When do you put the stones in?

All concrete has aggregate in it.

Can the slab be heated?

Yes, any slab can be heated. With in-slab hydronic heating on a polished concrete you will never live on a better floor.

Is there much dust when you polish a slab? Do the neighbours need to be warned?

Can cracks be filled?

Yes, but it is best to leave fine cracks for a couple of years as there may be a chance the cracks will close again with movement.

When is it the best time to speak to my polisher?

Are concrete floors cold? Do we need to heat them?

Depending on where you live in the country, particularly in southern states heating would probably be preferred and radiates a lovely warmth. In warmer states and in summer down in the southern states nothing is cooler.

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.

Can concrete hearths or steps be polished?

Hearths and steps can be polished. Steps will need to be stripped, hand trowelled and filled on the day of pour.