Can I have the timber and carpet floors level with the concrete?

Yes, most definitely. Levels are another important reason for you to communicate with your Builder and Concreter.

We have a tiled floor but they are old and don't look very good. We are thinking of going polished concrete but how do we get all the glue off and do we have to pour new concrete on top of the mess that will be underneath the tiles?

Usually this is not required, once the tiles have been removed the remaining glue and mess can be ground to a brand new surface. However there can be exceptions.

Can we put lights in our concrete?

We have a garage with a maroon type colour concrete floor. It has a few paint stains etc on it. I was thinking of giving it a good sanding, with some type of machine no doubt & then painting some kind of clear sealer on it. Can any concrete floor be sande

Yes, any concrete floor can be ground and sealed or mechanically polished.

How long does it take to polish a concrete slab?

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.

What is the best way to finish off a burnished floor?

Burnished concrete flooring can either be machine polished or coated with a penetrating sealer. Most people we work with usually opt for a machine polished finish.

What about aggregates in concrete mix? What is generally available and what is recommended?