Waterproofing is non negotiable; put money into a reputable membrane machine, excellent slopes, continual sealing

https://www.mediafire.com/file/zlqm9047ym5ljfn/pdf-84840-26163.pdf/file

Waterproofing is non negotiable; invest in a good membrane device, real slopes, steady sealing, and experiment for leaks formerly tub or shower setting up.