How would you tackle this?

[charlie1]

Lift them with SDS (1 hour (MAX)), Lay 2 bags slc (guestimate)... Go home and have your dinner, back out next morning and tile, grout up by 12 ish (guestimate), fit a nice transition strip and get your cash. Take the wife out for some lunch, then go home and sleep like a champion!

 

[Martino]

Charlie1 has written a 'how to do the job correctly' and now he feels.....EPIC! lol....

 

[gamma38]

I'm with everyone else, lift them, I don't see the point of ever going over tiles no matter how solid they feel.

 

[Ajax123]

I think you should leave them down but only cos that is what you want to hear.....

 

[Ian norris]

I would take them up and then you could redo that pipework with copper and hide it.

 

[widler]

Personally id tile over them. Are they quarry tiles?
The aint glazed anyhow. Why can't you clean them, slurry them and tile?
As long as they are solid as a rock it won't b a problem .
Did you say its a 1st floor, if they are that solid you could cause structural damage to whatever is below, ive seen it on buildings after knocking off solid render, having to put cavity ties in so said building don't fall down 😉

 

[Time's Ran Out]

If you've got the job then you must have priced for doing it one way or the other - if not then there will be a loss on one way and an early finish the other!

 

[afright]

If they are solid leave them down run a grinder over the tile to score them then SBR by taking them up you do not know what you might find I never have had any problems with tiling on to existing tiles, if the floor is solid

 

[charlie1]

I dont think you will have any problems tiling over them if they are solid, I would still remove though, for all the work it wll take!!

 

[dave l and l]

pull one up and let us know how you get on. it might not be as solid as you think