Steam Enhances PenetrationIf you mop your floor occasionally with water and dry it completely immediately afterwards, you may be able avoid most of the negative effects of water damage. Using a steam mop is a different story. The mop pushes steam through cracks and crevices to force dirt out, and the steam readily penetrates the joints between boards. You may not notice problems after the first few uses on a hardwood floor, but the effects are cumulative. On laminate floors, the effects are more immediate, because the fiberboard cores of the planks soak up water more readily than solid hardwood.