Copper pan - should it go under the shower bench?
Hi - mid-remodel and our builder put in the copper pan. it does not extend under the shower bench, but stops before the bench. The bench is made of wood. This will be a steam shower, about 5' long. Bench is opposite the wet wall but we will have a rain shower head on ceiling, so the bench will be splashed and of course when steaming, could become wet.
What's the best way /materials to waterproof the back wall and bench, or should the copper pan go all the way under the bench?