Wood in general is a “living” material and can change dimensions based on temperature, humidity, and manufacturing techniques. Plywood from a particular mill may vary between batches, and even the sheets within a bundle of plywood can vary from the top to the bottom and from day-to-day because of environmental changes. It can even vary within an individual sheet, a sheet in the middle of a stack will generally gain and lose moisture in the edges but not on the faces. For projects where pieces need to fit together accurately for aesthetics and/or strength this can be a problem.
Should we give up on plywood?
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