Antique wood floors include three varieties. True antique wood floors are that of the reclaimed variety, sourced from aged structures such as barns, homes, wooden ladders, etc. It can also be salvaged from riverbeds, driftwood, and fell timber. In some cases antique wood is classified as such as soon as 10 years after it is harvested, depending on aging factors such as insect infestation weather conditions. However, more typically it is classified as antique 40 to 200 years after harvest.
The second variety of antique hardwood flooring is artificially aged, using a variety of techniques, to include acid bathing, heat treatment, and custom glazing, finishing, staining, and distressing techniques. Timber can also be buried with certain worm and insect colonies, whereby mineralization and decay can occur especially on the outer surfaces of buried planks or veneers.