bathroom shower leaking
We had new tile put in our shower a few years ago. Now there is water damage to our outside walls on both sides of the shower where there is water leaking from somewhere and the only place we can think of is possibly the shower. We thought the tile contractor did a great job but as I have been reading I don't know what kind of board he used behind the tile. Can some expert please tell me the exact way to install the tile, what kind of board to use behind the tile, and anything else we don't know about which is just about everything.
And, is there a way to tell if it is coming through the tile, or behind the tile as a fault of the tile backing without tearing the tile out?
Thank you so much.