Breaking out and hauling off an old slab is a real line item on its own, before any new concrete is ordered, and on a full driveway replacement it typically adds 15 to 25 percent to the job. That is why an honest read on repair-versus-replace is worth getting before you commit either way.
Here is the decision framework we actually use. Hairline cracks that follow the control joints: normal, seal them, move on. Cracks that widen past a coin, sections dropping relative to their neighbors, or slabs that rock under a truck tire: the base is involved, and surface work alone will not hold. Spalling and scaling: usually a surface fix if caught early, a replacement conversation if the aggregate is showing across large areas. One sunken but sound section: often a lift, not a tear-out. We walk the slab with you and put the recommendation in writing, and if the honest answer is that a repair buys you three years and a replacement buys you thirty, you get both numbers and you make the call.
| What changes | Effect on your price |
|---|---|
| Repair method | Sealing a crack, patching a spall, resurfacing a whole slab and replacing a section are four different jobs at four different prices. The right one depends on the base, not on the crack. |
| Whether the base has failed | This decides everything. Sound base means repair is the right spend. Failed base means a repair will crack again in the same place and replacement is the honest answer. |
| Resurfacing instead of replacing | Where the slab is structurally sound, resurfacing over it costs meaningfully less than a tear-out and skips removal entirely. |
| Tear-out of the existing surface | Adds roughly 15 to 25 percent, depending on slab thickness and how easily a machine can reach it. |
| How many separate areas | Several small repairs in different spots cost more than one continuous area of the same total size. |
| Cause correction | If water or a tree root caused it, fixing the cause is priced on top. Skipping it means paying for the repair twice. |
| Concrete truck access | Tight lots, long wheelbarrow runs and pump trucks all add labour to the exact same square footage. |
Call or text with the rough size and what is there now. A photo of the space answers half the questions before anyone drives out.
Someone walks the job, measures it, checks access and drainage, and leaves you a written number. Free, and there is no pressure attached to it.
Once you approve the price the work gets scheduled around the weather window. You get a start date and a realistic finish date, not a vague week.
Repairs are a compromise by definition. Understanding which compromise you are choosing is the point.
This is worth saying plainly because it is the most common source of disappointment. A repair placed into existing concrete will differ in colour and texture from the surrounding slab, and it will stay visibly different. It fades toward the original over years but it never disappears. Where appearance genuinely matters, resurfacing the whole panel or replacing to the nearest joint gives a result people are much happier with.
Repairing the damaged patch is cheapest and most visible. Replacing to the nearest control joints costs more, matches better, and leaves a clean line rather than a scar. Full replacement costs the most and is the only option that resolves an underlying subgrade problem across the whole area. On a front walk or a visible patio the middle option is very often the right value.
Sealing or overlaying a slab that is still moving, still getting wet from the same source, or still corroding internally hides the problem for a season and makes the eventual repair larger. If the diagnosis identifies an active cause, that gets fixed first even when the visible damage is small.
Same techniques, different thresholds for acting.
Driveway scaling, cracked walkways, spalled steps and patio damage. The practical guidance for homeowners is to act on anything that lets water in, because water entering a crack and freezing is what turns a small repair into a replacement over a few winters. Cosmetic damage on a sound slab can genuinely be left alone.
Commercial repair is generally driven by liability, by operations or by an inspection finding. Trip hazards get priority regardless of appearance, and joint and edge damage in traffic areas gets addressed early because it accelerates. Commercial repairs are frequently scheduled outside operating hours, which favours fast setting materials even at higher cost.
Every worthwhile concrete repair starts with a diagnosis rather than a product. Concrete does not fail randomly, and a repair that treats the symptom without addressing the cause is a repair that gets done twice.
Surface scaling, structural cracking, settlement and steel corrosion look different and are caused by different things. Scaling usually points to freeze and thaw damage or de icing salts on concrete that was not air entrained or was sealed poorly. Cracking that steps or widens points at ground movement. Rust staining with spalling above it means the reinforcement is corroding and expanding. Each of these needs a different repair, and two of them will recur if only the surface is addressed.
This is the conversation worth having early. Repair is right for localised damage on a fundamentally sound slab. Replacement is right when the damage is widespread, when the slab is structurally compromised, or when the underlying cause cannot be fixed without lifting the concrete anyway. Repairing a slab that needs replacing is the most common way money gets wasted in this category.
Damaged concrete is cut back to solid material with square edges rather than feathered ones. Feather edges fail. If reinforcement is exposed and corroding, it is cleaned or replaced and treated before anything covers it.
The repair area is cleaned and profiled so the repair material can key in mechanically. A bonding agent is used where the system calls for one.
Matched to the application and to the depth being filled, worked into the edges and consolidated. Depth matters: a material designed for a thin patch will fail if used at depth and vice versa.
Repair materials have their own cure requirements and they are frequently more demanding than the original concrete, because the patch is thin and dries fast. Curing a repair properly is what makes it last.
Fix the drainage, seal the joint, redirect the downspout or correct the grade. This is the step that determines whether the repair is permanent or temporary.
Repair materials generally have narrower temperature windows than fresh concrete, so cold and very hot weather push repair dates more often than they push pours.
Concrete Repair & Replacement across Winston-Salem, Kernersville, Walkertown, Rural Hall, Union Cross, Pfafftown, Clemmons, Lewisville, Stanleyville, Belews Creek, King, Germanton, Oak Ridge, Colfax, Summerfield, Stokesdale, Wallburg, Midway and Welcome.
Most jobs touch more than one of these. If you are already pricing concrete repair & replacement, it is usually worth pricing anything else you have been putting off in the same visit, because the mobilisation is already paid for.
