Re: Salvaging old wet bed tile
The lath being individual slats of wood are nailed to the wall framing and the plaster base coat is applied so that it oozes between the slats ( keyed). The top coat of plaster apllied over top of this .... the adeasive and your tiles attached to that. Unfortunately vibration from a saw can cause enough vibration to loosen the the plaster or break away from the lath.
So unless you cut the the studs to try and remove the whole section out as one piece you're going to be hard pressed to remove them without some cracks happening. If the back splash butts to an adjoining wall at a corner this makes it more difficult.
If you happen to sucessfully remove the section lay it down on a sheet of plywood for example...... to carry it ..... otherwise it will probably snap in half when trying to carry it.
"" an ounce of perception -- a pound of obscure "