Guys
Could you please give me some advice on tiling over tiles.
Got a bathroom approx 20 sq m. Original tiles 4" square on 3 stud walls and one solid wall, would probably bring the plaster board off as well when removing the old tiles. What prep is required on old tiles i.e. scratchiing up the surface, or priming, and what adhesive would you use? powder or mixed up ready in tub. Thanks, John

i would advise to take the old stuff off mate and start from new but its all money mate. i have never tiled over tile but some of the lads on here have been doing it for years so wait for more advise. good luck with your project

May I ask why you are replacing the tiles in the first place? If it is because the grout is going black, or tiles are coming off the wall, then all you will be doing is temporarily masking the problem and/or making it worse.

If you really want to tile on the tiles, you need to remove all grease/soap scum/hair/crap or anything thats on the tiles. I would then take a high grit piece of sandpaper to the tiles.

You also have to be careful of the weights. Imagine, all that weight on those walls. Do you have kids? I would hate for the wall to be overloaded and all those tiles fall off the walls and onto your kids having a bath. You cannot be sure of the condition of the substrate underneath.

Good luck, and post back with any questions.

If its about cost then yes u can overtile best stuff is a flexi powder

pull the old plasterboard off with the tiles easy way to take tiles off then re board no need to plaster very easy and cheap :Pete

If you want a job that will last the test of time do as pete says and take the tiles/plasterboard off.
Any new tiling can be fixed ontop of old tiles with an acrylic adhesive with the right preparation - however you do not know how well fixed these small tiles are and you will have to leave the new tiling for an extended period before grouting to allow the adhesive to dry.
Once you start taking a few off you will see how easy they drop off.
If the plasterboard is damaged replace to the studs with new - very cheap and a nice new flat surface for you to tile on.
If you are hoping to retile with a larger format tile they will only be as well fixed as the small one on at present and the extra weight will pull them off!
Have fun

Timeless John.

Originally Posted by timeless john

Have fun

lol!

I'm with Pete (pjc) and Timeless on this one. Far better to take old tiles off in a controlled manner than risk them falling off in an uncontrolled manner imo

Thanks for all your advice guys. I think the way forward is to remove the old tiles and plaster board if necessary.
Cheers,

John