I'm currently planning 3 bathroom renovations. Two where the space is 1200*800 and the third is 1200*700.

I love the minimal look of this sonas bathroom panel with brushed nickel.

My question is will I end up with a soaked floor outside if I go for the type of flat shower tray and then the minimal shower panels like this? They do offer a flipper for the end but what would be the optimal length for the side panel and if I get one of those will it reduce most waterflow from leaking out? We're not doing a wetroom, the floor outside will be either poured concrete or tiles.