Car park resurfacing
Renewing a worn, cracked or potholed car park — with an honest answer about whether an overlay will actually hold.
In short
There are two routes. An overlay lays new material over the existing surface and is quicker and cheaper, but only works where the base below is sound. Planing removes the worn layer to a set depth and replaces it, which costs more, keeps levels the same and is the right answer where the existing surface is breaking up.
On this page
Overlay or plane and re-lay? · What we look at during the survey · Keeping the site open · What it costs, and why quotes differ
Most car parks do not fail evenly. You get crazing round the entrance where vehicles turn, ponding in one corner, a few potholes where water has sat, and a large area that is simply tired. The decision is whether the base underneath is still doing its job.
If it is, an overlay gives you a decade or more for a fraction of the cost of a rebuild. If it is not, an overlay will crack through within a couple of winters — and we would rather tell you that at survey stage than take the order.
Overlay or plane and re-lay?
| Overlay | Plane and re-lay | |
|---|---|---|
| What happens | New surface course laid over the existing one | Existing surface milled off, new material laid to the same level |
| Suits | Sound base, worn surface, levels can rise | Failing surface, fixed levels at kerbs, gullies and thresholds |
| Levels | Rise by the depth laid | Unchanged |
| Relative cost | Lower | Higher |
| Programme | Faster | Adds planing and carting away |
Levels are the practical constraint people forget. Raising a surface by 40mm against a doorway threshold, a gully or a kerb upstand causes problems that are more expensive to fix than the saving.
What we look at during the survey
- Where water sits after rain, and why
- Whether cracking is surface crazing or structural — reflecting up from below
- Rutting and deformation in wheel paths and turning areas
- Condition at gullies, covers, kerbs and thresholds
- Any localised failures that need digging out before anything is laid over them
- Whether the loading has changed since the car park was built
Digging out and rebuilding the failed areas first, then overlaying the rest, is often the most economical answer on a large car park — and it is the one most quotes leave out.
Keeping the site open
Resurfacing is phased in the same way as new construction: sections taken in an agreed order, barriered off, surfaced, reopened. For retail and hospitality sites we would usually recommend overnight or early-week working. For schools, holiday periods. For offices, weekends.
What it costs, and why quotes differ
Two quotes for the same car park often differ because one includes things the other leaves out. When comparing, check whether each price covers:
- Dig-out and repair of failed areas before overlaying
- Adjusting gullies and covers to the new level
- Correcting falls where water currently ponds
- Full line marking reinstatement, including hatching and disabled bays
- Removal and disposal of arisings
- Out-of-hours or phased working
How projects run
The same five stages on every job, scaled to the site.
Site survey
We measure the area, assess the existing surface and ground conditions, and check access for plant and deliveries.
Specification and quote
A written quote setting out the build-up, depths, materials, drainage, edgings and what is excluded.
Preparation
Planing or excavation, removal of arisings, sub-base laying and compaction, plus any drainage and kerbing.
Laying
Binder and surface courses laid and rolled to the specified depth, with joints and levels set out against falls.
Handover
Line marking where required, site cleared, and written guidance on when the surface can take traffic.
Questions we get asked
Anything not covered here, call 0208 050 7207.
A well-built car park surface usually lasts 15 to 20 years, but that depends on loading and drainage far more than age. Sites where water ponds, or where HGVs turn on an area built for cars, wear out much faster. Small repairs carried out early extend the interval considerably.
Often, yes — provided the base is sound and levels allow. Where the base has failed, an overlay simply cracks through, so we check before recommending it.
They have to be adjusted to the new level as part of the job. If a quote does not mention covers and gullies, ask — leaving them proud or sunk causes damage and complaints within weeks.
Yes, normally as part of the same job. It is also the best time to change the layout if you want more bays or a different circulation pattern.
For a phased job, each section is typically out of use for a day or two. We agree the phasing with you before starting so you can tell staff and visitors what to expect.
Related services
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