Yes. To utilize the advantages of wet rooms, it’s helpful to tile the room fully. Specific tiles like marble and granite are known to maintain friction even if they’re exposed to water for prolonged periods. Thus, it makes your wet room safe from accidental slippage. However, the said materials are expensive, which may not be for everybody, especially for those who are under a tight budget. So the answer for you is to apply a waterproof solution to flooring and walls that should always maintain friction and be safe.