Concrete Kerbing Cranbourne, Laid in One Continuous Line

Concrete kerbing gives a garden, driveway or car park a firm, permanent edge that holds its line for decades. In Cranbourne it is most often laid as continuous garden edging and flush mowing strips around lawns and beds, as edge kerbs along driveways and paths, and as barrier, semi-mountable and layback kerbs on car parks, commercial sites and private roads. Peak Concreting Cranbourne sets out every run on site, prepares and compacts the base to suit the ground, whether that is the Cranbourne sand belt, reactive clay or estate fill, and then slip-forms the kerb in one continuous line or hand-forms it where curves are tight. Joints are cut so any cracking stays straight and hidden, and the back of the kerb is haunched or backfilled so it cannot roll or creep. Work covers homes, townhouse developments and commercial sites across the City of Casey and Cardinia Shire, priced per lineal metre. Call 0485 032 128 for a free on-site measure and a written concrete kerbing quote.

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Peak Concreting Cranbourne

Concrete Kerbing Cranbourne: Garden Edging, Mowing Strips and Driveway Kerbs

Concrete kerbing in Cranbourne covers two quite different jobs that share the same material. The first is landscape work: a low concrete edge that separates lawn from garden bed, holds mulch, pebbles and soil in place, and lets a mower run straight along the boundary. The second is civil-style work: kerbs that guide traffic, hold the edge of an asphalt or concrete surface, collect and direct stormwater, and stop cars running onto gardens and footpaths. Both are priced per lineal metre and both depend on a well prepared base, but the profile, the mix and the amount of concrete in each metre are very different. Knowing which job is being asked of the kerb is the first decision on any quote, because a garden edge laid where a car will mount it will break, and a road kerb laid around a flower bed is wasted money.

Concrete garden edging around lawns and beds

Concrete garden edging is the most common kerbing job on Cranbourne homes. It is laid as one continuous band that follows the shape of the lawn and the beds, including sweeping curves that timber or steel cannot follow without joins. The edge usually stands slightly proud of the lawn on the bed side so that mulch and pebbles stay put, while the lawn side sits close to grass level. Because it is laid in place rather than built from pieces, there are no gaps for couch or kikuyu runners to creep through into the beds, which is the main complaint about cheaper edging in the newer estates where lawns are laid on imported topsoil over fill. A plain grey finish is standard, and a coloured finish can be matched to the house; the options for oxide colours are covered on the coloured concrete page.

Mowing strips laid flush with the lawn

A mowing strip is concrete edging set flush with the finished lawn, wide enough for one mower wheel to run along it. The blade then cuts the grass right to the edge, so there is no trimming against fences, walls, garden beds or the side of a path after every mow. Mowing strips are common along fence lines, under sheet metal fences where grass grows into the bottom rail, and around raised beds and water tanks. The width is chosen to suit the mower and the look of the yard, and the top is usually given a light broom or smooth trowelled finish so it is not slippery when wet. Getting the height right matters more than anything else: a strip that sits too high catches the mower deck, and one that sits too low lets the lawn grow over it within a season.

Driveway and path edge kerbs

A driveway or path edge kerb finishes the side of a hard surface and stops the edge crumbling where it meets soil or garden. On a concrete driveway the edge is normally formed as part of the slab, so a separate kerb is used where a driveway meets a garden bed, where pavers or gravel need restraining, or where a raised edge is wanted to stop cars dropping a wheel off the side. These kerbs carry more load than garden edging, so they are deeper, sit on a firmer base and may carry reinforcement where vehicles will run against them. Edges for new paths are usually set out with the path itself on the concrete paths and footpaths job, so the levels and falls match from the start.

Car park, commercial and private road kerbing

Car parks, shopping strips, warehouses, townhouse developments and private access roads need kerbs that separate traffic from landscaping and footpaths and guide stormwater to pits. This is where the full range of kerb profiles is used, from tall barrier kerbs at the edge of a car park to low edge strips beside the asphalt seal. Commercial kerbing is normally set out from a site plan with design levels, laid by slip-form machine in long runs, and coordinated with the asphalt or concrete paving crew so that the seal finishes neatly against the kerb. Body corporate and commercial owners also commission sections of replacement kerb where old kerbing has been cracked by trucks or lifted by tree roots.

Peak Concreting Cranbourne

How Concrete Kerbs Are Laid: Slip-Form Kerbing, Haunching and Joints

Concrete kerbs are laid in one of two ways: extruded in a continuous line by a slip-form kerb machine, or formed by hand with timber or steel formwork. Precast kerb units are a third option, set on a bed of concrete and haunched in place. Whichever method is used, the result depends on the same sequence: accurate set-out and levels, a firm and even base, a mix that suits the method, joints at the right spacing, and proper curing. Each step is simple on its own, but skipping one is the reason most failed kerbs fail.

Setting out levels and preparing the base

Every run starts with a string line or marked line on the ground and a set of levels that tell the crew how high the top of the kerb must finish. For garden edging the levels come from the lawn and the beds; for driveway and car park kerbs they come from the finished surface and the stormwater falls. The ground is then dug to the depth the profile needs, roots and soft spots are removed, and the base is compacted. On the sandy ground of the Cranbourne sand belt that compaction is the key step, because loose sand settles under the weight of a kerb. On reactive clay or estate fill the base is trimmed to firm ground and, for heavier kerbs, a compacted crushed rock layer is laid so the kerb does not sit directly on soft or wet clay.

Slip-form kerbing from a kerb machine

Slip-form kerbing, also called extruded or continuous kerbing, is laid by a kerb machine that pushes a stiff, low slump concrete mix through a steel mould shaped like the finished profile. The machine travels along the string line and leaves a fully formed kerb behind it with no formwork to set or strip. The mix has to be stiff enough to hold its shape the moment it leaves the mould, so it is batched with much less water than a slab mix. Slip-forming is fast on long, gentle runs, produces a very consistent profile, and gives a seamless line with no joins between units. It is the usual method for garden edging, mowing strips and most road and car park kerbs.

Hand-formed kerbs for tight curves and short runs

Some kerbs cannot be laid by machine. Tight radius curves, short sections between existing structures, kerb returns at the corner of a car park, and odd profiles that no mould matches are formed by hand. Formwork is set to line and level, the concrete is placed and compacted, and the face is trowelled or shaped with an edging tool. Hand-forming takes longer per metre than slip-forming, which is why short and fiddly runs cost more. It also suits repairs, where a new section has to match the profile and height of the kerb either side.

Haunching the back of the kerb

Haunching is the concrete placed against the back, and sometimes the front, of a kerb at its base. It locks the kerb into the ground so that it cannot rotate, slide or be pushed out by the paving, soil or vehicles against it. Precast kerbs always need haunching because each unit is otherwise just sitting on its bedding. Slip-formed kerbs are solid with their own base, but road and car park kerbs are still backfilled and compacted firmly behind, and on edges that restrain pavers or asphalt a haunch is often added. Skimping on haunching is a common cause of kerbs that lean outward after the first wet winter.

Contraction and expansion joints

Concrete shrinks as it dries, so a long kerb will crack on its own unless it is told where to crack. Contraction joints are cut or tooled into the kerb at regular, short intervals while the concrete is still green, so the shrinkage cracks form neatly in the joint rather than wandering across the face. Expansion joints, filled with a compressible strip, are placed where the kerb meets fixed structures such as pits, walls, driveways and existing concrete, so movement in one does not crack the other. On kerbs, joints are spaced much more closely than on a slab because the section is narrow and long.

Curing kerbs in hot, dry, windy weather

Cranbourne summers bring hot, dry and windy days, some over 40 degrees, and a narrow kerb loses moisture quickly because so much of its surface is exposed. Rapid drying causes plastic shrinkage cracking and a weak, dusty surface. On hot days kerbing is laid early in the morning, the finished kerb is kept damp or treated with a curing compound, and the run is protected from wind where possible. In the cool, wet winters the risk is the opposite: rain on fresh concrete and a soft, wet base, so laying is timed around the weather and the base is checked before the machine starts.

Peak Concreting Cranbourne

Kerbing Contractors in Cranbourne: Why Owners Choose Peak Concreting

Kerbing contractors in Cranbourne range from garden edging operators with a small machine to civil crews who lay road kerb and channel for estate developers. The difference that matters to an owner is whether the contractor sets out the job properly, prepares the base for the ground on that block, and quotes clearly. Peak Concreting lays residential garden edging, mowing strips and driveway kerbs, as well as car park and commercial kerbing, across the City of Casey and Cardinia Shire, and treats every run as a small civil job rather than a quick decoration.

Runs set out on site with the owner before any concrete is ordered

The line of a garden edge is a design decision, so it is marked out on the ground and walked with the owner before anything is dug. Curves are adjusted until they look right from the house and the street, mowing strip widths are checked against the mower, and the height of the edge is set against the lawn and beds. On commercial jobs the set-out follows the site plan and design levels. Changes cost nothing at this stage and a great deal once the concrete is down.

Clean joins to existing paths, driveways and kerbs

Most kerbing in established streets has to meet something that is already there: an existing driveway, a path, a council kerb, a tank pad or an older run of edging. A neat job finishes flush at these points, with an expansion joint where the new kerb meets old concrete and a matched height so there is no trip lip or mower snag. Where an old timber or plastic edge is being replaced, it is removed and taken away first, rather than being buried under the new kerb where it would rot and leave a void.

Written quotes that name the profile, length and finish

A kerbing quote should say what is being laid, not just a total. Each quote lists the profile, the measured length of each run, the finish and any colour, the base preparation, removal of old edging, joints and clean-up, so owners can compare quotes properly. If the site shows soft ground, tree roots or drainage problems, those are noted at the quote stage rather than found on the day.

Peak Concreting Cranbourne

Concrete Kerbing Cost Per Lineal Metre and What Drives the Rate

Concrete kerbing is priced per lineal metre, not per square metre, because it is a long, narrow run rather than an area. The rate for each metre covers the concrete, the base preparation, the machine or formwork, the labour to finish and joint the kerb, and the crew's time to set up on site. Because the set-up is the same whether the run is short or long, the per-metre rate falls as the total length rises. Exact rates can only be given after the run is measured on site, so this page gives the relative order and the factors that move the price rather than a figure.

How a per-metre kerbing price is built

A per-metre price starts with the volume of concrete in each metre of the chosen profile, then adds excavation, base material and compaction, the laying method, joints, curing, and the cost of getting the crew and machine to site. A minimum charge usually applies to very short runs because the set-up does not shrink with the job. Removal and disposal of old edging, tree root cutting and extra base work on soft ground are listed separately when they apply, so the quote shows what is driving the price.

Garden edging versus road and car park kerb pricing

A plain, flat mowing strip or simple garden edge is the lowest cost kerb per metre, because it uses little concrete, sits on a shallow base and is laid quickly by machine. Profiled and coloured garden edging sits a little above it. Driveway edge kerbs come next, as they are deeper and may be reinforced. Car park and road kerbs, such as barrier kerb and channel or semi-mountable kerbs, cost the most per metre because each metre holds far more concrete, needs a deeper, compacted base and a stronger mix, and must be laid to design levels for stormwater.

What pushes the rate up: curves, access, colour and short runs

Tight curves slow the machine or force hand-forming. Poor access, such as a backyard with no side gate wide enough for the machine or a barrow, adds labour. Colour adds the cost of oxide to the mix, and a stamped or decorative top adds finishing time. Short runs and many separate small sections cost more per metre than one long continuous run. Soft or wet ground, and any need to cut through roots or remove old edging, also add to the rate.

Peak Concreting Cranbourne

Slip-Formed Concrete Kerbs Versus Precast Kerbs and Other Edging

Concrete kerbing is not the only way to edge a garden, restrain paving or finish the side of a car park. The common alternatives are precast concrete kerbs, block paving kerbs, and timber, steel or plastic garden edging. Each has a place, and the right choice depends on the load the edge must carry, how long it needs to last, and whether the line is straight or curved.

Slip-formed versus precast concrete kerbs

Precast concrete kerbs are factory-made units, usually around one metre long, that are bedded on concrete and haunched in place. They give a sharp, consistent profile and suit short runs, repairs to existing precast lines, and places where a machine cannot work. Slip-formed kerbs are laid in place as one continuous piece with no joins between units, so there are fewer gaps for weeds and water, and on longer runs they are faster and usually cheaper per metre. Curves suit slip-forming, as precast units need special radius pieces or cut joints to go around a bend. For most garden edging and long car park runs, slip-forming is the better choice; precast is the better fit for short straight runs or when matching an existing precast line.

Concrete edging versus timber, steel and plastic edging

Timber edging is cheap to install but rots and warps in contact with damp soil and is attacked by termites, so it usually needs replacing within a few years. Plastic and rubber edging is easy to lay but lifts, kinks and is chewed by mowers and line trimmers. Steel edging gives a thin, modern line and follows gentle curves, but it can rust at joints and has a sharp top edge, and it does not double as a mowing strip. Concrete costs more to lay than any of these, but it is permanent, holds a line through hot summers and wet winters, stops grass runners, and takes a mower wheel.

Kerbs as edge restraints for pavers and block paving

Pavers and block paving rely on a firm edge to stop the outer row spreading and the joints opening up. A concrete kerb or a concrete haunch along the edge acts as that restraint. Block paving kerbs, made from paving units set on edge or laid on a concrete haunch, suit a paved driveway or courtyard visually, while a poured concrete kerb gives a stronger, continuous restraint. Either way, the restraint must be set on a solid base and haunched, or the paving moves with it.

Peak Concreting Cranbourne

Kerb Profiles: Barrier, Semi-Mountable, Mountable, Layback and Edge Strip

The profile is the cross-section shape of a kerb. Road and car park kerbs follow a family of standard profiles used by councils and civil designers, each suited to a different job: stopping vehicles, letting them cross, or simply finishing the edge of a seal. The same names appear on site plans and in council standard drawings, so it helps to know what each one is before reading a quote.

Barrier kerb and channel

A barrier kerb has a tall, near-vertical face designed to stop vehicles mounting it. It is used around car park edges, islands and along roads where cars must not drive onto the footpath or landscaping. Barrier kerb is usually laid with a channel, a shallow concrete gutter at its base that carries stormwater along to a pit. Because of its height and the channel, it holds the most concrete per metre of any common profile.

Semi-mountable and mountable kerbs

A semi-mountable kerb has a sloped face and a lower height, so a vehicle can mount it slowly if it needs to, while still defining the edge clearly. It is the usual kerb in residential estates and on private access roads in townhouse developments. A mountable kerb is lower and flatter again, designed to be driven over easily, and is used where vehicles regularly cross the edge, such as some estate streets and access lanes.

Layback kerbs at a vehicle crossing

A layback kerb is the dipped section of kerb at a driveway entrance, where the full kerb profile is lowered so a car can roll from the road onto the vehicle crossing. Laybacks are formed when a new crossing is built or when an existing kerb is cut out and replaced with a layback section. Work in the road reserve needs council consent, and the consent and crossover process is set out on the concrete driveways page rather than repeated here.

Edge strip kerbs along road and car park seal

An edge strip is a flat or near-flat concrete strip laid along the edge of an asphalt or concrete seal. It does not stop vehicles, but it holds the edge of the seal so it does not crumble, gives a clean line, and can carry stormwater where it is shaped as a shallow channel. Edge strips are common along private roads, rural-residential driveways and the edges of car parks that drain to a grassed swale.

Dwarf wall kerbs and pin kerbs

A dwarf wall kerb has a raised upstand that acts as a low retaining edge, holding garden soil or landscaping above the level of a car park or path. It suits planting strips and garden islands where the soil sits higher than the pavement. A pin kerb is a narrow, low kerb used mainly as an edge restraint to paving or a garden bed, where a full road kerb would be too bulky. Taller retaining edges that hold back real soil load are retaining walls rather than kerbs and are designed differently.

Peak Concreting Cranbourne

Why Kerbs and Edging Crack, Lift or Sink, and How It Is Prevented

A well laid kerb lasts for decades, but kerbs and edging do fail. They crack across the face, lift at one end, sink into soft ground, or lean outward. Almost every failure traces back to the ground under the kerb, the joints, or what has been put next to it. Most of these causes can be prevented at the laying stage, and older kerbs that have already failed can be cut out and replaced in sections through concrete repairs rather than replacing the whole run.

Loose sand that was never compacted

Much of Cranbourne sits on the sand belt, and sand has low reactivity, which is good for concrete. The risk is that loose sand compacts later under the weight of the kerb or under traffic, so the kerb settles unevenly and cracks at its weakest point. The fix is simple but often skipped: dig to firm ground, compact the sand in layers, and moisten it so it compacts properly before the kerb is laid.

Reactive clay and estate fill movement

Away from the sand belt, most of the corridor sits on reactive clay that shrinks in dry summers and swells in wet winters. Many newer estates are built on cut-and-fill, and poorly compacted fill settles for years. A narrow kerb on moving ground lifts and drops in sections, which shows as steps at joints and cracks across the face. Trimming to firm ground, a compacted crushed rock base for heavier kerbs, closely spaced joints and good drainage away from the kerb keep that movement from showing.

Tree roots and garden irrigation

Tree roots grow under kerbs and edging looking for moisture and lift them as they thicken. Planting large trees close to a new kerb, or laying a kerb across established roots, invites lifting within a few years. Where roots must be crossed they are cut cleanly back before the base is prepared, and a root barrier can be used where the tree stays. Garden irrigation that soaks the base of a kerb day after day softens the ground beneath it, especially on clay, so drippers and sprays are set to water the beds rather than the edging.

Vehicles mounting or clipping the kerb

Garden edging and light edge kerbs are not built to take the weight of a car, trailer or delivery truck. When a vehicle cuts a corner over a garden edge, the kerb cracks or is pushed out of line. Where vehicles will run against or over an edge, a deeper, reinforced kerb on a compacted base is used, or the profile is changed to a mountable or semi-mountable kerb that is designed to be crossed.

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The Process

3 Step Process For Your Concrete Kerbs & Edging Needs

1. Free On-Site Assessment and Quote

Every job starts at the property. The area is measured, the existing concrete or bare ground is checked for movement, drainage and access, and the finish and budget are talked through on site. A fixed, itemised written quote follows, listing the preparation, the concrete or overlay system, the finish and the sealer, with any variation agreed in writing before work starts. There is no pressure and no obligation. Call 0485 032 128 to book an assessment.

2. Preparation, Then the Pour or Overlay

Once the quote is agreed, the site is prepared for the ground it sits on. For new concrete that means excavation, a compacted base, formwork, reinforcement and control joints set out to suit sandy Cranbourne soil, reactive clay or engineered fill. For repairs and resurfacing it means cleaning, grinding and fixing cracks before anything new goes down. The concrete or overlay is then placed and finished, with the timing set around heat, wind and rain.

3. Curing, Clean-Up and Handover

New concrete and overlays are cured before they carry any real load, which is what gives them their strength and limits surface cracking. Formwork is removed, the site is cleaned, and the handover covers when the surface can be walked on, driven on and washed, and how and when it should be resealed.

Concrete Kerbs & Edging in Cranbourne

FREQUENTLY ASKED QUESTIONS

Everything you need to know about our Concrete Kerbs & Edging in Cranbourne

How much does concrete kerbing cost per metre?

Concrete kerbing is priced per lineal metre, and the rate depends mostly on the profile. A plain mowing strip or simple garden edge is the lowest cost per metre, profiled and coloured edging sits a little higher, and barrier or semi-mountable road and car park kerbs cost the most because each metre holds far more concrete and needs a deeper base. Short runs, tight curves, poor access and removal of old edging all raise the rate. An exact figure needs the run measured on site, and the written quote lists each of these items.

Is it a concrete kerb or curb?

In Australian and British English the word is kerb, meaning the concrete edge along a road, car park, driveway or garden. Curb with a u is the American spelling of the same word. Council drawings, civil plans and trade quotes in Victoria all use kerb and kerbing, so kerb is the spelling to use when searching for or describing the work locally.

What is a concrete kerb called?

A concrete kerb goes by different names depending on its job and shape. In gardens it is usually called concrete edging, garden edging, a mowing strip or a mowing edge. On roads and car parks the names describe the profile, such as barrier kerb, kerb and channel, semi-mountable kerb, mountable kerb, layback kerb, edge strip and dwarf wall kerb. Kerbs laid by machine are also called slip-formed, extruded or continuous kerbing.

How long before a new kerb can be mowed against or driven over?

Concrete keeps gaining strength for weeks after it is laid. Foot traffic and light mowing beside a new garden edge are usually fine after a few days, as long as the mower wheel does not knock the fresh edge. Vehicle loads on driveway and car park kerbs should wait until the concrete has cured, which is generally at least seven days, and longer in cold weather. The crew gives a specific time on the day based on the mix and the weather.

Can concrete edging follow curved garden beds?

Yes. Slip-formed concrete edging follows gentle and sweeping curves in one continuous line with no joins, which is one of its main advantages over timber, steel and precast units. Very tight curves are hand-formed instead. The line is marked out on the ground and adjusted with the owner before any concrete is laid, so the curves look right from the house and the street.

Should old kerbing or edging be repaired or replaced?

It depends on how much of the run has failed and why. A few cracked or lifted sections can be cut out and replaced to match the profile either side, while edging that has failed along its whole length, or old timber and plastic edging, is better removed and replaced with a new continuous kerb. The cause, such as tree roots, soft ground or vehicles mounting the edge, is fixed at the same time so the new kerb does not fail the same way. Peak Concreting inspects the run and quotes both options where both are sensible.