A modern walk-in shower is undoubtedly more and more often chosen solution for bathrooms. We are attracted primarily by a modern, minimalist, timeless look, but also ease of use, optical bathroom enlargement, the possibility of creating it in very small bathrooms and so on... However, when designing and installing a floor drain or a shower tray in the floor there are a lot of mistakes to be avoided. You need to know about them in order to avoid problems with your shower in the future. Below is a list of some of the most common mistakes.