Shed, garage and farm building slabs around Wonthaggi

From backyard garages to farm sheds

We pour slabs for single garages and carports in town, double garages with workshops behind new homes, boat and caravan sheds for beach houses, and big machinery and hay sheds on farms around Dalyston, Grantville and the Powlett River. Every slab is built to the shed supplier's engineering, which sets thickness, reinforcement, edge beams and footing sizes.

Set-out and square

A shed slab has to be square, level and exactly the right size, because the frame bolts straight onto it. We set out from the plans, check diagonals, and place hold-down bolts or cast-in plates where required.

Ground and base

Clay paddocks and sandy blocks both need a firm, compacted base. On farms we often build up the pad so the slab sits above the surrounding ground and water runs away.

Aprons and approaches

A concrete apron in front of roller doors stops mud and sand being tracked inside and gives a firm surface for vehicles and machinery. We can also pour approaches and turning areas.

Finishes inside

Steel-trowelled finishes suit garages and workshops; broom finishes suit wash bays and aprons.

Planning a shed slab

Before quoting, we look at the shed plans and engineering, the location, the ground, access for the concrete truck and pump, and where water will flow. On farms, sheds are often sited on a slope or in a paddock that is soft in winter. Choosing the right spot and building up a level pad makes a big difference to how the slab performs.

Engineering and footings

Shed engineering specifies slab thickness, reinforcement, edge beams and the size and depth of footings under columns. Wind loads on the Bass Coast are significant, so hold-down details matter. We set out footings precisely so they line up with the frame.

Garages for new homes

Attached garages are usually part of the house slab, but detached garages and carports are separate. We match levels to the driveway so there is no lip or step at the door, and we set falls so water does not enter.

Workshops

Workshops benefit from a smooth, dense steel-trowelled finish that is easy to sweep and roll equipment across. Conduits for power and floor wastes for sinks can be cast in. Epoxy or polyurethane coatings can be added later for oil resistance.

Boat and caravan sheds

Coastal homeowners often need a tall shed for a boat or caravan. Slabs need to carry concentrated loads from jockey wheels and trailer axles, and the apron must allow the vehicle to be reversed in easily.

Farm and machinery sheds

Machinery sheds carry tractors, trucks and equipment. Slabs are thicker, more heavily reinforced and often larger than residential slabs. Hay sheds may only need a partial slab, or footings with a rock floor. We help you work out what you need.

Dairy and wash-down areas

Wash-down areas need grippy finishes, falls to drains and sumps, and durable concrete that resists water, manure and cleaning chemicals.

Stables and animal shelters

Stable floors need grip for hooves and falls for drainage. We can include drainage channels and thickened areas for walls.

Tank pads and pump sheds

Water tanks need level, well-compacted pads sized for their full weight. Pump sheds can be poured at the same time.

Weather

Large slabs on exposed farm sites need careful curing in wind. We plan pours for suitable days and protect the surface afterward.

Permits

Larger sheds generally need a building permit, and rural land may have planning requirements. The shed supplier or a building surveyor will advise. We work to the approved plans.

Pour day and after

Big slabs may need a pump and several trucks. After the pour, the shed builder can usually start erecting within a few days, once the concrete has gained enough strength.

Choosing the size of slab

Many owners pour a slab exactly the size of the shed, while others extend it to create a covered verandah area, a lean-to or a wash bay. It is worth thinking about how you will use the shed in five or ten years. Adding concrete later is possible but rarely as neat or as economical as doing it in one pour.

Floor drains and falls inside sheds

Most garage floors are flat or have a slight fall to the door. Wash bays, dairy areas and workshops that get hosed out need falls to a floor drain or a channel. These must be planned before the pour, with the plumber placing pipes and a pit at the correct height.

Rebates for roller doors

Roller doors and sectional doors often need a small rebate or set-down in the slab so water does not blow under the door. On exposed coastal sites, where rain is driven sideways by wind, this detail is worth including.

Shed slabs on sandy blocks

On sandy coastal blocks, a shed slab must have its edges protected from scour, especially on the downhill side and where roof water from the shed is discharged. Connecting the shed's downpipes to a tank or a stormwater point stops the edge being undermined.

Shed slabs on clay

On clay, the base is built up with compacted rock, the area around the slab is graded to shed water, and footings are taken to the depth the engineer requires. Clay that is wet in winter can make access difficult, so we may recommend timing the job for drier months or building a temporary access track for trucks.

Accessing remote farm sites

Large shed slabs in paddocks need concrete trucks to drive in, sometimes over long distances of soft ground. We look at access during the quote visit and plan for temporary tracks, pumps or line pumps where needed, so the trucks are not bogged on pour day.

After the shed goes up

Once the shed is erected, aprons and approaches can be poured if they were not part of the first stage. Gutters and downpipes should be connected promptly so roof water does not damage new concrete or the ground beside it.

Garage slabs for holiday homes

Beach houses often need a lock-up garage or a carport where boats, kayaks, surfboards and bikes can be stored. A steel-trowelled slab with a slight fall to the door keeps sand and water out, and a sealed surface makes it easy to hose out salt and sand after summer.

Granny flat and studio slabs

Detached studios, home offices and granny flats are increasingly common on Bass Coast blocks. They need engineered slabs, plumbing and often a path or driveway connection to the main house. We pour the slab and the connecting concrete together where possible.

Carports

Carport slabs are typically lighter than garage slabs but still need proper footings for posts. In windy coastal locations, carport posts must be held down securely, so footing sizes and anchor bolts follow the engineering.

Machinery access and doorways

Wide doorways for tractors and trucks put concentrated loads on the slab edge. Edge beams and thickening at doorways stop the slab breaking where wheels cross.

Questions we ask before quoting a shed slab

What size and type of shed? Who is supplying it, and do you have the engineering? What will be stored? Will vehicles or machinery drive in? Do you need floor drains, conduits or set-downs? How will trucks get to the site? Is there a building permit? Knowing these answers lets us quote accurately.

Concrete for horse and hobby farm buildings

Lifestyle properties around the district often combine a few horses or cattle with a home business or hobby. Tack rooms, feed sheds, float bays and small workshops all benefit from a solid floor that keeps rodents, damp and mud at bay. We can pour several small slabs in one visit, with consistent levels and a connecting path or hardstand so you can move between them in wet weather without boots sinking into the paddock.

Keeping the shed slab dry long term

A slab that sits slightly higher than the ground around it, with the surrounding soil graded away and gutters connected, will stay dry inside for its whole life. A slab that sits in a hollow will collect water at the door every winter. We set heights with that in mind, even on flat paddocks.

Build specification at a glance

Bass Coast ground, weather and council rules

Wonthaggi sits where the coastal dunes of the Bunurong coast meet the clay country rising toward the Strzelecki foothills. Near the beaches at Cape Paterson, Inverloch and Kilcunda the ground is often pale sand that drains fast but moves if it is not confined and compacted. Inland, around North Wonthaggi, Dalyston and the farms, heavy clay swells in a wet winter and cracks open in a dry February. Parts of the old coal-mining town also carry fill, ash and brick rubble from a century of building. Add salt spray, sea mist and strong south-westerly winds, and concrete here needs a properly designed base, the right mix and careful curing. Each job gets a test hole, and the base is designed around the layers it shows.

Driveways, paths and patios within your own boundary usually need no permit. Any new or altered crossover across the nature strip, footpath or kerb needs a vehicle-crossing permit from Bass Coast Shire Council, which covers Wonthaggi, Inverloch, Phillip Island, San Remo and every town we work in. Accesses onto the Bass Highway or other main roads also involve the state road authority. House slabs, larger sheds and some coastal works need a building surveyor and engineering. We spell out whatever applies in your quote.

What a Wonthaggi Concreting quote shows

Our quotes are broken into the parts of the job rather than a single total. You will see the measured area, demolition and tip fees for any old concrete, pavers or gravel, how deep we excavate, the rock base specification and compaction method, slab thickness and reinforcement, the surface finish or pebble blend, the joint plan, drains and stormwater connections, edges and steps, sealing, and the council vehicle-crossing permit where one is needed. If a concrete pump, a long wheelbarrow run, traffic control on the Bass Highway or protection for a neighbour's driveway is required, it is listed on its own line.

This site deliberately carries no square-metre pricing. On the Bass Coast the same size driveway can sit on clean dune sand in Cape Paterson, wet grey clay in North Wonthaggi or old mine fill in South Dudley, and each needs different groundwork. A price published online would be wrong for most readers, so we prefer to look at your block and quote what it actually needs.