Walls and foundations



Legerclad is an insulation made of type-2 expanded polystyrene covered with a Typar air barrier. On top of its insulation value, Legerclad thus provides the protection of a barrier that prevents air infiltration while allowing humidity to escape from the wall cavity.

When installed in accordance with our guidelines, Legerclad used on exterior walls conforms to the standards contained in the National Building Code (NBC) and the Regulation respecting energy conservation in new buildings. Legerclad is available in several standard sizes: (4 ft. × 9 ft. and 4 ft. × 8 ft.) with a thickness of (1 in. [R-4.05], 1 1/2 in. [R-6.05], 2 in. [R-8.1] or 2 1/4 in. [R-9.1]).


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 4,6 min. (0,82 min.)
Compressive strength (min.) at 10% distortion lb/po2 ou psi (kPa) ASTM: D-1621 16 (110)
Bending strength (min.) lb/po2 ou psi (kPa) ASTM: C-203 35 (240)
Dimensional stability: % of linear change (max.) % % ASTM: D-2126 0,5
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 › 60
Air permeability L/s.m2 ASTM: CNB 0,0032
Water absorption (max.) % % ASTM: D-2842 4
Effective temperature range: › continuous › intermittent °F (°C) 167 (75) 180 (82,2)°F(°C)-
Flame spread rating ASTM: (CAN/ULC S102,2 M) FR ‹ 115
Smoke developed ASTM: (CAN/ULC S102,2 M) ‹ 430
Capillarity Nulle


  • 5901, chemin de service
    Transcanadienne N
    Pointe-Claire (Québec)
    Canada H9R 1B7
  • 514 694-2493


  • 1999 Forbes Street,
    Whitby (Ontario),
    Canada L1N 7V4
  • 905-728-0072