never use redguard. NOT UNLESS YOU APPLY IT CORRECTLY. typically 4 to 5 coats, mill gauge tests and 6" fiberglass at all seams. for the cost and time, just put on kerdi. IMO that looks terrible so far. So sorry for your customers.
Doesn’t look terrible at all, you’re being a hater for no good reason. Red guard is a tried and true method and the “old school way” which is still used to this day. A lot of us were taught and have been doing bathrooms from way before all the new waterproofing methods.
