Because there is a long history of use, hardwood flooring materials are thoroughly rated for size, shape, moisture content, evenness, consistency of color, and pattern features. Ratings are provided by several long-standing independent organizations, most notably the National Oak Floor Manufacturers Association. This means that you can easily rate the relative quality of any wood flooring material that you purchase.
As a newer flooring product, bamboo is not currently rated in any official way to guarantee the quality, source, or consistency of the product. Because of this, you never know quite what you are getting when you purchase bamboo flooring. It is also harder to ensure that bamboo products are sourced in a socially and environmentally responsible way. The best approach is to work with a reputable dealer or manufacturer with a proven track record of sustainable practices or sources, and one known for selling high-quality products.
The length of the warranty is usually a good indication of the quality of bamboo flooring. Warranties for the material itself can range from 10 to 25 years, with 25-year warranties indicating a high-quality flooring. Most bamboo flooring products will also carry a warranty for the finish, which can range from 5 to 10 years.