Concrete Resurfacing Hamilton

At Hamilton Concrete Contractors we resurface concrete across Hamilton and the Waikato, on driveways, paths, patios, pool surrounds and garage floors. Resurfacing lays a new wearing surface over concrete that is still structurally sound, so a slab that looks tired but sits level does not have to come out. We apply plain and broom finished toppings, coloured systems and stencilled patterns over existing concrete. It is the middle option between living with a surface and taking the whole slab out.

The slab underneath decides whether resurfacing is possible at all. We check that the panels still sit level with each other, that the ground below has stopped moving, and how deep the sound concrete starts, because an overlay is only ever as good as the concrete it is bonded to. Where the answer is no we say so before you have paid for anything. We measure the area, test what is under it and put the price in writing.

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Tell us the area and the age of the slab, and whether it has cracked, stepped or just worn. A photo taken along the surface at a low angle shows us more than one taken from above.

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Resurfacing Work

Concrete Resurfacing We Take On

Six kinds of resurfacing cover almost everything we quote. Driveways bring in the most work and coloured overlays carry the most visible change, so those two lead. All of it runs alongside the wider concreting we handle around the Waikato.

Driveway Resurfacing

Driveways are the surface most people ask us to resurface, usually because the top has worn open and the aggregate is showing through in the wheel tracks.

A new wearing course goes over the old slab once the surface has been ground back and the bond is proven. It works because the structure is already there and doing its job. The question we settle first is whether the tracks are wear or the start of the slab breaking down.

Coloured and Stencilled Overlays

Colour and pattern are what most of our resurfacing customers are actually buying, since a stencilled or coloured overlay changes how an area looks completely without touching the slab.

The system goes down over prepared concrete and takes its pattern before it sets. Existing control joints still have to be carried through to the new surface, because the slab underneath will keep moving at those joints whatever we put on top of it.

Patio and Pool Surround Resurfacing

Around patios and pool surrounds we resurface more for texture than for looks, because a smooth trowelled slab beside water is the one surface people actually slip on.

A textured topping gives grip back without lifting the finished level much, which matters where the surface has to stay below a cladding line or a door threshold. We check that clearance before quoting, since a topping adds height a paved surface may not have to give.

Garage and Workshop Floor Resurfacing

Garage and workshop floors come to us when the surface is dusting, staining or has broken up under a jack, and the concrete beneath is usually still perfectly sound.

A hard wearing topping over a prepared floor takes tyres, tools and point loads, and it stops the dusting that gets through everything in the garage. Oil in the existing slab has to come out before anything bonds, so degreasing is a real part of the preparation here.

Path and Step Resurfacing

Paths and steps we resurface where the concrete is sound but the finish has worn smooth, and on steps that is a safety job rather than a cosmetic one.

Worn step nosings and a polished path surface both get slippery in a Waikato winter. A textured overlay restores the grip. On steps the nosing edge has to be rebuilt square rather than feathered, because a thin edge over a nose breaks away the first time somebody catches it.

Grinding, Acid Etch and Surface Preparation

Preparation is the part of resurfacing we charge for and the part that decides whether the job lasts, so it is worth understanding what it involves.

The existing surface is ground or acid etched to open the pores and remove laitance, contaminants and any weak skin. Cement bloom and efflorescence come off in the same pass. Nothing bonds to a sealed, dusty or oily surface, and no topping product on the market fixes bad preparation.

Bond and Preparation

How We Resurface an Existing Concrete Slab

Five stages, and the first two decide whether the other three are worth doing.

Slab Assessment and Sound Concrete Depth

We check whether panels sit level with each other, whether cracks are still moving, and how deep the sound concrete starts under any weak surface layer. That last one decides how much has to be ground off.

Written Quote and System Selection

The quote names the system, the preparation method and the finished thickness. It also names what the overlay will not fix, so nothing about the result is a surprise.

Grinding, Cleaning and Crack Treatment

The surface is ground or etched to remove laitance and open the pores. Cracks are treated on their own merits first, because an untreated crack in the slab will come through the topping.

Primer and Topping Application

Primer goes on to the prepared surface and the topping is applied to the specified thickness, with edges terminated square square against a saw cut at full thickness.

Joint Reinstatement, Cure and Seal

Every existing control joint is carried through the new surface, the overlay is cured, and a sealer goes on where the system calls for one.

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Concrete Resurfacing Prices in Hamilton

Concrete resurfacing in Hamilton runs $40 to $80 per square metre, and where a job sits in that band comes down to how much preparation the existing slab needs and which system goes over it. A plain wearing course sits at the bottom. Coloured and stencilled systems sit at the top.

On a 50 square metre area that puts a typical resurfacing job between $2,000 and $4,000. For comparison, taking the same slab out and pouring new concrete runs $120 to $180 per square metre including break-out and removal, which is the number worth having in front of you when the slab is borderline.

Treat these as guide figures for August 2026 rather than a quote. We assess the slab on site, confirm the system with you, and the price comes back in writing.

Resurfacing work	Guide range (Aug 2026)
Concrete resurfacing, plain wearing course	$40 to $80 / m²
Typical 50 m² area resurfaced	$2,000 to $4,000
Full replacement instead, including break-out	$120 to $180 / m²

What Moves the Price of a Resurfacing Job

Condition of the existing slab. The biggest variable by a distance. A sound, clean, level slab needs a grind and a topping. A contaminated or partly broken down surface needs a great deal more removed before anything can bond.

Preparation method. Diamond grinding, shot blasting and acid etching are different plant, different hours and different amounts of waste to deal with.

System chosen. A plain wearing course, a coloured overlay and a stencilled pattern are three different products with three different application processes.

Crack treatment. Cracks have to be dealt with before the topping goes on, and how many there are is only fully visible once the surface has been ground.

Contamination. Oil, grease, moss, old sealer and paint all have to come out. Garage and workshop floors are usually the worst for this.

Joint reinstatement. Every existing joint is carried through the new surface. More panels means more joint work.

Area and shape. Open runs go quicker per square metre than areas cut into steps, edges and narrow returns.

Finished level. Where a topping cannot raise the surface, against a cladding line or a door threshold, more has to be ground off first.

How We Work

What Decides Whether an Overlay Holds

Six things that decide whether an overlay is still bonded in ten years, and none of them are the product.

We Test the Slab Before Quoting the Topping

We assess the slab before we price the topping. Panels that sit level, cracks that have stopped moving, and sound concrete close to the surface are the three conditions that make resurfacing worth doing. Where they are not met, an overlay is a cosmetic delay on a structural problem.

Existing Joints Carried Through the Overlay

The slab underneath keeps moving at its joints regardless of what goes over the top. Every existing control joint is carried through the new surface in the same position, because an overlay run continuously across a joint will crack along it within a season.

Square Edges Rather Than Feathered Ones

Overlays fail at their edges first. A topping run out thin to nothing has almost no strength at the feather, and it lifts as soon as a wheel or a shovel catches it. We terminate against a saw cut so the edge finishes at full thickness.

Preparation Is Most of the Work

Most of the hours on a resurfacing job go in before any new material arrives. Grinding, etching, degreasing and crack treatment are the work. A topping laid over an unprepared surface bonds to the laitance rather than to the concrete, and takes it with it when it goes.

A Moving Slab Is Not a Resurfacing Job

Where a slab has stepped at the joints or dropped at one end, the ground under it has moved. Resurfacing that slab covers the symptom and leaves the cause exactly where it was. We quote a repair or a replacement for those, and explain why.

We Tell You What an Overlay Will Not Hide

An overlay changes the surface. The shape stays as it was. It will not fix a fall that ponds water, it will not raise a slab that has sunk, and it will not straighten a level that was set wrong. We say which of those apply to your area at the site visit.

Bond and Ground

What Has to Be True Before Concrete Can Be Resurfaced

Resurfacing is the best value job on this site when the conditions are right, and a waste of money when they are not. Three things have to be true.

The first is that the slab is structurally sound. Concrete that is carrying its load, sitting level and no longer moving is a base worth building on. Concrete that has stepped at the joints has moved underneath, and no topping is going to hold across ground that is still settling.

The second is bond, and bond is entirely about preparation. Fresh concrete leaves a layer of laitance at the surface, a weak film of fine material that everything else sits on. Add years of sealer, moss, oil and traffic polish and there is a surface no product will stick to. Grinding or acid etching removes that layer and opens the pores so the primer and topping key into sound concrete. A white powdery bloom on an older slab is efflorescence, salts brought to the surface by moisture, and Concrete New Zealand describes removing it by stiff brushing or by dilute hydrochloric acid at one part in ten, noting that acid treatment takes a thin layer of concrete with it. That is a preparation step.

The third is joints. The slab beneath has control joints, and it will keep moving at them. Every one has to be carried through to the new surface in the same place, or the overlay cracks along the line of the joint it was laid across.

Hamilton ground is what makes the first condition worth checking properly. Council geotechnical work sets out the Hinuera Formation under Hamilton as interbedded coarse alluvium, pumice gravels, peat and silts, and notes it is highly variable in both directions. A slab spanning a change in that material can be perfectly sound at one end and settling at the other. The Waipa District grew 10.2 per cent between the 2018 and 2023 censuses, and a good deal of the concrete now due for resurfacing went in on platforms built during that run of growth.

Reviews

Google Reviews From Hamilton Concrete Customers

Reviews left by our customers on Google, pulled live from the profile.

EXCELLENT

Based on 10 reviews

Amit Sharma

My driveway was cracked all over and needed replacement as it was very old and worn off. I called Hamilton Concrete Contractors for a quote and consultation. Olly came over the next day to have a look and suggested the solution that best suited to my driveway's condition. I really liked the friendly vibes from Olly and he sounded like he genuinly cared. I got 3 more quotes from other companies but they were very transactional in my opinion. I liked Olly's approach and vibe so decidied to go ahead with him. He did an exceptional job for me and I am happy with the service.

kritika arora

We had an outstanding experience with Hamilton Concrete Contractors. The team was professional, punctual, and highly skilled. They handled our concrete project from start to finish with great precision, ensuring a smooth and durable finish. Their attention to detail and quality workmanship was excellent, and they kept the site clean and safe throughout the process. Communication was clear and consistent, and all our questions were answered promptly. We are extremely happy with the results and highly recommend Hamilton Concrete Contractors for any residential or commercial concrete work in Hamilton.

Seyi Oluokun

Tested and trusted. They have proven that they are reliable for any construction project. Highly recommended to all and sundry.

abah boniface

They are absolutely reliable, they kept to the agreement and they delivered the job smoothly

Damilola Oscar (J Hanameel)

One of the best at this. I am very excited to work with them. You can trust them too, I strongly recommend!

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Before You Overlay

Concrete Resurfacing FAQs

What people ask when they are weighing an overlay against a full replacement.

What does concrete resurfacing cost in Hamilton?

$40 to $80 per square metre, which puts a 50 square metre area between $2,000 and $4,000. Preparation and the system chosen decide where you land. A plain wearing course over a clean sound slab sits at the bottom of the band and a coloured or stencilled overlay sits at the top. For comparison, replacing the same slab runs $120 to $180 per square metre with break-out included. Guide ranges, and the price comes back in writing once we have seen the slab.

Can my driveway be resurfaced, or does it need replacing?

Three things decide it. Whether the panels still sit level with each other, whether the cracks have stopped moving, and how deep the sound concrete starts under any weak surface. Meet all three and resurfacing is the right call. A slab that has stepped at a joint has moved underneath, and an overlay over that leaves the cause in the ground. We check all three on site and give you both numbers when it is close.

How thick is a concrete overlay?

Thin, and that is the point. A resurfacing system adds a thin wearing course, so the finished level barely changes. That matters where the surface has to stay below a cladding line, a door threshold or a step nosing. Where the level cannot rise at all, more of the existing surface is ground off first to make room. We measure the available clearance before quoting.

Will the cracks come back through the new surface?

Any crack that is still moving will, and so will every existing control joint. That is why joints are cut through the new surface in the same positions rather than covered over. Cracks are treated on their own merits before the topping goes on, and a crack over ground that is still settling is a reason not to resurface at all. An overlay laid across a live crack shows it again within a season.

Why does preparation cost so much of the job?

Because it is the job. Concrete carries a weak layer of laitance at the surface, and older slabs add sealer, moss, oil and polish on top of that. Nothing bonds to any of it. Grinding or acid etching takes that layer off and opens the pores so the primer keys into sound concrete. A topping over an unprepared slab bonds to the contamination instead and lifts with it. No product on the market compensates for skipping this.

Can you resurface a garage or workshop floor?

Yes, and it is one of the better applications, because the concrete underneath is usually sound and the problem is dusting or staining at the surface. Oil and grease have to be removed before anything will bond, so degreasing is a real part of the preparation on these floors. A hard wearing topping then takes tyres, tools and point loads, and stops the dust that otherwise gets through everything stored in there.

What is the white powder on my concrete?

Efflorescence. Salts dissolved by moisture in the slab and carried to the surface, where the water evaporates and leaves them behind. Concrete New Zealand describes removing it by stiff brushing or with dilute hydrochloric acid at one part in ten, and notes that the acid treatment removes a thin layer of concrete along with it. It is not a defect and it is not a reason to avoid resurfacing. It is a preparation step.

How long before I can use a resurfaced area?

It depends on the system and the weather, and the product cure governs it, and that differs between systems. As a general position we keep foot traffic off until the topping has hardened and vehicles off considerably longer, and any sealer needs its own cure on top of that. We give you the actual times for the system going down on your job at the quote, because they differ between products and they differ in a Hamilton winter.

Free Resurfacing Quotes

Get a Free Concrete Resurfacing Quote

Tell us the rough size of the area and the finish you are after. We come out, measure it and send the price in writing. Call 07 808 6940.