Tile install over composite shower wall?

[cm_smitty]

I was wondering if it is possible to lay tile directly on top of a composite shower wall. The shower surrounds a bath an is 3 wall pieces - one for each of the alcove walls. I am not exactly sure what the material is but the surface looks like that of glazed ceramic tile. Very smooth with a faux marble finish. Pictures attached though you cant really see the pattern in them. I was thinking since this composite is already waterproof, it might be a lot simple just to tile over it, rather than tear out the walls and re-hang. This is my home, not a project someone is paying me for and I am mostly concerned with it being waterproof, and look better than it does currently (I don't need to make the cover of any magazines here!). Saving money is not the concern either, I just like the simplicity of it and the lack of intrusion/time.
If this is something that is feasible - what type of tile and mortar/mastic/adhesive combination would work best?
Thanks,
Chris

[dhagin]

That may be waterproof, but it's not a dimensionally stable substrate for tiling over. Meaning, it will likely expand and contract at rates different from tile, causing grout, tile or both to fail.

Suggest you remove it and use at least a basic install method to build back up. Cheapest easiest of these is plastic sheeting behind backer board.

[Grizzly Gibbs]

Remove it. most of the time it's easy to remove. Cleaner then ripping down old tile which is a bonus right from the start. Topically I find it to be little blogs of caulk that hold the wall up. So once you get started it finishes up pretty quick. Half the mess if that. Would give you a good chance to raise that shower head up like 3' or so. Lol that would bonus #2

[nelsonkoehn]

I don't know if those faux marble surrounds are actually waterproof. The sheets themselves may not let moisture thru, but around here I find that they rely strictly upon the silicone in the corners to stop the water. Not a good idea, in my opinion.

[cm_smitty]

Thanks for the comments... I will skip it and leave as is for now. Will remove it later when we decide to actually tile it.