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  • Contractors, cutting & repairs
  • 25–35 MPa

Concrete Repairs in South Africa: Free Quotes from Local Contractors

Cracked, sinking or spalling concrete? Tell us the problem and independent South African contractors will send a free repair quote. No fee, no obligation.

  • Quotes fromconcrete repair specialists
  • Areaall nine provinces
  • Cost to youfree

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A repair crew working on a cracked concrete driveway, one worker cleaning a crack and another mixing repair mortar in a bucket
A repair crew working on a cracked concrete driveway, one worker cleaning a crack and another mixing repair mortar in a bucket

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 731689

Pour calculator (optional)

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
1×××
2×××
3×××
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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Free and no obligation. By sending you agree that we may share your request with a suitable contractor or supplier. See our privacy policy.

Cracks, flaking, rusty stains and slabs that have dropped are all signs that concrete repairs are due. Fixing them early is usually cheaper than waiting. ConcreteSlab.co.za is a free quote service. You fill in one form and we pass your request to independent repair and concrete contractors in your area, who quote you directly. We do not repair or pour concrete ourselves. There is no fee and no obligation, and you can compare contractors and their proposed methods before you decide.

Common problems and what causes them

Concrete rarely fails without a reason. Knowing the cause matters, because a patch that ignores it will fail again.

  • Shrinkage cracks: fine cracks from drying. They are often harmless but let water in.
  • Structural or settlement cracks: wide, stepped or growing cracks, often from heaving clay, collapsible sand or poor compaction.
  • Spalling: pieces breaking off where reinforcing has rusted and swelled. Coastal air and thin cover make this common.
  • Sinking slabs: ground washed out by leaking pipes or poor drainage.
  • Surface wear: dusting, scaling and frost damage on the Highveld.

How repairs are done

The method depends on the damage. A contractor will inspect first and explain the options.

Fine cracks are cleaned and filled with a flexible sealant or injected with resin. Wider cracks may be routed out and filled, or stitched with steel staples. Spalled areas are cut back to sound concrete, the exposed steel is cleaned and treated, and a polymer-modified repair mortar is applied. Large patches may use formwork and a small pour of ready-mix.

Sunken slabs can be raised by injecting grout or foam beneath them, or removed and re-poured. Surface wear is dealt with by grinding, resurfacing or a new topping.

Repair or replace

Repairing is not always the right answer. If the slab is thin, badly cracked all over or has failed because of poor ground, a new pour may last longer than a patch.

  • Isolated cracks and local damage are usually worth repairing.
  • Widespread breaking or a failed base points to replacement.
  • Cracks in suspended slabs, beams or columns need an engineer before any work.
  • Cracks in a house wall or foundation may need an engineer's report for the insurer or NHBRC.

Ask contractors to explain the cause and why they chose their method.

What affects your quote

People often search for the cost of repairing a cracked slab, but each repair is different. We never give prices here. Contractors will look at:

  • The type, length and width of the cracks, and the area damaged.
  • Whether reinforcing is exposed and corroded.
  • The repair method and materials chosen.
  • Whether the slab needs lifting or the ground needs fixing first.
  • Access, travel distance and any minimum call-out.

Photos and a short description help contractors quote well.

Comparing quotes for concrete repairs

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

  • Photos of the damage, with something for scale
  • Where it is, how long the cracks are and how wide
  • Age of the slab and whether it has moved
  • Any leaking pipes or drainage problems nearby
  • Whether you need an engineer's report

Frequently asked questions

Does ConcreteSlab.co.za repair concrete?
No. ConcreteSlab.co.za is a free quote service. You send one request and we pass it to independent concrete repair contractors near you. They contact you directly with a quote. We do not repair or pour concrete ourselves, and there is no fee for the introduction.
Are cracks in my concrete slab dangerous?
Most hairline cracks are only cosmetic. Wide cracks, stepped cracks, or cracks that keep growing can point to movement in the ground or a structural problem. Have those inspected by a contractor or engineer before repairing them.
Why is the concrete flaking and showing rusty steel?
Reinforcing steel rusts when water and air reach it, and rust takes up more space than steel. That pushes off the concrete cover. Near the coast, chlorides speed this up. The steel must be cleaned and protected before the patch goes on.
Can a sunken slab be lifted instead of replaced?
Often it can. Contractors inject grout or foam under the slab to raise it. This works only if the cause, such as a leaking pipe or washed-out ground, is fixed first. If the slab itself is broken, replacing it may be better.

Concrete Repairs by province

Concrete Repairs by city and town

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