OSB3 (meaning Oriented Strand Board) is the classification of the exterior/structural type of OSB. We do also sell OSB2 Interior General Purpose which is slightly cheaper.
OSB3 board is a strong, versatile board suitable for structural use in humid conditions and in keeping with current construction methods of working towards healthier homes, all OSB3 panel products have been manufactured using zero added formaldehyde. OSB is made using layered flakes of wood which are compressed and bonded together with wax and resin adhesive.
Conditioned to perform in humid environments, OSB3 is the alternative to plywood and is suitable for both interior and exterior structural applications such as roofing, flooring, wall sheathing and hoarding etc.