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  • Floors & finishes
  • 25–35 MPa

Grinding a Concrete Floor: Free Quotes from Local Contractors

Need a concrete floor ground? Tell us about the job and independent South African grinding contractors will send a free quote. No fee, no obligation.

  • Quotes fromconcrete grinding contractors
  • Areaall nine provinces
  • Cost to youfree

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Two floor grinding operators pushing a large planetary grinder across a bare concrete warehouse floor with a dust extractor beside them
Two floor grinding operators pushing a large planetary grinder across a bare concrete warehouse floor with a dust extractor beside them

Get a free concrete quote

Tell us what you need and where. A contractor or supplier who works in your area quotes you directly. Free, no obligation.

Pour docketPD 972519

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Length and width in metres, thickness in millimetres. Add a row for each slab, footing or path. The totals go into your request.

#Length mWidth mThick mmQty
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0m² area
0m³ concrete
06 m³ trucks

Order about 5–10% more than the net volume to allow for waste and uneven ground.

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Grinding a concrete floor removes a thin layer of the surface so the slab is clean, level and ready for what comes next. It is used before epoxy, polishing, tiling and glue-down flooring, and to remove trip-hazard lips, old paint and glue. ConcreteSlab.co.za is a free quote service. You fill in one form and we pass your request to independent floor grinding contractors in your area, who quote you directly. We do not grind, coat or pour anything ourselves. There is no fee and no obligation.

What concrete grinding does

A floor grinder is a heavy machine with rotating heads fitted with diamond tooling. The heads cut away a millimetre or two of the top surface. That removes the weak, dusty cement skin (laitance), opens the pores of the concrete and leaves a clean, rough profile that coatings and adhesives can grip.

Grinding is not the same as screeding or topping. It takes concrete away and does not add any. It can flatten small high spots and remove ridges, but it cannot fix a slab that is badly out of level or cracked right through.

Common reasons to grind

Most grinding jobs fall into a few groups.

  • Coating preparation: epoxy and polyurethane suppliers usually ask for a ground, dust-free surface.
  • Polishing: a polished floor starts with coarse grinding and moves through finer diamond grits.
  • Removing coatings: old paint, sealer, tile glue and carpet adhesive.
  • Trip hazards: lips at joints and cracks in garages, walkways and warehouse aisles.
  • Levelling high spots: before tiles, vinyl or a thin screed.

Dust, power and site access

Concrete dust contains fine silica, which is harmful to breathe. A good contractor grinds with a vacuum or dust extractor connected to the machine, and the operators wear respirators. Ask how dust will be controlled, especially in an occupied house, shop or factory.

Big grinders need three-phase power. If the site has none, or the supply is unreliable because of load-shedding, tell the contractors. They may bring a generator, or use a smaller single-phase machine that takes longer. Wet grinding is possible, but it leaves slurry that must be collected.

Access matters too. Machines are heavy and need a clear route in, and furniture or stock must be moved out before the work starts.

What affects your quote

People often search for the cost of grinding a concrete floor per square metre. We never give prices here, because every floor is different. Contractors will look at:

  • The floor area in square metres, and how many separate rooms.
  • How hard the concrete is, and its age. Power-floated slabs are harder to cut.
  • What must come off: bare concrete, paint, epoxy or tile glue.
  • The finish you need, such as light preparation or a deep grind.
  • Dust control, power supply and travel distance to your site.

Photographs of the floor and the planned finish help contractors quote accurately.

Comparing quotes for concrete grinding

The lowest figure is not always the best deal. When your quotes arrive, check:

  • Specification: the thickness, the concrete strength in MPa, the steel and the membrane, so every quote is for the same work.
  • Preparation: excavation, sub-base compaction, shuttering and who removes spoil and rubble.
  • Concrete and access: ready-mix or site-mixed, whether a pump is included and any part-load or waiting charges.
  • Finish, curing and guarantee: the surface finish, how long it will be cured, where joints are cut and what guarantee covers the work.

What to include in your request

  • Give the floor area in square metres.
  • Say what is on the floor now, such as paint, glue or bare concrete.
  • State what will go on afterwards: epoxy, tiles, polish or nothing.
  • Mention power supply, access for machines and dust concerns.
  • Attach photographs of the floor and any cracks or lips.

Frequently asked questions

Does ConcreteSlab.co.za grind concrete floors?
No. ConcreteSlab.co.za is a free quote service. You send one request and we pass it to independent floor grinding contractors near you. They contact you directly with a quote. We do not grind, coat or pour concrete, and there is no obligation.
Do I need to grind a concrete floor before epoxy?
In most cases, yes. Epoxy needs a clean, sound surface with an open profile to bond properly. Grinding removes laitance, sealers and old coatings. Your coating supplier will state the surface profile they require, so ask for it before work starts.
How much dust does floor grinding make?
With a dust extractor connected to the grinder, very little escapes. Without one, grinding makes a lot of fine dust that includes silica. Ask contractors how they control dust and whether operators wear respirators, particularly when the work is done indoors.
Can grinding fix an uneven concrete floor?
It can remove small high spots and ridges, such as joint lips. It cannot correct large dips or a slab that slopes badly. For that, contractors usually use a screed or a self-levelling compound over the ground surface. Ask for a site visit if you are unsure.

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