Polishing makes the most sense when there is already a sound slab in place and you want to get more out of it. If you are pulling up tired carpet, tiles or vinyl, the concrete underneath is often a better floor than whatever you were about to replace them with, and you avoid the cost of buying a new surface altogether. New builds are just as good a candidate, provided the slab is poured with polishing in mind from the beginning.
It also suits our climate. Polished floors stay cooler than timber through a run of thirty-five degree Melbourne days, they do not cup or lift the way boards and vinyl can once winter damp gets into a slab, and they wipe clean when wet shoes and garden mud come through the door. Garages, sheds, covered alfresco areas and open-plan living spaces all tend to work particularly well.
There are situations where we will tell you to look at something else. Badly cracked slabs, floors with significant moisture coming up through them, and heavily patched concrete can all be polished, but you may be better served by an overlay or resurfacing. We would rather have that conversation at the quote stage than after the grinder is running.