Replacement of cracked pavers comes 18 months after completion of an upgrade in George St and the surrounding retail area.
However, Dunedin City Council central city plan project director Glen Hazelton said there was no problem with the product and damage was limited to localised areas.
The St Andrew St intersection with George St was one significant area affected, and it was also where large trenches had previously been dug for underground pipes and where there had since been heavy traffic, he said.
Some pavers had not settled evenly.
There was also an issue around a few service covers.
Underground pipes or infrastructure had not been damaged.
Dr Hazelton said the areas requiring replacement added up to 115sqm, which was 0.5% of the pavers for the overall project.
Remedial work involved replacing damaged road and footpath pavers in and around George, Albany and St Andrew Sts.
The council has a supply of spare pavers.
Dr Hazelton said repairs were mostly cosmetic and minor.
Such repairs were normal for projects of this scale, he said.
Dr Hazelton said the work was happening within the defects liability period and the council waited until after winter to carry it out because this helped with drying time for the mortar.
Most of the work would be done at night and in sections to minimise disruption to businesses and road users, the council said.
Work would stop before December.
In January, the crew would return to fix some pavers in the Knox Row part of George St, the council said.
Cr Lee Vandervis said a new set of pavers in George St should last for many years and should not need to be replaced so quickly.
The council had also not made clear who would pay for the paver replacement work, he said.
The upgrade of the retail area had a capital cost of about $110million, which included replacing old pipes underground.
George St was the focus of a makeover above ground, which included one-way traffic for three blocks and a more pedestrian-friendly environment.
"The once-in-a-generation revamp of the city centre resulted in a beautiful streetscape that many people are enjoying," Dr Hazelton said.
"Unfortunately, some aren’t being as kind, and we are still having some issues with vandalism of the trees, in particular.
"We ask that residents be more respectful so others can continue to appreciate the central city area."
The revamp has won awards.
A trio of companies known as the Ō3 Collective — Jasmax, Aecom and Isaac Construction — was recognised at the South Island Property Awards last year for revitalising the city’s main street and delivering a people-centric, high-value destination.
This came shortly after the Aecom consultancy won a silver award at the New Zealand Association of Consulting and Engineering Awards.
Contractors started repair work on Sunday night at the intersection of George and St Andrew Sts.
After St Andrew St, contractors would move on to the Golden Centre block of George St and then the New Edinburgh Way block.
The work resulted in some traffic congestion yesterday evening.
A damaged tree in the New Edinburgh Way block would also be replaced, the council said.
There would be some temporary lane closures and reduced parking in some areas while the roadworks were under way.
