Driveways · Practical advice
Why do driveways sink?
Understand why a driveway can settle or develop dips. This guide looks beneath the surface at preparation, compaction, drainage and the loads a driveway carries.
Read the shape of the problem
A small dip beneath a regular wheel position tells a different story from a broad area dropping beside a house. Note where the settlement occurs, when it first appeared and whether it changes after heavy rain. Photographs taken from the same position help show whether movement is continuing.
Standing water, spreading joints and displaced edging are useful clues. They do not prove the cause individually, but they help a contractor decide what to inspect below the surface.
What can happen underneath
A driveway relies on the ground and supporting layers sharing the load. Poorly compacted material can settle as vehicles pass over it. Old service trenches and patches of made ground can behave differently from the surrounding area. Water may expose a drainage problem or weaken susceptible ground.
Sometimes the original construction was adequate for a car but not for later heavy loading. A delivery vehicle, skip lorry or repeated parking close to an unsupported edge can change the demands on the surface. Tell the contractor how the driveway has actually been used.
Repair the cause as well as the level
For block paving, a local repair may involve lifting and retaining the blocks, investigating the support, rebuilding the affected layers and relaying the surface to the correct levels. Repeatedly adding bedding material without addressing the underlying failure can leave the same problem waiting to return.
Resin, tarmac and concrete require different repair methods. The scope may extend beyond the visible depression, and a patch can remain visible. Ask whether the proposal is a lasting reconstruction, a cosmetic repair or a temporary measure, and what evidence supports that choice.
Reduce the chance of repeat movement
Keep drains working and avoid loads beyond the design of the driveway. Check edge restraints and record any returning dip early. If the area is close to a leaking drain or recently altered service, include that information in the inspection.
For new work, ask how variable ground will be treated and how the supporting layers will be compacted. These are more useful questions than asking only for a thicker top surface. Where movement is substantial or affects nearby structures, further investigation may be needed before paving repairs begin.
Common questions
Does every dip mean the whole driveway needs replacing?
No. A defined local failure can sometimes be repaired locally. Widespread weakness or continuing movement may require a broader reconstruction.
Will sealing a sunken driveway help?
A sealer does not restore support or correct levels. Deal with settlement and drainage before considering any finish treatment.
Discuss your project
Tell us what you would like to change and share photographs of the area. We can discuss the next steps for your property.