My daughter was taking a shower and part of the tile wall fell down.
Underneath there is drywall and it is wet and rotted. The studs are
also rotted.
I plan to rip it all out replace the rotted studs, cover with moisture
barrier, cement board and retile.
Is there a good description / tutorial on replacing studs? I wonder
why builders are allowed to construct bathrooms like this, you would
think it should be against the building code.

Thanks