DelGrosso Design also specializes in concrete polishing. This process, besides restoration of old and worn out concrete, consist into finishing of new concrete floors to a medium or high gloss.

What is commonly called "concrete polishing" is actually a multiphase installation. On old concrete the first phase consists on "grinding" the surface; this process often exposes the stone aggregate present inside the slab. Sometimes this phase is more pronounced to create the so called "terrazzo" finish.

The next step is called "honing", where the surface is smoothed out to a medium gloss (#800 grit diamond disks). During this phase a water based fortifying product called "densifier" is sprayed on the surface to increase the superficial strength of the floor slab and make hard enough to go through the next phase.

The last phase is the "polishing", in which the honed surface is polished with progressively finer diamond grit disks (generally up to 3500 grit). At this point the concrete floor will have a good sheen, but not yet as high as it could be.

The high gloss finish is normally achieved by applying a protective water based sealer usually containing siliconates, and finally burnishing (high speed buffing) of the surface.

The polishing process has been developed centuries ago in Europe, where most of the buildings (cathedrals, public halls, museums and more) needed a floor finish with a  luster. Over the last decades modern technology made possible the polishing to become affordable to the residential clientele.

Our polishing equipment is manufactured in Europe, where polished concrete and stone are a traditional element of architecture.