Oriented strand board

Oriented strand board (OSB), also known as Sterling board and by the proprietary eponym Aspenite, is an engineered wood particle board formed by layering strands (flakes) of wood in specific orientations. In appearance, it may have a rough and variegated surface with the individual strips of around 2.5 x 15 cm / 1 x 6 inch, lying unevenly across each other.

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