No matter what the source of the material, the wood is carefully recovered to minimize environmental distress. All nails and other metal objects are removed by hand, and the wood then is meticulously milled to yield the most usable flooring material.
The NWFA is a not-for-profit trade organization of more than 3,600 wood flooring professionals working worldwide to educate consumers, architects, designers, and builders in the uses and benefits of wood flooring. The NWFA can be contacted at 800-422-4556 (USA & Canada), or 636-519-9663 (local and international).
SOURCE National Wood Flooring Association