HI, New to forum... blah blah blah... be nice to me please. I searched but did not find a really good answer, My Wife and I bought a 1939 cape-cod style house that has wiring probably done in the late 50's and obviously plaster lath almost everywhere. We tore out the tile off of the walls in the bathroom, and we took the floor down to the original wood (going to do tile). But as for the walls, there are 4 holes in the plaster (which looks like the gypsum board plaster stuff, not the lath, and we would like to do tile surrounding the tub. Now the Question: can we tile over the plaster, or would I be better off taking it all down, and putting green drywall up and cement board up in the place around the tub? I know the advantages/ disadvantages of doing this sound and cost wise, just looking for the most reasonable answer.