When comparing Oriented Strand Board (OSB) and plywood for shelving, plywood is generally considered much better due to its superior structural rigidity, smoother surface finish, aesthetic appeal, and resistance to sagging under heavy loads. While OSB is cheaper and strong enough for rough utility shelving in dry environments, it tends to swell if exposed to moisture, looks unfinished, and flexes more easily over longer spans. Plywood provides a much cleaner, more durable, and reliable material for building custom home shelves.
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