According to Melissa Porter, engineered wood flooring consists of layered tiers of real wood pressed together during the manufacturing process. Although natural wood gets used for the top and bottom layers, the inner layers are made of plywood or fiberboard. The small amount of wood used in engineered hardwood flooring (on the top and bottom only) makes this type of flooring more affordable than solid wood. Since humidity is the enemy of hardwood flooring, one of the key advantages of an engineered hardwood is the high stability and resistance to expansion and contraction in a damp and sticky atmosphere. Therefore, engineered floors can be attached to concrete subfloors in the basements, as they can easily withstand moisture as well as heat. Engineered timbers prices are shown in this link: Resources: