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The Type 4 extruded polystyrene foam insulation helps protect foundation damp-proofing and waterproofing, especially during backfilling and provides a secondary barrier against groundwater leakage.
STYROFOAM™ Brand SM Insulation also provides energy-efficient performance in many other types of commercial and residential applications, including attics and ceilings.
Building Code Compliance
CAN/ULC S701 Type 4, CCMC 04888-L
| Board Thickness(1), in (mm) | R-Value(2) (RSI) | Board Size, ft (mm) | Edge Treatment | Min Compressive Strength(3), psi (kPa) |
| 1.0 (25) Stock | 5.0 (0.88) | 2 x 8 (600 x 2400) | Butt Edge/Shiplap | 30 (210) |
| 1.5 (38) Stock | 7.5 (1.32) | 2 x 8 (600 x 2400) | Butt Edge/Shiplap | 30 (210) |
| 2.0 (50) Stock | 10.0 (1.76) | 2 x 8 (600 x 2400) | Butt Edge/Shiplap | 30 (210) |
| 3.0 (75) Special Order | 15 (2.64) | 2 x 8 (600 x 2400) | Butt Edge/Shiplap | 30 (210) |
| 4.0 (102) Special Order | 20 (3.52) | 2 x 8 (600 x 2400) | Butt Edge/Shiplap | 30 (210) |
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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 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 or at yield, whichever occurs first. |
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STYROFOAM™ SM Insulation Extruded Polystyrene is especially suited for Foundations Slabs Crawl Spaces Interior Basement In-Ground Insulation Applications
