Reading the surface
How do I know if my driveway needs replacing instead of sealing?
A driveway needs replacing once the base has failed under roughly a quarter to a third of the surface, because past that you are patching patches.
The numbers
- Solid underfoot with surface cracks: seal it.
- A few failed areas in an otherwise sound drive: repair those, then seal.
- Roughly a quarter to a third of the surface failed: an overlay or replacement becomes better value.
- Failure means alligator cracking, areas that flex, or potholes, not color and not age.
The walk that answers it
Go out and walk the whole drive, stepping firmly. You are looking for anywhere it gives under your weight. Those areas have lost their base. Mark them in your head and look at how much of the total they add up to.
Then look at the cracking. Lines are surface cracks. Networks of connected squares are base failure. Then look at whether water stands anywhere after a rain, because standing water is a base failure that has not finished yet.
Why a quarter to a third is the turn
Below that, cutting out the failed areas and rebuilding them costs less than a new surface and gives you a drive that holds up. Above it, you are patching patches: the repairs start meeting each other, the seams multiply, and every seam is another place for water to get in.
At that point an overlay over a sound base, or a full replacement where the base is gone too, is the cheaper answer measured over the years you keep the property.
What does not decide it
Age does not. What a drive has had done to it matters more than how long it has been there, and two drives poured the same year can be in completely different shape.
Color does not either. Gray means the top has oxidized. It says nothing about what is under the surface, and it is the most common reason a sound drive gets torn out early.
The one thing that decides it is how much of the base is still doing its job, and that is a judgment about your drive rather than about driveways. Send us a photo of the worst area and we will tell you which of the three you are looking at.