Which adhesives?

[Levo-Lon]

@derrick got it right , just lay em'

Works fine as long as the tiles are held all round with a wall and a threshold
Any un_retained open edge will creep.

 

[Beebo]

I would get a large remnant from a carpet shop. Cheaper than tiles and easy to lay and remove.
If for some reason you want to remove the carpet tiles you will have a sticky floor for ever. The glue is impossible to remove.

 

[screenman]

I would tile with underfloor heating installed first, which is what will happen with my next build, hopefully.

 

[fossyant]

Oil and carpets... hope you aren't as messy as me - always get some sort of chemical on my garage floor.

 

[Cycleops]

If the surface is dusty and loose you will need to lay a thin coat of latex screed which is self levelling.
You can stick just the perimeter and loose lay the rest as said if good quality. Make sure you buy tiles with a good thick backing, this will ensure they are dimensionally stable and won't get kicked up and dog eared. Buy some overage to allow for replacements. Use a permanently tacky glue from a carpet fitters supply shop where you can also buy the screed.
Some tiles have a top surface made from pigs hair which can be scrubbed with detergent.

Good luck.

 

[derrick]

Any un_retained open edge will creep.

Why would you lay them that way?

 

[Levo-Lon]

Why would you lay them that way?

People do if they have a few tiles from a job or acquired a load..
So they put them in a garage for instance.
Or they don't cut them in and stop short..

 

[Milzy]

If the concrete is smooth, then something like this will probably do the job.

https://www.screwfix.com/p/no-nonsense-contact-adhesive-natural-500ml/32657

you get specialised “carpet tile adhesive” sprays, but I think it’s pretty much the same stuff.

I think that’s the best no nonsense reply!
Thanks.