Cracked Driveway Surface? We Find the Cause Before We Fix It in Wolverhampton

A crack in a driveway is rarely just a crack in a driveway. Sometimes it really is nothing more than the surface ageing — an old concrete drive will develop hairline cracks over decades and they can stay stable for years. But other times the crack is the visible end of a problem lower down: a soft or eroded subbase, a tree root lifting the slab, or water washing away the material the surface sits on. Repairing the surface without understanding the cause means the crack usually reappears, and this page explains how we tell the difference.

What causes driveways to crack

The common causes are worth understanding because each leads to a different fix. Age and weathering simply make concrete and tarmac brittle: fine cracks appear in the surface and, while unattractive, they may not get worse. Water is a bigger enemy — if a driveway has been laid without an adequate fall or the joints and cracks let rain in, frost then opens the cracks wider each winter as water freezes and expands. Inadequate or compacted-poorly subbase is the most serious cause: when the load-bearing layer beneath the surface is too thin, soft or disturbed, the surface flexes under vehicle loads and cracks in straight or wide lines where the movement is greatest. Tree roots and heavy vehicles parked in the wrong places round out the list.

How we assess the crack

We start with the pattern, because patterns tell stories. Single straight cracks are often old contraction joints that have opened; a crack running alongside the drive at slab width suggests movement at a joint; a cluster of cracks over one area, or a crack that has visibly widened and stepped, points to the ground or subbase moving beneath. We check whether the surface either side of the crack is level, press and probe to find any hollow or soft spots, look at the edges where the subbase is often weakest, and follow where water goes — pooling after rain, or draining towards a crack, is a strong clue that water is getting under the surface.

Repair options

If the surface is sound and the crack is shallow and stable, a flexible crack filler or resin repair can seal it against water and frost, and that may be all you need. Where cracks have let water in for years, we clean them out properly before filling so the repair bonds to sound material. If our assessment shows a soft subbase or an area that has settled, we will say so plainly: a surface repair there will not last, and the honest options are to excavate and rebuild that section or, on older drives with widespread failure, to consider the surface a candidate for replacement. For that larger work, we quote after survey because the scope — depth of excavation, volume of material, disposal — is not something we can price blind.

Limits we are honest about

We do not guarantee that a repaired crack will never reappear, particularly where water, frost and vehicle loads keep working on the surface. What we can do is repair the cause as well as the symptom, give you realistic expectations, and tell you what to watch for. If digging is involved, we locate underground services carefully and use detectors where appropriate, but no scan can guarantee exactly what lies below, and utility plans and a safe dig approach remain part of the arrangement we will explain to you.

Aftercare and when to call

Keep the drive swept and the cracks and channels clear of leaves and grit so water has somewhere to go rather than under the surface. Recheck any filled crack after the first hard winter and call us if it reopens, widens, or starts stepping — those are signs something underneath is still moving. Call sooner if the crack is in front of a parked vehicle and is starting to break up, because potholes are cheaper to prevent than to excavate and rebuild.

Booking a visit

Booking is straightforward: pay the booking fee when you book, and labour is charged hourly at a rate that depends on how soon you need the visit. The full cost of any repair is quoted and approved before we start, with parts and materials quoted separately. When you call, tell us the surface type — tarmac, concrete, block paving or gravel — roughly how old it is, how long the crack has been there and whether it changes after heavy rain or frost. Photos help us allocate the right amount of time.