As it is an expensive purchase, you will want the best carpet for basement floors. You will need to use a olefin carpet. Because basements tend to be more damp than other areas of your home, it is susceptible to mold and mildew issues. These are a health hazard, as well as an odor issue. Using an olefin carpet will allow you to clean the carpet with strong detergents and cleaners, even bleach, if it becomes necessary. The cleaners will not harm the carpet because it is made of entirely synthetic fibers.