Repair methods
Concrete grinding
Can the raised edge just be ground off instead of replacing the section?
Often, yes, and it is frequently the sensible proportionate answer. Grinding cuts the high side down until the lip is gone, which removes the trip hazard for a fraction of the cost of lifting or replacing.
What it does not do is restore the slab's profile or address why the edge rose. Understanding that trade is the difference between choosing grinding knowingly and being sold it as a fix.
What the method is
A grinder with a diamond cutting head removes material from the high side of the offset, tapering it down so the transition is walkable.
The work is fast — often a single visit, sometimes under an hour for one joint — and it is dry-cut or wet-cut with dust extraction.
The ground area is visibly different: lighter, smoother, and often with exposed aggregate where paste has been cut through.
What it does not do
- It does not restore the panel to its original height or profile, so drainage across the joint is unchanged or slightly altered.
- It does not address the cause — a root keeps growing, frost keeps cycling, a void keeps developing.
- It removes thickness from the slab at that point, which matters where the slab is already thin.
- It leaves a visible difference in colour and texture that does not weather out quickly.
What you can safely check yourself
- Establish whether the lip is from something rising or something settling, since grinding suits the first better.
- Note whether the cause is progressive — a growing root will re-create the lip.
- Note whether drainage matters at this joint, since grinding does not restore fall.
When professional evaluation matters more
- The displacement is increasing, so the lip will return
- The slab is thin and grinding would reduce it meaningfully
- The joint needs to drain, which grinding does not restore
Questions to ask whoever comes out
- How much material are you removing, and does that matter for this slab's thickness?
- Will the ground area look obviously different, and for how long?
- Is the cause still active, and if so how soon might the lip return?
- Would lifting be a better use of the money here, and by how much more?
- Is dust being controlled, and how?
Where estimates for this commonly differ in scope
These are the places two prices for apparently the same work stop being comparable.
- Grinding is a hazard remedy; lifting is a profile remedy. Both get described as fixing uneven concrete.
- The number of joints being ground is often approximate and worth pinning down in writing.
- Appearance consequences are rarely mentioned in advance.
Usually worth planning a repair
Conditions in this band do not usually become emergencies, but they rarely improve on their own and repair costs tend to rise with the affected area.
Who tends to do this work
- A concrete repair specialist
- A residential flatwork concrete contractor
ConcreteOwner does not inspect, certify or approve contractors. This describes which trade usually holds this work, not a recommendation of anybody in particular.
Common questions
Is grinding a permanent fix?
It permanently removes the material it removes. Whether the problem is permanently solved depends on the cause — grinding a lip caused by a growing root buys time rather than a solution, while grinding a lip from movement that has finished can be the end of the matter.
Will the ground patch be obvious?
Yes, initially and for some time. Grinding exposes fresh concrete and often aggregate, so the area is lighter and smoother than the weathered surface around it. It becomes less obvious as it weathers but does not disappear.
Grinding or lifting?
Grinding is cheaper and removes the hazard; lifting is dearer and restores the profile, including drainage. If the concrete has settled and you want the fall back, lifting. If something has risen and you want the trip lip gone, grinding is usually the proportionate choice.
Where to go next
Related problems
What drives the cost
Methods that may apply
Want a straight answer about grinding?
Both decision tools are free and need no contact details. If you would rather have somebody local look at it, you can ask us to review whether we can match you — and we will say plainly if we cannot.