The short answer depends on one thing: whether the slab underneath is still structurally sound. Here's how to tell — including when we'll tell you resurfacing is the wrong answer.
Resurface if the slab is structurally sound and the damage is cosmetic or limited — surface cracking, spalling, staining, or a dated finish across less than roughly a quarter of the area. Replace if the slab has failed structurally: alligator cracking across the surface, sections that have sunk or separated at different heights, crumbling edges, or grading so far gone that water stands on it after every storm.
Resurface when
The base is stable and the damage is on the surface.
Replace when
The slab has moved, sunk, separated, or is breaking apart.
Cost difference
Resurfacing typically runs a fraction of full replacement.
Time difference
Days for an overlay; weeks of disruption for a tear-out and repour.
A single crack — even a long one — is usually not a reason to replace a driveway. Width, movement between the two sides, and whether it keeps coming back after repair matter far more than length.
In Charleston specifically, check what is under the slab before deciding. Water eroding the base is the most common reason concrete here cracks, sinks, and then cracks again after being patched.
If a contractor recommends resurfacing without looking at drainage, grading, or the edges of the slab, get a second opinion.
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What each option costs, and how long it takes
Option
Typical range
Timeline
Disruption
Resurfacing (bonded overlay)
$3–$7 per sq ft
Typically a matter of days
No tear-out; existing slab stays in place
Stamped or decorative overlay
$8–$12 per sq ft
Typically a matter of days
No tear-out; pattern and color applied during the overlay
Full replacement (tear-out and repour)
$5–$20+ per sq ft
Commonly weeks start to finish
Demolition, haul-off, repour, and a cure period before use
General market ranges for context, confirmed after a real assessment — not a quote for your specific job. See the full breakdown on our pricing page.
How to tell if your slab is a resurfacing candidate
Cracked but sound — resurface
Hairline to moderate surface cracking, with both sides of the crack still at the same height
Spalling, pitting, or flaking limited to the top layer of the surface
Staining, fading, or a finish that simply looks dated
Damage concentrated in one area rather than spread across the whole slab
Edges still intact and square, not crumbling away
Failed — replace
Alligator cracking — an interconnected web of cracks across the surface
Sections sitting at visibly different heights, or a slab that rocks underfoot
Cracks wider than about a quarter inch that keep reopening after repair
Edges and corners breaking apart, with aggregate coming loose
Water standing on the slab after every storm because the grade itself has failed
Damage covering roughly a quarter or more of the total surface
We'll tell you when resurfacing is the wrong answer
Resurfacing is what we do, so it would be easy to say yes to every slab. We don't. An overlay bonded to concrete that has already failed structurally will crack again along the same lines, usually within a season or two — and you'll have paid for the overlay and still need the replacement. If that's what your slab is, we'll say so at the assessment, and tell you what the honest fix looks like.
The same goes for what's happening underneath. In Charleston, a large share of cracking traces back to water eroding the base out from under the slab. Resurfacing over an unresolved drainage problem hides it for a while and changes nothing — which is why drainage and erosion repair is often the actual fix, with resurfacing handling the cosmetic result on top.
Is my driveway sinking? The 2-minute settlement test before you resurface
Settlement and surface wear look similar from the driveway and cost very different amounts to fix, so check three things before you spend anything. Run a string line taut across the slab from one sound edge to the other and look for a dip — a slab that has settled sits lower in the middle or at one end rather than wearing evenly. Look at the joints against fixed points: gaps opening at a garage apron, a walkway, or a door sill mean the slab moved, not the surface. Then watch where water goes after rain — standing water or a downspout discharging beside the slab is the mechanism that erodes base material out from underneath. If any of those show up, resurfacing over the top is money spent on a surface that will move again; the base has to be addressed first. This matters more here than in most markets because Lowcountry soils hold water and compress.
How long does concrete resurfacing last in Charleston?
National guidance for a bonded overlay is roughly 5 to 12 years, and longer with maintenance, but the local variables are what actually decide it. Marsh and clay soils that hold water let the base under a slab shift; heavy tropical-season rain and poor drainage accelerate that; and salt air is hard on unsealed or poorly sealed surfaces. An overlay on a stable, well-drained slab that gets resealed on schedule sits at the long end of that range. An overlay on a slab with an unresolved drainage problem does not, no matter what product goes on top.
Is resurfaced concrete as durable as new concrete?
When it is bonded to a structurally sound slab and prepped properly, an overlay is a long-term surface, not a temporary cosmetic fix. The durability question is almost never about the overlay material — it is about what is underneath. An overlay is only ever as stable as the slab and base it is bonded to, which is why the assessment matters more than the product.
Can you resurface concrete that has already been patched?
Usually yes. Previous patches get ground down and incorporated during prep. What matters is whether the patches were cosmetic or whether they keep failing in the same place — repeat failures in one spot usually mean the base underneath is still moving, and that has to be addressed before anything goes on top.
How thick is a concrete overlay?
Resurfacing overlays are thin by design — a bonded layer over the existing slab rather than a new slab. That is what keeps the driveway at the same height relative to your garage, walkway, and landscape, and why resurfacing does not create the transition and clearance problems a full repour can.
Does resurfacing fix a drainage problem?
No, and it is worth being direct about that. If water is pooling on or running under your concrete, resurfacing changes how the surface looks without changing where the water goes. The drainage work comes first; the resurfacing goes on top of a base that will hold.
How long should I wait before deciding?
If the cracking is cosmetic, waiting mostly costs you appearance. If water is getting under the slab, waiting is expensive — every storm moves more base material out from underneath, and a slab that could have been resurfaced this year can be a replacement next year.
