Walls and foundations

Legerboard

Legerboard

Legerboard is a composite panel made up of type-2 expanded polystyrene insulation and a (7/16 in.) oriented strand board (OSB). The expanded polystyrene (EPS) insulation acts as a protection for the structural wall, whereas the OSB sheet reinforces the wall against diagonal distortion. The OSB sheet is available either with or without perforations in two sizes: (4 ft. × 9 ft. and 4 ft. × 8 ft.)

Legerboard R-4 panels are designed to break the thermal bridge between the structure and the exterior finish, in compliance with the National Building Code. Their solidity facilitates the installation of exterior finishings.

PHYSICAL PROPERTIES IMPERIAL METRIC TEST LEGERBOARD
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 R4 1 5/16″
Compressive strength (min.) at 10% distortion lb/po2 ou psi (kPa) ASTM: D-1621 16 (110)
Water vapor permeability (max.) (ng/Pa.s.m2) ASTM: E-96 200 (seulement pour l’isolant)
Water absorption (max.) % % ASTM: D-2842 4

Montréal

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

Toronto

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