The pre-finished wood flooring comes in ¾-inch thick planks of random lengths to prevent distracting seam lines across your floor. It is generally nailed directly to the sub-floor although some products are available with floating installation. The tough finish is easy to clean and maintain and they can be refinished as they age. Pre-finished floors are installed much more quickly and easily than unfinished flooring and they can be modified to your tastes with various borders and designs. It can be used the same day it is are installed and there is very little dust, mess or fumes with the installation.