I would find a specialist in wetroom/Roman bath/swimming pool type installs and suggest to the plumber they pay for a consultation before you do.
It's important not to throw the book at any tradesman, I know I'll bend over backwards for my customers if they ask but will only do the minimum required if thats what they demand.
The mix of builder tiler and plumber here is a recipe for problems if you start laying down the law.
Unless your contract is with just one of them, then let rip
It's important not to throw the book at any tradesman, I know I'll bend over backwards for my customers if they ask but will only do the minimum required if thats what they demand.
The mix of builder tiler and plumber here is a recipe for problems if you start laying down the law.
Unless your contract is with just one of them, then let rip