top of page

What we do

Concrete

concrete34.jpg

Concrete Specialists

​

Quality concrete work can enhance the look, function, and value of your property.

 

We provide durable concrete solutions for driveways, patios, pathways, foundations, and more, delivering quality workmanship built to last. We also construct consented retaining walls and structural concrete work, ensuring all projects meet the required standards and regulations.

 

Whether it's a small residential project or a larger commercial job, we'll create a finished result that looks great and stands the test of time.

Concrete in Dunedin

 

Dunedin is a hill city. Most sections have a slope on them somewhere, a bank, or clay underneath — often all three. That makes concrete different here to concrete on flat, stable ground: what's under the slab decides how long it lasts, more than the concrete itself does.

 

We do the excavation and manage the pour ourselves — That matters more than it sounds, because most concrete problems aren't really concrete problems. They're prep problems: ground that wasn't dug out properly, a base that was never compacted, water that was never given anywhere to go. We control all of that, because we're the ones doing it.

What we pour

 

Driveways, paths and patios — plain or exposed aggregate, your call. New ones, or a tired, cracked driveway broken out and replaced.Pads — house pads, deck and spa pads, and any hardstanding where you need a flat, solid surface and don't have one yet.Shed and garage floors, and foundation prep for extensions and new builds — excavation, footings and a pad dug to plan, level and compacted, ready for the builder to take over.Steep sections, tight driveways and back sections you can't get a standard machine into are a lot of what we get called for. If someone else has looked at your job and not turned up, that's usually exactly the kind of job we mean.

Why the ground underneath decides whether it cracks

 

Concrete is only as good as what's underneath it. Pour a slab onto ground that hasn't been dug out properly, or onto a base that hasn't been compacted, and it doesn't matter how good the concrete itself is — it'll move, and then it'll crack.A lot of Dunedin sits on clay, and the hill suburbs carry a layer of loess — a fine, wind-blown silt that's completely normal for this city but has an awkward habit: firm when it's dry, soft when it's wet. Ground like that needs to be dug out to solid material and built back up properly with a compacted base course before anything gets poured on top of it. Skip that step, or rush it, and the slab is sitting on ground that can still move underneath it.Drainage matters just as much. Water with nowhere to go sits under a slab or against the edge of a driveway, and wet ground under concrete is soft ground under concrete. Where a job needs it, we grade falls and get water moving away from the slab instead of pooling against it.This is the part of the job nobody photographs. But it's the part that decides whether what you're looking at in five years still looks like the day it was poured.

Slope and a Dunedin winter

 

Sloped sections change how a driveway or a pad gets built. Falls have to be right so water runs where it's meant to, and on a real slope that often means more excavation into the bank, or building the low side up, before the forms even go in. A broomed or textured finish is usually the better call on a sloped driveway too, so it isn't slick when it's wet.Concrete and frost don't get on. If it freezes before a pour has had the chance to go off, that can weaken it for good. Saturated winter ground is the other issue — harder to get a stable, well-compacted base when the ground underneath it is holding water. None of that rules out a winter pour; plenty of them happen. But we'll tell you honestly if your timing or your ground means it's worth waiting a few weeks, the same as we would for a retaining wall.

Do you need a building consent

 

Usually not, for a standalone driveway, path or patio. The Building Act generally doesn't treat plain concrete flatwork as "building work" the way it treats a structure. It's a different question if there's a retaining element in the job — see our retaining walls page for that threshold, because concrete and retaining show up on the same site more often than not. It's also a different question if the concrete is part of a bigger consented build, like a new garage or an extension, in which case it sits under that consent rather than needing its own.If you're not sure which applies to your job, ask us when we come and look, or check with the council directly for your specific site.

What actually drives the price

 

Nobody can price concrete off a phone call. Here's what actually moves the number:

 

Access. The big one, same as any job. A truck that can reverse in and chute the concrete straight into place is a different job to one where it has to be barrowed, or carried, bucket by bucket. We take on plenty of sites other contractors won't, but access has to be priced honestly.

 

Excavation and prep depth. How much has to come out, how deep the base course needs to go, and what the ground actually turns out to be once we're into it.

 

Area and thickness. A driveway or a pad carrying vehicle weight needs to be thicker and better reinforced than a garden path.

 

Reinforcing. Mesh, and bar on some jobs, held up on chairs so it sits where it's meant to inside the pour, not resting uselessly on the ground.

 

Finish. Plain broom finish is the simplest and cheapest. Exposed aggregate costs more, but a lot of people prefer the look.

 

Falls and drainage. Getting water moving away from the slab properly, not just downhill in whatever direction happens to be lowest.

 

Where the spoil goes. Every excavation means something comes out of the ground, and it has to go somewhere. Tight sites with nowhere to stockpile mean more truck movements, and that's a cost line people forget until they see it.

Cracking: the honest bit

 

All concrete cracks eventually. Anyone who tells you otherwise is selling you something.

The real question isn't whether it'll ever crack — it's whether it cracks where it's supposed to, in a straight, controlled line, or because something underneath it moved.

That's what control joints are for — the straight lines cut or tooled into a slab. They're not decoration. They're there to make the concrete crack along that line instead of wherever it feels like, because concrete shrinks slightly as it cures and it has to give somewhere.A few fine hairline cracks inside a bay, running with the joint pattern, is normal concrete behaviour, not a defect. A wide crack, a crack that's stepped or offset, or cracking that shows up outside the joint pattern altogether, is usually telling you something moved underneath — which loops straight back to the ground prep. It's also exactly why we do the digging as well as the pour: the crew that got the base right is the crew that stands behind the slab on top of it.

The jobs other people turn down

 

We poured a job on Seaview Terrace where there was no truck run and no chute anywhere near the pour. Every bit of that concrete went up a flight of steps by hand, in buckets — for a spa pool. No pump, no shortcut, just the crew and the buckets.

That's not the easy way to pour concrete. It's also usually why we get the call — plenty of outfits either price themselves out of a job like that, or don't turn up to quote it at all. We have many many more examples of the difficult, successful jobs we've done, thats why all the 5 star reviews!

If your site is steep, narrow or awkward, and you've had people not show up to look at it, give us a call. We'll come and tell you honestly whether it can be done — and if it can, we've probably already done a version of it somewhere else in this city. 

What actually happens, start to finish

​

1. We come and look. Free, anywhere in Dunedin. We'll check access, look at the ground, and tell you what it needs.

2. You get a written quote. Valid for 7 days, and it's the price we charge.

3. Excavation and base prep. Dug out to solid ground, base course in and compacted.

4. Boxing and reinforcing. Formwork set to line and level, mesh — or bar, if the job needs it — placed and held at the right height.

5. The pour. Placed, screeded and finished — broom, trowel or exposed aggregate, depending on what we agreed.

6. Curing and joint cutting. Given time to go off properly before it's put to work, with control joints cut in.

7. We tidy up. Site left clean, nothing left behind.

Common questions

 

How long does a concrete job take? A straightforward driveway or pad on a site we can get a truck to is usually a matter of days, plus curing time before it's driven or walked on hard. Add difficult access, a big excavation or winter weather and it stretches. We'll give you a realistic timeframe when we quote, not an optimistic one.

 

Can you pour in winter? Yes, though frost and saturated ground can make it harder to get a good result, and some jobs are better waiting a few weeks. We'll tell you honestly if yours is one of them.

 

Will my concrete crack? Some cracking, in the control joints, is normal and expected — that's what the joints are there for. What shouldn't happen is a wide or stepped crack outside the joint pattern. Get the prep right and that's rare.

 

Do I need a building consent? Usually not for a standalone driveway, path or patio. It's a different answer if there's a retaining wall involved, or if the concrete is part of a bigger consented build. We'll tell you which applies when we look at your job.

 

Can you match existing concrete? Usually, for a similar finish and a similar age. An exact colour match on old, weathered concrete is harder to promise — concrete changes colour as it ages, and a new pour next to an old one will always look newer for a while.

 

Do you do small jobs — just a path, or a small patio? Yes. A path or a small patio is a real job and gets quoted like one.

  • Get a price on your concrete Free on-site quote, anywhere in Dunedin.

  • Send us a photo of the site to start with if that's easier — we can usually tell you a lot from one picture.

Transform your outdoor space

No job is too big or too small

© 2023 By Little Tonne Diggers

  • facebook
bottom of page