Concrete Repairs & Replacement NZ

Concrete Services
  • New Zealand

Strong and reliable concrete slab construction

Cracked, uneven, sunken or damaged concrete can affect both the appearance and usability of your property.

Concrete Services Direct can help arrange quotes for concrete repairs and replacement throughout New Zealand, from small damaged areas through to complete driveway, patio, path and slab replacement.

  • Concrete crack repairs
  • Damaged and deteriorated concrete
  • Sunken or uneven concrete areas
  • Driveway, path and patio replacement
  • Concrete slab repairs and replacement
  • Removal of old concrete
  • New concrete installation
  • Residential and commercial projects
  • Free, no-obligation quotes

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Concrete Repair & Replacement for Homes and Businesses

Concrete is durable, but it can still become damaged over time.

Cracking, ground movement, poor drainage, tree roots, impact damage, wear and changes beneath the concrete can all affect the surface.

In some situations, concrete repair may be enough to restore the area. In others, removing the damaged concrete and installing new concrete can provide a better long-term solution.

The right approach depends on the cause and extent of the problem, not just what the damage looks like on the surface.

Whether you’re dealing with a cracked driveway, uneven pathway, deteriorated patio or damaged commercial slab, tell us about the issue and request a free, no-obligation quote.

Concrete Crack Repairs

Cracks are one of the most common issues people notice in concrete.

Not all cracks mean the concrete has failed.

Some cracking can occur naturally as concrete:

  • Shrinks while curing
  • Expands and contracts with temperature changes
  • Responds to minor ground movement
  • Ages over time

Other cracks can be a sign of more significant issues beneath the surface.

Before deciding on a repair, it is useful to consider:

  • How wide the crack is
  • Whether it is getting larger
  • Whether one side has moved
  • How long it has been present
  • Whether water is entering the crack
  • Whether similar cracks exist elsewhere

A small surface crack and a slab with substantial movement are very different problems.

When Should Cracked Concrete Be Repaired?

Repair may be suitable when the damage is localised and the surrounding concrete remains reasonably stable.

Potential repair situations can include:

  • Small isolated cracks
  • Minor surface damage
  • Localised edge damage
  • Small chips
  • Limited deterioration
  • Minor cosmetic defects

The repair method depends on the type of damage and the concrete surface.

It is important to understand that concrete repairs may remain visible, particularly on older, coloured or decorative concrete.

The goal of a repair may be structural, practical or cosmetic, and the expected result should be clear before work begins.

When Should Concrete Be Replaced?

Replacement may provide a better solution when the existing concrete has more widespread problems.

This can include:

  • Large areas of cracking
  • Multiple sunken sections
  • Significant movement
  • Severe surface deterioration
  • Poor drainage
  • Incorrect levels
  • Extensive tree-root damage
  • An unsuitable layout
  • Concrete that is too thin for its intended use
  • Major renovation work

Replacing concrete allows the area beneath it to be assessed and prepared again.

It also creates an opportunity to change the layout, improve drainage or select a different finish.

Concrete Driveway Repairs

Concrete driveways are exposed to regular vehicle loads, weather and movement.

Over time, problems can include:

  • Cracking
  • Settlement
  • Edge damage
  • Surface wear
  • Drainage issues
  • Broken sections
  • Movement around service trenches
  • Tree-root damage

A concrete driveway repair may be appropriate for smaller localised problems.

Where large sections have moved or deteriorated, replacing part or all of the driveway may provide a more practical result.

Concrete Driveway Replacement

An old driveway can sometimes reach the point where repeated patching no longer makes sense.

A concrete driveway replacement can involve:

  1. Breaking up the existing concrete
  2. Removing and disposing of the material
  3. Assessing the underlying ground
  4. Correcting levels or drainage
  5. Preparing and compacting a new base
  6. Installing reinforcing where required
  7. Pouring and finishing the new driveway

Replacement also allows you to change the:

  • Driveway width
  • Parking layout
  • Surface finish
  • Entrance design
  • Drainage
  • Connection to paths or garages

For properties undergoing renovation, the driveway can be redesigned to suit the updated layout rather than simply copying the old one.

Concrete Path Repairs

Paths can become cracked or uneven through:

  • Ground movement
  • Tree roots
  • Settlement
  • Water
  • Poor original preparation
  • Age

Small defects may be repairable, but raised or sunken sections can create trip hazards.

Where a pathway has substantial movement, replacing the affected section can provide a more practical and visually consistent solution.

Concrete Path Replacement

Replacing an old path also creates an opportunity to improve how the route works.

The new path can potentially be:

  • Wider
  • Straighter
  • Curved differently
  • Better drained
  • Connected to new outdoor areas
  • Finished in exposed aggregate or decorative concrete

If an existing path was damaged by tree roots or drainage problems, the underlying cause should be considered before the new concrete is installed.

Concrete Patio Repairs

Concrete patios can develop:

  • Cracking
  • Surface wear
  • Staining
  • Uneven areas
  • Edge damage
  • Settlement
  • Drainage problems

The best solution depends on how badly the patio is affected.

For an otherwise sound slab, a targeted repair may be enough.

If the patio has widespread movement or poor levels, replacement may provide an opportunity to improve both the concrete and the entire outdoor layout.

Concrete Patio Replacement

Patio replacement can be particularly worthwhile when the outdoor area no longer suits the home.

Removing the old surface allows you to reconsider:

  • Patio size
  • Shape
  • Levels
  • Drainage
  • Outdoor furniture layout
  • Connections to paths
  • Pergolas
  • Outdoor kitchens
  • Decorative finishes

A new patio can therefore be more than just a like-for-like replacement.

It can form part of a broader outdoor renovation.

Concrete Slab Repairs

Concrete slab damage can range from minor surface cracking to more serious structural movement.

Potential issues can include:

  • Cracks
  • Settlement
  • Spalling
  • Impact damage
  • Surface deterioration
  • Movement at joints
  • Heavy-load damage

The importance of the damage depends partly on what the slab is supporting.

A crack in a small outdoor pad is very different from movement in a structural building slab.

Where structural damage is suspected, further assessment may be required before repairs are carried out.

Concrete Slab Replacement

Some slabs become unsuitable because of:

  • Major cracking
  • Settlement
  • Inadequate thickness
  • Poor base preparation
  • New load requirements
  • Building renovations
  • Heavy equipment installation

Replacing the slab allows the new concrete to be designed around its future use.

This is especially important where vehicle loads, machinery or structural requirements have changed.

Concrete Garage Floor Repairs

Garage slabs can develop:

  • Cracks
  • Edge damage
  • Surface wear
  • Impact damage
  • Localised settlement
  • Damage around door thresholds

Minor repairs may help restore the surface.

More significant issues may require partial or complete replacement, particularly if the slab has moved or no longer works with the garage door or driveway levels.

Concrete Pool Surround Repairs

Pool surrounds are regularly exposed to water, movement and outdoor conditions.

Common issues include:

  • Cracking
  • Settlement
  • Damaged edges
  • Surface deterioration
  • Uneven joints
  • Poor drainage

Because pool areas are frequently wet, uneven concrete can be more than a visual problem.

Repairs should consider both the concrete condition and the surface safety and drainage of the surrounding area.

Concrete Retaining Wall Repairs

Concrete retaining walls can develop cracking, movement or deterioration.

Because retaining walls hold back soil, significant damage may be structural rather than purely cosmetic.

Potential warning signs include:

  • Large cracks
  • Bulging
  • Leaning
  • Separation
  • Drainage problems
  • Movement at the base

Where a retaining wall shows substantial movement, professional or engineering assessment may be required before deciding on the appropriate repair.

Surface Damage & Spalling

Spalling occurs when the surface of concrete breaks away, flakes or deteriorates.

This can be caused by several factors, including:

  • Moisture
  • Freeze-thaw exposure in some environments
  • Reinforcement corrosion
  • Impact damage
  • Poor surface quality
  • Chemical exposure
  • Age

Small surface areas may be repairable.

More widespread deterioration can indicate deeper issues and may require more extensive remediation or replacement.

Concrete Edge Repairs

Edges are often more vulnerable than the centre of a slab.

Driveways, paths and steps can develop:

  • Chipped corners
  • Broken edges
  • Crumbling sections
  • Impact damage

Small areas may sometimes be repaired, but heavily damaged edges can be difficult to restore invisibly.

If the damage affects vehicle access or creates a hazard, replacement of the affected section may be the better option.

Sunken Concrete

Concrete can sink when the material beneath it settles or washes away.

Potential causes can include:

  • Poor initial compaction
  • Leaking water
  • Drainage issues
  • Soil movement
  • Excavated service trenches
  • Erosion
  • Organic material decomposing beneath the slab

Sunken concrete can create:

  • Trip hazards
  • Water ponding
  • Poor drainage
  • Awkward vehicle transitions
  • Visible unevenness

Simply patching the surface may not address the underlying cause.

The support beneath the concrete needs to be considered.

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Uneven Concrete

Concrete may become uneven because one slab section moves differently from another.

This is common around:

  • Control joints
  • Paths
  • Driveways
  • Old extensions
  • Tree roots
  • Service trenches

The solution depends on the amount of movement and condition of the concrete.

Where sections have substantially shifted, removal and replacement may provide a cleaner result.

Tree Root Damage to Concrete

Tree roots can lift paths, driveways and other concrete surfaces as they grow.

This can lead to:

  • Cracks
  • Raised slab sections
  • Uneven surfaces
  • Broken edges

Before replacing the concrete, the root issue should be considered.

Simply pouring new concrete over the same problem may result in further movement later.

Tree work and concrete replacement may need to be coordinated depending on the situation.

Water & Drainage Damage

Poor drainage can contribute to concrete problems.

Water can:

  • Erode material beneath concrete
  • Enter cracks
  • Wash away base material
  • Cause ponding
  • Damage slab edges
  • Affect surrounding soil

Where drainage is contributing to concrete failure, the new work should address the water issue rather than simply replacing the damaged surface.

Correcting drainage before or during replacement can help reduce the risk of repeat problems.

Cracks Caused by Ground Movement

Ground movement can occur because of:

  • Soil settlement
  • Expansive soils
  • Fill material
  • Excavation
  • Tree roots
  • Water
  • Nearby construction

Minor movement may lead to relatively small cracks.

More substantial movement can cause entire slab sections to shift.

The cause of significant movement should be understood before a repair strategy is selected.

Concrete Repairs vs Replacement

One of the most common questions is whether damaged concrete should be repaired or replaced.

There is no single answer.

Repair may be appropriate when:

  • Damage is localised
  • The slab is stable
  • Levels remain acceptable
  • The surrounding concrete is in good condition
  • Appearance expectations are realistic

Replacement may be better when:

  • Damage is widespread
  • Multiple areas have moved
  • The slab is poorly drained
  • The underlying base has failed
  • Levels need changing
  • The concrete is badly deteriorated
  • The property is being renovated

The best decision considers cost, durability, appearance and the cause of the damage.

Partial Concrete Replacement

Not every replacement project requires removing an entire driveway or patio.

In some situations, only the affected section needs to be removed and replaced.

Partial replacement can be useful where:

  • One area has sunk
  • Concrete was damaged during other work
  • A utility trench crossed the slab
  • One section has severe cracking
  • The rest of the concrete remains sound

However, new concrete may not perfectly match the colour and appearance of existing concrete.

This is particularly noticeable with decorative or aged surfaces.

Full Concrete Replacement

Full replacement can create a more consistent finished result when the entire surface is deteriorated.

It may also be the better option where:

  • The layout needs changing
  • Drainage is poor
  • Multiple repairs already exist
  • Levels are incorrect
  • The finish is outdated
  • Extensive excavation is required anyway

While full replacement involves more work, it allows the project to be rebuilt from the base up.

Removing Existing Concrete

Concrete removal usually involves breaking the existing slab into manageable pieces before removing it from the site.

Depending on the project, equipment may include:

  • Concrete saws
  • Breakers
  • Excavators
  • Loaders
  • Wheelbarrows
  • Trucks

The method depends on:

  • Concrete thickness
  • Reinforcement
  • Site access
  • Area size
  • Nearby buildings
  • Existing services

Removal can represent a significant part of the project cost, especially on sites with restricted access.

Concrete Disposal

Old concrete needs to be removed and disposed of appropriately.

Depending on local facilities and material condition, concrete may sometimes be processed for reuse as aggregate or fill.

The quote should clarify whether concrete removal and disposal are included so there are no unexpected costs.

Preparing for Replacement Concrete

Once the old concrete is removed, the underlying area can be inspected.

Preparation may include:

  • Removing unsuitable material
  • Correcting levels
  • Filling low areas
  • Installing base course
  • Compacting
  • Improving drainage
  • Preparing edges
  • Installing new boxing
  • Adding reinforcement

This stage is important because replacing the concrete without fixing a failed base can lead to similar problems developing again.

Reinforcing Replacement Concrete

New concrete may include reinforcing mesh or steel depending on the application.

The appropriate reinforcing arrangement depends on:

  • Slab dimensions
  • Vehicle loads
  • Structural loads
  • Ground conditions
  • Concrete thickness
  • Project design

Replacement is an opportunity to reconsider whether the original concrete was suitable for how the area is actually being used.

Matching New Concrete to Existing Concrete

An exact match between new and existing concrete can be difficult.

Older concrete changes through:

  • Sunlight
  • Weather
  • Dirt
  • Wear
  • Sealers
  • Surface erosion

New concrete can therefore appear lighter, darker or simply different.

This is particularly noticeable with:

  • Exposed aggregate
  • Coloured concrete
  • Decorative finishes
  • Older plain concrete

Where appearance matters, it may be better to create a clear transition or replace a larger defined section rather than attempting an invisible patch.

Repairing Decorative Concrete

Decorative concrete can be more challenging to repair invisibly.

Differences may occur in:

  • Colour
  • Aggregate
  • Texture
  • Surface pattern
  • Sealer

A technically successful repair can still remain visually noticeable.

Before repairing decorative concrete, it is useful to decide whether the priority is structural improvement or visual consistency.

Repairing Exposed Aggregate Concrete

Exposed aggregate repairs can be particularly difficult to match because the appearance depends on:

  • Stone type
  • Stone size
  • Concrete colour
  • Exposure depth
  • Weathering

Small repairs may stand out from surrounding concrete.

For larger areas, replacement to a natural joint or defined boundary may provide a more consistent appearance.

Concrete Surface Resurfacing

In some situations, a concrete surface can be resurfaced rather than completely replaced.

Resurfacing involves applying a new surface system over existing concrete.

Whether this is suitable depends on the condition of the slab beneath it.

Resurfacing generally cannot correct major:

  • Settlement
  • Structural movement
  • Severe cracking
  • Base failure

The existing concrete needs to be reasonably stable for a surface treatment to perform effectively.

Concrete Levelling

Various methods can sometimes be used to address sunken concrete depending on the slab and cause of settlement.

However, not every slab is suitable for levelling.

The appropriate approach depends on:

  • Amount of settlement
  • Slab condition
  • Ground beneath the concrete
  • Access
  • Structural requirements

For badly damaged or fragmented concrete, replacement may be more practical.

Concrete Joint Repairs

Joints can deteriorate over time due to movement, traffic and weather.

Potential issues include:

  • Broken joint edges
  • Failed sealants
  • Dirt and water entering joints
  • Movement between slabs

Repairing joints can help protect slab edges and reduce water entry.

The appropriate treatment depends on whether the joint is designed to move or simply represents a crack.

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Concrete Repairs for Commercial Properties

Commercial concrete can experience higher levels of wear from:

  • Trucks
  • Forklifts
  • Machinery
  • Heavy foot traffic
  • Delivery vehicles
  • Equipment

Repair services may be required for:

  • Warehouse floors
  • Workshop floors
  • Concrete yards
  • Loading areas
  • Car parks
  • Accessways
  • Paths

Commercial repairs may also need to work around operational requirements to minimise disruption.

Commercial Concrete Replacement

Large commercial areas may need replacement when existing concrete can no longer support the intended use.

This may include:

  • Heavy vehicle areas
  • Industrial floors
  • Loading zones
  • Workshop slabs
  • Commercial yards

Replacement gives the opportunity to construct the new concrete around the current loads and operational requirements, which may be very different from when the original slab was built.

Repairing Concrete Trip Hazards

Uneven concrete can create trip hazards on:

  • Paths
  • Entrances
  • Commercial walkways
  • Courtyards
  • Pool areas

The appropriate solution depends on the height difference and cause.

Small irregularities may sometimes be treated locally, while larger movement can require slab replacement.

High-traffic or public areas should be addressed promptly where safety is a concern.

Concrete Repairs Before Selling a Property

Damaged concrete can affect the overall presentation of a home.

Before selling, homeowners may consider repairing or replacing:

  • Cracked paths
  • Broken entrance areas
  • Damaged driveway edges
  • Deteriorated patios
  • Uneven concrete

Whether replacement makes financial sense depends on the extent of the issue and the wider property.

Sometimes addressing a highly visible damaged area can significantly improve the first impression of the home.

Concrete Repairs During Renovations

Renovations often create an ideal opportunity to reconsider existing concrete.

Building work can change:

  • Door locations
  • Driveways
  • Patios
  • Paths
  • Drainage
  • Landscaping
  • Garage access

Rather than repairing concrete that no longer suits the property, replacement can allow the outdoor areas to be redesigned around the renovation.

How Much Do Concrete Repairs Cost?

Concrete repair pricing varies widely because the term “repair” covers many different types of work.

Factors can include:

  • Type of damage
  • Area affected
  • Crack size
  • Concrete thickness
  • Site access
  • Repair material
  • Surface finish
  • Preparation
  • Labour
  • Structural requirements

A small crack repair and a large sunken slab repair are completely different jobs.

The best way to determine cost is to provide photos and details of the actual problem.

How Much Does Concrete Replacement Cost?

Replacement costs depend on both removing the old concrete and installing the new surface.

Cost factors can include:

  • Area size
  • Concrete thickness
  • Reinforcement
  • Demolition
  • Disposal
  • Site access
  • Excavation
  • Base preparation
  • Drainage
  • Surface finish
  • Concrete pumping
  • Project location

Decorative concrete such as exposed aggregate may also cost more than basic finished concrete.

Is Concrete Repair Cheaper Than Replacement?

Usually, a small repair costs less than removing and replacing a large concrete area.

However, repeated repairs can become poor value if the underlying slab is continuing to move or deteriorate.

The cheapest short-term option is not always the best long-term solution.

It is worth comparing the likely durability and appearance of repair against replacement before deciding.

How Long Do Concrete Repairs Last?

The lifespan of a repair depends on:

  • Type of damage
  • Repair method
  • Existing concrete condition
  • Ground movement
  • Drainage
  • Loads
  • Ongoing maintenance

A repair addressing a stable localised defect may perform well.

A repair over an unresolved moving slab may fail again relatively quickly.

This is why understanding the cause of the damage matters.

Can Cracks Come Back After Repair?

Yes.

Repairing the visible crack does not necessarily stop future movement.

If the crack was caused by:

  • Ground settlement
  • Thermal movement
  • Structural movement
  • Drainage
  • Tree roots

then movement may continue.

Some repair systems are designed to accommodate movement better than others, but no repair should be assumed to permanently eliminate all future cracking.

Can Concrete Be Repaired in Winter?

Concrete repairs can often be carried out during cooler months, but temperature, rain and curing conditions can affect certain repair materials and new concrete.

The suitability of the work depends on the repair system and weather conditions.

Scheduling may therefore need to remain flexible during periods of poor weather.

How Long Before Repaired Concrete Can Be Used?

The required curing time depends on the repair material and application.

Some products gain usable strength relatively quickly, while structural or replacement concrete may need longer.

Follow the instructions provided for the repair before:

  • Walking on it
  • Driving on it
  • Loading it
  • Applying coatings

Using the area too early can damage the repair.

Can Concrete Be Repaired Without Removing It?

Yes, some damage can be repaired without removing the entire slab.

Potential methods depend on the problem and may include:

  • Crack filling
  • Patching
  • Surface repair
  • Joint repair
  • Localised replacement

However, where the concrete has substantially moved or the base has failed, surface repairs may not be enough.

Can Damaged Concrete Be Replaced in Sections?

Yes.

Partial replacement can often be carried out to natural joints or defined slab boundaries.

This may reduce cost compared with full replacement.

The trade-off is that the new area may not visually match the existing concrete exactly.

How Do I Know if My Concrete Is Structurally Damaged?

Signs that may justify further assessment include:

  • Large cracks
  • Significant level changes
  • Building movement
  • Bulging
  • Major settlement
  • Structural components separating
  • Rapidly worsening damage

Where the concrete forms part of a building foundation, retaining wall or other structural element, specialist assessment may be appropriate before repair work begins.

Concrete Repairs & Replacement Throughout New Zealand

Concrete Services Direct can help arrange concrete repair and replacement services across many parts of New Zealand.

Service areas include:

  • Northland
  • Auckland
  • Waikato
  • Gisborne
  • Bay of Plenty
  • Hawke’s Bay
  • Taranaki
  • Manawatu
  • Wairarapa
  • Wellington
  • Tasman
  • Marlborough
  • West Coast
  • North Canterbury
  • South Canterbury
  • Otago
  • Southland

Whether you’re dealing with a cracked driveway, uneven path, deteriorated patio or damaged commercial concrete, tell us what is happening and where the property is located.

Photos of the damage can be particularly helpful when making an initial enquiry.

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Frequently Asked Questions About Concrete Repairs

Can cracked concrete be repaired?

Yes, many concrete cracks can be repaired.

Whether repair is appropriate depends on the size, cause and amount of movement associated with the crack.

When should concrete be replaced instead of repaired?

Replacement may be better where there is widespread cracking, significant settlement, poor drainage, severe deterioration or failure of the underlying base.

Can an old concrete driveway be repaired?

Yes, depending on its condition.

Small areas of damage may be repairable, while driveways with substantial cracking or movement may be better replaced.

Can you replace part of a concrete driveway?

In many situations, yes.

A defined section can sometimes be removed and replaced without replacing the entire driveway.

The new concrete may not exactly match the older surface.

Why has my concrete sunk?

Common causes include poor base compaction, water erosion, soil settlement, service trenches and changes in the ground beneath the slab.

The cause should be considered before repairs are carried out.

Can tree roots crack concrete?

Yes.

Growing tree roots can lift or move paths, driveways and other concrete surfaces.

If roots caused the damage, the underlying issue needs to be considered before replacement.

Can exposed aggregate concrete be repaired?

Sometimes, but matching the original aggregate, colour and exposure can be difficult.

Repairs may remain visually noticeable.

Can concrete be resurfaced instead of replaced?

Some stable concrete surfaces may be suitable for resurfacing.

However, resurfacing generally won’t solve significant settlement, structural movement or failure underneath the slab.

How much do concrete repairs cost?

The cost depends on the type and extent of damage, repair method, access and surface finish.

Photos and measurements can help when requesting an initial quote.

Is concrete replacement expensive?

Replacement involves demolition, removal, preparation and new concrete installation, so cost depends heavily on the project size and site conditions.

A quote is the best way to establish the likely cost.

Can new concrete match old concrete?

An exact match is often difficult because older concrete changes colour and appearance over time.

Decorative concrete can be particularly challenging to match.

How long does a concrete repair take?

Timeframes vary from relatively small repairs through to multi-stage replacement projects.

Preparation and curing time can be just as important as the repair itself.

Can repairs stop concrete cracking again?

Not always.

If the underlying cause of movement remains, further cracking may occur.

The cause of significant damage should be considered before repair.

Do structural concrete cracks need an engineer?

Some do.

If cracks affect foundations, retaining walls or other structural elements, or there is significant movement, professional or engineering assessment may be appropriate.

How do I get a concrete repair quote?

Tell us where you’re located, what type of concrete is damaged and what problems you’re seeing.

Photos showing the affected area, cracks, movement and surrounding site can be very useful.

Get A Quote for Concrete Repairs or Replacement

Whether you have a cracked driveway, sunken pathway, damaged patio, deteriorated slab or concrete that simply needs replacing, Concrete Services Direct can help you get the quoting process started.

Tell us what has happened, where the concrete is located and whether you’re interested in repair, replacement or advice on the most suitable approach.

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