I like stacked for a nice clean look you do realize all the wterproofing will need to be redone and IMO the tub needs to beremoved the waterproofing done like anew install that might also mean new cement board instead of drywall with the proper waterproofing Are you still going to have this be a shower ? I would aslo be looking at changing the faucet and shower head since you are going this far.

thank you , I appreciate your comments.

Stacked sounds good for a cleaner look, true .

My main interrogation here was about the cut and measurement then, with big tiles like 24" .

So you d have a pile of 24" from the outter side and a 8" cut in the corner ?

For the main wall, start with a full 24" centered and 2x 17.5 " in corners ?

yes, waterproofing will be done with schluter kerdi, this is the main reason I am doing it, waterproofing is bad.

Tub, didnt think really about it, because it s old ?

Faucets, I guess I cant really change it without changing the valve and that s a whole different game .

every wall is start at the center

and work out. Start on the back wall first, as you don't want to look into the corners

(too much grout exposed) I would space them as close together as possible, less grout lines looks better (My opinion) Lots of though and measuring. Lay it all out... you don't want slivers of tile andthe top or bottom. expensive tile, you don't want to waste.

Thanks @Debbi Washburn , I like the fold on corners technic .

I didnt really get what you'r saying about the sharp edges, is cutting in 3 pieces in order to have the same look and not mix sharp and smooth edges ? Makes sense I guess as it can shown even with the grout .

That is correct.

If the cuts are done well, you can't really tell with a rectified tile.

If you are doing the straight stack, you can also do the 24" centered and have the 17 1/2 on each side. For the side walls , have an 8" piece then the 24" tile. The were the closest pictures to illustrate that option

What is the pattern of the tile? Have you considered vertical?

Thanks those are great tips and examples :)

Here are the tiles , they say not rectified, looks like I am better with a staggered then to avoid contrast between sharp and smooth line ...

https://www.mytiletown.ca/tileCollections/details/venezia-white-8x24-rippled-ceramic-wall-tile .

I thought about vertical, actually I kind of like it too , it would have to be staggered then , not a fan of stacked vertical .

I may have an accent line 3" x12" in a blue tone ( cause my walls are blue ) , although I may just not do the accent, especially if vertical and also if I decide to paint my walls at some point :) .

thought I'd send an update on the final result ... thanks for taking the time to provide advice :)

Oh nooo , today I turned on the water for the first time after the contractors finished (24H ago) and water is leaking all over the spout tube ... and if I action the diverter it doesnt go to the head . Makes sense cause all the pressure is released though the leak .

- Of course I am asking the contractor to come first thing tomorrow to fix it But what are my options . I am not sure they can fix it properly now without leaving a non durable installation .

If it is behind the spout, it may be necessary to remove some of the new tiles :( .

Any advice on how to handle problem like this and make sure it is "correctly" addressed and not just quickly fixed ?

thank you

What is on the other side of the faucet wall? Can you go in through that side?? Shame on them for not testing the plumbing before doing the tile work!

Hopefully since it is just the spout , he can fix it without touching the tile - sounds like the spout wasn't attached properly