Oriented strand board (OSB), also known as flakeboard, is a type of engineered lumber similar to particle board, formed by oil removing, drying, adding adhesives and then compressing layers of wood strands (flakes) in specific orientations.

1. OSB panels have no internal gaps or voids, and are water-resistant.

2. The finished product has properties similar to plywood, but is uniform and cheaper.

3. OSB has a greater load-bearing capacity than milled wood panels.