OSB, full name is Oriented Strand Board, is an engineered wood particle board formed by layering strands (flakes) of wooden 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″), lying unevenly across each other.
Four types of OSB
OSB-1- is intended for use in conditions of low humidity (furniture, paneling, and packaging).
OSB-2- used in the manufacture of load-bearing structures in dry conditions.
OSB-3- is used in the manufacture of load-bearing structures in wet conditions.
OSB-4- heavy-duty load-bearing boards for use in humid conditions
Advantages
1) Tight construction and high strength
2) Minimum twisting, delamination or warping
3) No rotten or decay, strong against corrosion and fire
4) Water proof, consistent when exposed in the natural or wet environment
5) Low formaldehyde emission
6) Good nailing strength, easy to be sawn, nailed, drilled, grooved, planed, filed or polished
7) Good heat and sound resistant, easy to be coated.
8) Note the OSB 3 is for use on flat roof situations, a far better product than standard chipboard or particleboard.
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