Dust is one of the first worries people raise before booking a terrazzo polishing job, usually because they've heard about the mess traditional concrete or floor grinding can create. The honest answer is: it depends heavily on the method and equipment used, and a straightforward polish produces far less dust than a full diamond grinding job.
Wet Grinding vs Dry Grinding
Terrazzo can be ground either wet (with water fed onto the diamond pads to suppress dust and cool the abrasive) or dry (using a shrouded grinding head connected to a HEPA-filtered vacuum). Wet grinding produces almost no airborne dust but creates a slurry that needs to be squeegeed and vacuumed up as it's produced — messier in a different way, and not always practical in an occupied home. Dry grinding with proper dust extraction is generally the more practical choice for residential jobs, since there's no slurry to manage and cleanup is faster.
How Much Dust Does Extraction Actually Capture?
A well-maintained shrouded grinding system with a HEPA vacuum captures the large majority of dust at the point it's created, rather than letting it spread through the room. Some fine dust still escapes around edges, corners and where the shroud can't form a full seal against the wall — so the realistic expectation is "far cleaner than open grinding," not "completely dust-free."
A true polishing pass — refining an already-sound surface with fine diamond pads rather than grinding into the slab — produces meaningfully less dust again than a grinding job, since there's no bulk material removal involved.
What to Expect on the Day
Even with good dust control running, it's sensible to treat the day like any other renovation work: clear or cover electronics and open food items in the room being worked on, keep doors to unaffected rooms closed, and expect a light film of fine dust nearby that a normal wipe-down handles afterwards.
If you're in an HDB flat, check your unit's renovation permit conditions if grinding is involved, and be mindful of noise as well as dust — grinding equipment is loud, and that's usually the bigger source of neighbour complaints.
Worried about the mess in your specific unit?
Tell us your floor type and layout on WhatsApp and we'll explain exactly what to expect and how we prep the space.
