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Plywood vs. OSB by Paul Fisette OSB performs as well as or better than plywood in most applications — if you keep it dry The issue for most builders who choose between plywood and OSB is durability. OSB looks like a bunch of wood chips glued together (that's what it is). Its detractors are quick to say that OSB falls apart. This opinion has a familiar ring — plywood suffered the same criticism not too long ago. Delamination of early plywood sheathings gave plywood a bad name. Many "old-timers" swore by solid board sheathing until the day they hung up their aprons. But not many builders today share that view of plywood. Similarities of OSB and Plywood The model