Solid wood floors are one solid piece of wood and are generally 3/4" thick. Mohawk Solid Hardwood Floors are produced from the finest domestic and exotic hardwoods including red & white oak, American cherry, hickory, maple, and Brazilian cherry, and are available in several widths. Because solid hardwood floors are more susceptible to humidity and temperature changes than engineered wood floors they should only be installed above grade over approved wooden subfloors and must be nailed or stapled down. Solid wood floors can generally be recoated and refinished several times.