Tiles on a concrete floor butted together

[GandalfFTW]

Hello everyone, it's me again.
I'll try to make this as short as possible. A good friend of mine had the floor in his studio (about 30 sq.meters) re-tiled recently and the tiles are butted together (no grout lines). I've read all the previous threads on this subject, so for me that's not a good practice. I am talking about a concrete floor, by the way. His tiles are not expensive, about 20 Euros (210 SEK as we are in Sweden) per square meter, and over here that's as cheap as it gets.
So, is it acceptable to butt up (cheap) tiles if the substrate is concrete? I hope this makes sense.

I think that "there will be tears", as one of the members on here said.

Thank you.

 

[Unused Account 1]

Very hard to butt up ,as cheap tiles come up sightly


different sizes ,so would advise,
not to butt up

 

[GandalfFTW]

Yes, some of the "grout lines" were crooked. You are right. Even a small grout joint can relieve some of the stress caused by movement, but with concrete, I am not sure if there's enough movement to cause damage over time.

 

[Spare Tool]

By the laws of physics everything contracts and expands with changes in temperature and that includes tiles and concrete..."there will be tears"

 

[GandalfFTW]

Thank you for your help and time, gentlemen.

All the best.

 

[On one]

Just by chance, saw this on today's tiles.
''Technical reasons''........aka not square, not flat, not parallel....