2Aged R-value at 1” cured foam @ 75°F mean temperature. R-value expressed in ft2 •h•°F/Btu. R-value determined by ASTM C518 using the aging process in ASTM C1289 (90 days @ 140°F).