Plywood is a type of wood that is constructed up of many layers or plies, with a timber or veneer worktop. These layers contribute to the object’s strength and stability, allowing it to be employed for a variety of applications ranging from roof decking to cabinet construction. However, each sheet of plywood, as with all wood, may absorb moisture, whether via direct touch or by air humidity. Whenever the wood hydrates, it expands before shrinking when it dries. This sort of elastic deformation would have little impact in certain areas beyond the requirement for an expansion joint to soak up some of the mobility, but in specialty products like closets or furniture with close tolerances, excessive expansion and contraction over time can result in warping of the finished project.