Here is a little tip from our consultant builder that can be used on any house with a tiled in shower.
IF the shower outlet behind the tiles ever leaked the water would fill the stud wall first before there was any sign of the leak on the outside.
So to act as an early warning device, simply set a piece of plastic tube around the shower outlet in the wall, using silicone to secure it against the base of the shower outlet.
Carefully tile around the pipe, then trim it back close to the tiles, connect the shower pipework to the outlet (a threaded joint that can spring a leak, hence the cunning trick) and if there ever is a leak, you will see it as a small drip from the end of this tube, which is trimmed back after tiling so that it is behind the finishing plate for the shower outlet.
