MARIE ARNAUD, HEAD OF THE DESIGN OFFICE
In most cases, depending on the dimensions of the bathrooms, I recommend full waterproofing. I then know it's 100% secure. This method is made easy with Lazer Natosec under tile waterproofing products.
Solutions : For a shower floor matching your dimensions and for the total waterproofing of your space. Natosec shower with Rotaflux siphon.