Solid, like it sounds, is milled from a single 3/4" thick piece of hardwood. Because of its thickness, a solid hardwood floor can be sanded and refinished over several generations of use. One of the characteristics of solid wood flooring is that it expands and contracts with changes in your home's relative humidity. Normally, installers compensate for this movement by leaving an expansion gap between the floor and the wall. Base molding or quarter round is traditionally used to hide the extra space.
Solid wood flooring is completely lumber. It is available in unfinished and pre-finished. Solid wood flooring is produced in: