Specifically, we suggest: Tile: To clean, simply wipe it down! Don't let your guard down. Sometimes it's slick. Concrete: Ideal for those who wish to install their sauna in an unfinished basement or garage. You can lay down duckboard flooring or just wear sandals if you're worried about your feet getting cold. For this time of flooring, please make sure the ground is level for the best results! Vinyl: Quick assembly, simple cleanup, and a wide range of stylish options. Choose something that can withstand moisture if at all possible.