Guide · Driveways
Reading a driveway that has started to fail
Interlocking repair on a driveway starts with diagnosis. Vehicle loads land in the same tracks every day, so failures appear in specific, readable patterns. Each one points toward either a local fix or a rebuild.
What each symptom indicates
Ruts along the wheel tracks
Two parallel hollows run the length of the drive, deepest where cars stop. That is the signature of an under-built base: too shallow for the load, under-compacted, or both. It is the usual outcome when a driveway is built to a patio specification.
Relaying the surface without correcting the base brings the ruts back. When they run the full load path, the realistic scope is rebuilding that path, which covers most of a typical residential driveway.
A single sunken area
One defined dip outside the wheel tracks, with sound paving around it, points to a local cause. Typical culprits are a loosely backfilled trench, buried organic material, or a soft spot paved over instead of removed. Away from the load path, rebuilding just that area is a lasting repair.
Edges spreading outward
Joints widen toward a free edge, courses fan out and the border loses its line. The perimeter restraint has let go. Turning vehicles keep pushing sideways, so the field unravels from the outside unless the edge is repaired before the spread reaches the centre.
Standing water near the garage
The fall may never have been right, the surface may have settled into a low point, or the drain may be blocked or unconnected. On a driveway sloping toward the house, this is urgent. The base is being saturated under the heaviest loads, beside the foundation, and it freezes in place.
Cracked or scaling units
Cracks in the wheel path mean the unit has lost even support and is bridging a void. Scaling, where the face flakes away, is usually chemical and most often follows heavy salt use. Cracking calls for opening the base; scaling calls for less salt and, in time, replacement units.
Empty joints
Open joints are a structural issue, not a tidiness issue. Joint material is what lets units brace one another, and without it each paver moves alone. Under vehicle loads, that loosening advances faster than anywhere else on the property.
Resetting it properly
When a reset is the right call, treat it as a small rebuild. Units come up in sequence, the base is excavated to sound material and recompacted in lifts, and joints are refilled beyond the repair boundary. The interlocking repair guide covers that reset sequence in detail. On a driveway, what differs is what gets checked first and how deep sound material turns out to be.
The test excavation
A section can look fine and still be too shallow for vehicles. Opening a small test area is the only reliable check. An undersized base can carry a car for years before it shows, so one rutted strip often means the shortfall runs throughout.
Habits that extend a driveway's life
Two winter habits shorten a driveway's life more than anything else. A steel blade dragged across the pavers chips their edges and scours the face; a plastic edge or rubber plough shoes avoid it. Most driveways also get far more salt than clearing requires, and using less spares the concrete surface years of scaling.
Check the joints each spring as well. Topping up joint material takes a morning. Relaying a field that spread after its joints emptied takes far longer.
If the driveway is being rebuilt, revisit the layout at the same time: the driveway design guide covers widths, borders and the street edge.
Assessment
What a site visit checks
Levels along the load path
Sighting low along the wheel tracks reveals settlement that a standing view hides.
The perimeter
Whether restraint exists, what anchors it, and whether the border still runs true.
A test excavation
Opening a small area shows the real base depth and what lies beneath it. Nothing else gives certainty.
Where the water comes from
Downspouts, neighbouring grades, the street slope, and whether the low point drains anywhere.
The garage threshold
Levels at the door, and whether water can reach the building.
The units themselves
Whether enough sound stock survives to relay the area, or replacements are needed and can be matched.
Questions
Driveway repair questions
Can wheel-track ruts be fixed without rebuilding the driveway?
Sometimes. If the ruts are confined to one stretch, that strip can be lifted, its base rebuilt to the right depth and the units relaid. Ruts usually come from a base too shallow or too loosely compacted under the load path, though, and that path runs the full length. Where they show in one spot, the same shortfall is usually developing elsewhere.
Why is the edge of my driveway spreading?
The edge restraint has failed, was anchored in bedding sand instead of compacted base, or was never installed. Without confinement, turning tyres push the outer courses outward and the joints open progressively inward. The repair happens at the perimeter, and early repair is smaller because the spread keeps going.
Why does water pool at the bottom of the driveway by the garage?
A driveway falling toward the house needs a drain at its low point, and that drain is missing, blocked or has no outlet. Treat it as urgent. The water soaks the base exactly where loading is heaviest and freezes there in winter.
What decides whether a repair or a rebuild costs less?
How much of the load path has to be reopened. A local repair excavates a few square metres, while a rebuild excavates the whole base, and that excavation and disposal volume drives most of the difference in interlocking driveway cost. The pavers themselves are a smaller factor. Repeated patches over several years, each treating one symptom of the same shallow base, usually end up the costlier route.