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Definitions and Types of OSB
OSB also known as Oriented Strand Board, is a multi-layered board consisting mainly of wood strands, oriented in specific directions, which are pressure-bonded and heat-bonded by a resin, the binder.
The thickness of this type of board is 6 to 25 mm.
It is used in timber construction as a bracing panel, in roofs and floors.
Four types of OSB are defined in the European standard EN 300:
- OSB1: general purpose, non-working panels and interior fit-out panels for dry use
- OSB2: panels for dry use
- OSB3: panels for use in wet conditions
- OSB4: high-stress panels for use in wet conditions