COREtec Pro Plus Enhanced floors can be installed in wet areas and will never swell when exposed to water. All COREtec floors are dimensionally stable, and will not expand or contract due to temperature or humidity under normal conditions. Plus, COREtec never needs expansion strips in large rooms. Each COREtec Pro Plus Enhanced plank or tile has an attached cork underlayment for a quieter, warmer floor that is naturally resistant to mold and mildew that can cause odors.