Legerlite SM
Legerlite SM expanded polystyrene is a type-1 insulation with a minimal thermal resistance of R-3.7 per inch of thickness. Legerlite SM conforms to National Building Code standards and can be used for interior or exterior walls and foundations.
Its low price, versatility and R value-price ratio make Legerlite SM an all-purpose insulation option.
| PHYSICAL PROPERTIES | IMPERIAL | METRIC | TEST | LEGERLITE SM |
| Thermal resistance: r-value at 75ºF (24ºc) for 1 in (25 mm) thickness | (hre.pi2 .°F) / BTU | (m2 °C W) / W | ASTM: C-518 C-177 | 3,7 min. (0,70 min.) |
| Compressive strength (min.) at 10% distortion | lb/po2 ou psi | (kPa) | ASTM: D-1621 | 10,2 (70) |
| Bending strength (min.) | lb/po2 ou psi | (kPa) | ASTM: C-203 | 25 (170) |
| Dimensional stability: % of linear change (max.) | % | % | ASTM: D-2126 | 1,5 |
| Coefficient of thermal expansion (max.) | po/po/°F | (mm/mm/°C) | ASTM: D-696 |
3,5×10- 5(6×10-5c-1) |
| Water vapor permeability (max.) | – | (ng/Pa.s.m2) | ASTM: E-96 | 5,25 (300) |
| Water absorption (max.) | % | % | ASTM: D-2842 | 6 |
| Effective temperature range: › continuous › intermittent | °F | °C | – | 167 (75) 180 (82,2) |
| Flame spread rating | – | – | ASTM: (CAN/ULC S102,2 M) FR | ‹ 115 |
| Smoke developed | – | – | ASTM: (CAN/ULC S102,2 M) | ‹ 430 |
| Capillarity | – | – | – | Nulle |