Engineered wood is real wood, but instead of one solid piece it consists of three to 10 thin layers of wood, called plies, that are assembled and glued in a cross-ply construction. The top layer of wood can range from .5 mm to 3 mm thick. Overall board thickness ranges from 1/4" to 3/4". Due to its multi-ply structure, engineered wood is much more stable than solid wood and is less susceptible to shrinking and expanding with changes in temperatures and humidity.
Keep In Mind:
Engineered wood can be installed directly over concrete and can also be installed below ground level.
Engineered wood with a top layer thinner than 1/10" cannot be refinished; however, it can be recoated to renew the surface of the floor.