Sub floors are an issue for these floors, solid wood without a proprietary floor fitting system such as metal clips, must in floor fitters opinion be nailed down due to the movement that naturally occurs. The solid wood floors will expand and shrink so is best to be fitted by professionals. Wooden flooring is used both for home and business use, it is easy to clean and doesn't stain. Another type of wooden flooring is clip system flooring that are fitted by a metal clip system that holds the rows together, this allows the solid wooden flooring to be laid as a floating floor over concrete subfloors.If your thinking about a new wood floor, it's nice to know that wood floors are always the right choice, no matter what particular trend is currently fashionable in the world of interior design. After all, wood floors are designed by Mother Nature herself, making them timelessly beautiful.
 

Flooring on Wikipedia