My Driveway Is Cracking. Does It Need Replacing or Just Repairing?

Not all cracks mean your driveway needs to come out. Small hairline cracks in the surface are common and can often be sealed to stop water getting in and making things worse. If the crack is narrow, the edges are level with each other, and the surrounding concrete feels solid underfoot, repair is usually the right call.

The situation changes when cracks are wide, when one edge sits higher than the other, or when the concrete moves or feels hollow when you walk on it. These signs point to a problem underneath the surface, not just on top of it. In that case, patching the crack will not fix the underlying cause and the damage will return.

In Christchurch, ground movement from the 2010 and 2011 earthquakes shifted sub-base conditions across many suburbs. Some driveways that look like they have a surface cracking problem are actually sitting on a compromised base. Filling the crack on top does not solve that. A contractor can check whether the base is sound before recommending repair or replacement.

A good rule of thumb: if the cracking is isolated to one area, repair is worth trying first. If cracks run across most of the driveway, sections are sinking, or the surface has crumbled rather than cracked cleanly, replacement is the better long-term investment.

Get a free assessment from a Christchurch Concrete driveway specialist: concrete driveway repair in Christchurch