How does the process differ from having tiled, carpeted, or timber floors?

In a new build polished concrete floors are completed at the plaster stage before any skirts, cabinetry and joinery is installed.

Can grout lines be removed from concrete floors when polishing an old slab

It depends on how deep the grout lines are. We usually grind 3 – 5mm off the surface but can grind up to 10mm off so if they are deeper than that then they may still be visible in the finish.

Where can I see polished concrete?

Can we put lights in our concrete?

Can red wine stain a Polished Concrete floor?

Just like any other floor type, red wine will leave a stain if not attended to straight away.

Is it possible to have a polished concrete floor in a domestic house which will not crack and make the polishing ugly? Can concrete be reinforced to avoid cracking?

A structural slab and topping slab or screed should be reinforced but even with these measures there is no guarantee that the concrete will not crack. If your foundations move the slab will move which may cause cracking.

When do you put the stones in?

All concrete has aggregate in it.

What tips would you give in order to ensure the job is done smoothly and correctly?

Regular contact should be made between the builder or owner/builder and the concrete polisher to ensure polishing can commence and be completed at the right stages of the project.