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One radical difference between solid and engineered hardwood flooring comes when making the decisionon whether to refinish your floor. Solid wood flooring lends itself to refinishing more easily, as the planks are made of a singular sturdy piece of lumber. On the other hand, engineered hardwood flooring has several plies of wood, so sanding is not as necessary. In fact, sanding usually takes 1/32 inch off the top of the floor, so an engineered floor with a 2mm top hardwood layer can really only be sanded once or twice in its lifetime.
If you have a damaged area of an engineered hardwood floor, it's best to have that area removed and replaced by flooring professionals rather than attempting to refinish the entire floor.