That's not a massive surprise but you have got a job on your hands now! It's one reason that artisan hand made showers worry me, if it goes wrong it can go very wrong.
Yep. The main shower tray bit appears to be solid (although I can’t see the framing, it doesn’t feel rotten) but I’m tempted to rip it out and start again. The floor needs redoing as well anyway!
That's not a massive surprise but you have got a job on your hands now! It's one reason that artisan hand made showers worry me, if it goes wrong it can go very wrong.