Planning on fully tiling my ensuite it currently only has tiling in shower. I intend chiselling these off and re tiling all the walls and floor with tiles.

Q1 should I treat the plaster board walls after I have chiselled old tiles off before I stick new tiles on with waterproof cement.

Q2 can I lay tiles directly onto floor with waterproof cement, which is smooth chipboard panels

Q3 should I lay floor tiles before wall tiles (if so how do you lift floor tiles if you need to without damaging wall tiles.

Anything else I need to consider? thanks

Re-plastering the walls after you have chiselled off the tiles is always gonna be on the cards.

Wall tiles first, better to chisel off wall tiles when the old floor is down.

There's no need to remove them - unless things are really tight, just tile over the existing tiles.

Seriously - tiles are one of the best base surfaces to tile on. You only need to take them off if you can't have the extra depth.

You can't lay floor tiles onto chipboard - it's not firm enough & they will crack. First you need to make sure the chipboard is firmly down - that means screwing it rather than nails - just make sure you don't screw through a pipe. Then you need to put at least 12mm hardwood ply on top and screw it into the chipboard at 6" centers - that means a screw every 6 inches across the entire floor. Then you can tile on top.

Doesn't really matter which way around - generally I'd do the walls first, then I'm not working on my nice new floor.

You might want to consider electric under floor heating whilst you're at it.....

...and think carefully about how you lay your tiles out before you start on the walls or the floor.

have you tiled anything before?

That's a good point - try dry laying them first.

Avoid having to cut thin slithers off the edge of a tile, always better to shift them if you can & get the cut more central.

Generally start from the opposite corner to the door - it's the first one you see so has to be right.

For walls, I start with a batton on the wall 1 tile up to get it level and work up from there, then do the bottom row last.

I would do mostly what the above says.
Start with a battern 1st about 3/4 of a tile high(not a full tile just incase the floor is slightly out), tile all the walls then remove the battern after all dried.
I would the leave the bottom row and tile the floor next, after these have set and dried i would then cut the bottom row in, i do this just in case the floor in slightly out and you can cut each one to size rather then a full tile.
I would also only use 6mm-8mm ply as base.
You may also need to trim the door so it opens!
Mark out you walls so you have about half a tile each end.
Also mark out tiles in height so you are not left with a small cut at top.

I would do mostly what the above says.
Start with a battern 1st about 3/4 of a tile high(not a full tile just incase the floor is slightly out), tile all the walls then remove the battern after all dried.
I would the leave the bottom row and tile the floor next, after these have set and dried i would then cut the bottom row in, i do this just in case the floor in slightly out and you can cut each one to size rather then a full tile.
I would also only use 6mm-8mm ply as base.
You may also need to trim the door so it opens!
Mark out you walls so you have about half a tile each end.
Also mark out tiles in height so you are not left with a small cut at top.

Ive done a bit of wall tiling before without any problems but not done floors before.

Can't tile over existing tiles as they don't cover all the walls so would have problems

Should the floor tiles actually go under the wall tiles?
The chipboard floor panels seem pretty solid and level to me the floor only measures 165cm x 165cm so not sure I need to put another layer down but might put some more screws in?
What thickness floor tiles do you recommend?

Yes i would have the floor tiles go under wall ones.
I would still put some sort of ply down even if you can only get 4mm over chipboard.
Most floor tile are similar in thickness unless you go for granite/ mable or natural stone etc..

Can't tile over existing tiles as they don't cover all the walls so would have problems


if you get some cheap tiles to use as packers (ie 1 to 4 ratio or something so that there is a tile, or even a quarter of a tile in each corner with four new tiles sitting over the top, if you see what i mean) you could still tile over existing. may not make sense - only you know the room

Unless there are only a few tiles on, then that's the kind of thing I'd look to do.

Getting tiles off is a pain, but if they were put on using good adhesive onto a plasterboard wall, they can be an absolute *******.

I'd always go for tiling over tiles.

As for the floor question - it's up to you mate - if the room is fairly square (not shape, but straight walls and the corners are 90 degrees), then I would do all the wall then the floor. If the walls are out, then it's wasier to hide by doing the floor first, then the bottom row of the wall. It just means more tile cutting.