A finished concrete garage floor looking out through the open roller door in Launceston
Garages & Sheds

Concrete Shed and Garage Slabs in Launceston

A shed slab looks like the simplest job on this site, and across Launceston it and it is the one people most often get wrong. Everything comes back to one question we ask first: what is actually going to stand on it?

Free Measure & Quote
Tell us what you need and we'll have a look.

How We Work

Measured and Quoted on Site

Not off a photo. We come out, look at the ground and the access, and price the actual job.

The Ground Gets Done Before the Concrete Does

Excavation, a compacted base and reinforcement to spec, the half that decides how long it lasts.

One Price, and We Take the Mess with Us

One written price for the whole job, not a rate per square metre, and the site is left clean.

The First Question

What Is Going to Stand On It?

Thickness, steel and edges all come off this one answer, and it costs nothing to get right at the quote. Read across.

What goes on itSlabReinforcementWatch for
Garden shed, mower, tools100mmMesh on chairsAnchor bolts, and a fall out the door
Single garage, one car100mm, thickened edgesMesh on chairsThe edge where the wheels cross the threshold
Workshop, benches, a hoist125mm or moreHeavier mesh, bar where the hoist boltsHoist positions before the pour, not after
Caravan, boat, trailer125mm or moreHeavier mesh throughoutPoint loads from jockey wheels and stands

Every one of those is a different slab and they all look identical once the shed is up. If you tell us a hoist is coming in two years, we will build for it now, because adding it later means breaking out concrete. A slab for a dwelling is a different thing again, that is designed to a site classification and is covered on the concrete slabs page.

Before the Concrete Is Ordered

Decided Before the Concrete Is Ordered

None of these can be added once the slab has gone off, and every one of them is cheap to include on the day. This is the whole of the thinking.

A shed slab boxed up ready to pour, with mesh on chairs, anchor bolts set and conduit standing through it
Every decision on this list, in one frame, on the morning of the pour. Formwork to the line, mesh up on chairs, bolts held to the shed plan, conduit through, and the edge trench dug deeper around the perimeter.

The Shed Plan, and the Bolts off It

Shed frames bolt down to the slab, and the bolt positions come off the manufacturer's plan, which is why we want it before we pour. Different makers set their frames differently. Cast in wet the bolts are exact; drilled later they are a repair.

Slab Size, Setbacks and Permits

Some sheds sit flush to the slab edge, others need it to run past the frame, and the plan tells us which. Boundary setbacks, maximum floor area and whether a permit is needed all decide where the slab can go, so confirm them before concrete is ordered.

A Fall Out Through the Door

The slab falls away from the opening so water runs out rather than in. A flat shed slab collects every bit of rain that blows through.

Thickened Edges Where Wheels Cross

The threshold is where a garage slab breaks first, because it is the edge and it is where the load is. It gets thickened.

Conduit and Services

Power, water and any floor waste set before the pour. Cutting a trench through a finished slab is a bad day and a visible repair.

The Apron, and the Next Thing

A metre or two in front of the opening so you are not stepping onto mud. Poured with the slab it is a small addition; poured later it is a separate mobilisation. Same for a hoist, a bigger door or a bench along one wall: if it is likely, build for it now.

What We Pour

Sheds, Garages, Workshops and Hardstand

The same trade, four different specifications, decided by what stands on the concrete.

Colorbond shed pads, a concrete shed slab in Launceston

Colorbond Shed Pads

The most common job. Bolts to the shed manufacturer's plan, a fall to the door, and an apron so you are not stepping into grass.

Garage floors, a concrete shed slab in Launceston

Garage Floors

Power floated flat and jointed. It is a floor you will look at every day, so it is finished like one.

The threshold and apron, a concrete shed slab in Launceston

The Threshold and Apron

Where the garage floor meets the driveway. The most-loaded edge on the whole slab and the one most often left thin.

Caravan and boat hardstand, a concrete shed slab in Launceston

Caravan and Boat Hardstand

Heavier again, because jockey wheels and stands are point loads on a small area.

Thickened edges, a concrete shed slab in Launceston

Thickened Edges

Deeper around the perimeter and anywhere wheels cross. This is where a slab that takes vehicles differs from one that does not.

Cast-in fixings, a concrete shed slab in Launceston

Cast-in Fixings

Bolts, and anything else that has to be in the concrete rather than drilled into it later.

How It Happens

From Set Out to Bolted Down

A shed slab is usually a two or three day job on site, and it happens in the same order every time.

A shed slab being power floated, with the formwork still boxed and the anchor bolts set around the edge
Boxed, bolted and being floated. The bolts were set to the shed plan before the concrete arrived, which is the whole of the difference.
01

Set Out to the Shed Plan

Position, size, levels and falls. We work from the shed plan for the bolt centres and from the site for everything else.

02

Excavate and Compact

Out to depth and crushed rock compacted in layers. Sheds get built on the cheap here more than anywhere, and it is where a slab starts to move.

03

Box, Reinforce and Set Bolts

Formwork to the line and the fall, mesh up on chairs, thickened edges formed, and the anchor bolts positioned to the plan.

04

Pour, Float and Level

Placed, screeded and power floated. A garage floor gets finished properly because you will be looking at it, not covering it.

05

Cut, Cure and Hand Over

Control joints cut early, the slab cured rather than left to dry fast, and the site cleaned up ready for the shed to go on.

The Ones We Get Called About

What It Costs to Get Those Wrong

These are the four faults we are called out to look at, and each one traces back to a decision made before the concrete went off.

Water Running in the Door

The slab was poured flat or falling the wrong way. It cannot be fixed afterwards without grinding or a threshold strip, and neither is a good outcome.

The Edge Breaking Away

A thin unthickened edge where the wheels cross. Once it starts it works inward and the repair is a saw cut and a new section.

Cracking Across the Middle

No joints cut, or cut too late. Concrete moves, and on a shed slab it is easy to decide where, a saw cut costs almost nothing.

Settlement at One Corner

The base was raked rather than compacted, or fill was covered instead of removed. This is the expensive one and it is entirely preventable.
What It Depends On

What Changes the Price of a Shed or Garage Slab

Our rates are on the decorative concrete page. A shed slab has fewer variables than a house slab, and these are the ones that matter.

A concreter measuring out a back yard with a tape and string line before a shed slab is priced
Hardstand for a caravan is a different slab from a garden shed pad, and it is decided at the quote.

What Is Going on It

The first question and the biggest one. A garden shed pad and a workshop floor with a hoist are different thicknesses and different steel.

Pad Size and Footprint

Square metres set the bulk, and a simple rectangle is efficient. Cutting around an existing structure costs more per metre.

The Ground and the Levels

A flat firm spot is straightforward. A sloping corner of the yard means cut and fill, and possibly a low retaining edge, which is separate work.

Getting Concrete to the Back Yard

Chuted straight off the truck is one price. Barrowed through a side gate or pumped over the house is another.

The Apron and Any Extras

Concrete in front of the door, a path joining it to the house, or a wider hardstand for a trailer. Cheap now, separate jobs later.

Whether It Needs Engineering

Most small sheds do not. Anything a permit covers, or anything on fill or reactive ground, does, and we will tell you which yours is.

Before You Ring

Work Out Your Shed or Garage Slab in Square Metres

Most people already know their shed size, which makes this the easy one. Put in the two numbers off the shed order and you have the slab area.

Shed or garage size

Straight off the shed order

Area 
Concrete, roughly 

Based on a 100mm slab with thickened edges. Heavier again if a hoist or a tractor is going on it. A starting point, not a quote.

Have those two numbers when you ring, and tell us what is going on it. A garden shed, a workshop with a hoist and a caravan are three different slabs on the same footprint.

Call Us Now

The Next Step

Get a Price for Your Shed or Garage Slab

Send the shed size, the make if you have ordered one, and what is going inside it. That last answer changes the slab more than the first two.

Free Measure & Quote
Tell us what you need and we'll have a look.

What Happens After You Send It

  • We come out and measure it, free, and look at the ground and the access.
  • You get one written price for the whole job, not a rate per square metre.
  • If you go ahead, you get a start date and the same crew from quote to pour.

Would rather talk it through? (03) 6724 3698, or send the details through the contact page.

Common Questions

Shed Slab Questions We Get Asked in Launceston

How thick should a shed slab be?

A hundred millimetres with mesh on chairs suits a garden shed, a mower and tools. A garage takes the same with thickened edges where the wheels cross the threshold. A workshop with a hoist, or hardstand for a caravan or boat, wants a hundred and twenty five or more with heavier steel. Tell us what is going on it before we quote.

Do I need the shed plan before you pour?

Yes, ideally. The anchor bolt positions come off the shed manufacturer's plan, and different makers set their frames differently. With the plan we cast the bolts in exactly; without it, they get drilled and chemically anchored afterwards, which works but is a recovery rather than the design.

Does a shed slab need to fall to the door?

Yes. A slab poured dead flat collects any rain that blows through the opening and holds it. A slight fall out through the door means water leaves on its own. It cannot be corrected afterwards without grinding, so it is decided at set out.

Do I need council approval for a shed slab?

It depends on the size of the shed, the setbacks from your boundaries and your council. Small garden sheds usually do not; anything substantial usually does. Worth confirming before concrete is ordered, because the slab position may be affected.

Can you pour a slab for a shed I've already bought?

Yes, and it is very common. Send us the plan with it, that is what gives us the bolt centres and the exact slab dimensions. If the shed is already delivered, even better, because we can check the frame against the plan.

Should I add an apron in front of the door?

Almost everyone wants one eventually, so it is worth doing with the slab. A metre or two of concrete in front of the opening means you are not stepping into mud, and it gives the mower and the wheelbarrow somewhere to run. Poured later it is a separate job with its own mobilisation.

Free Measure, Fixed Price

Find Out What Your Job Costs

One call and we come out, measure the real thing and put a price in writing. It costs nothing and there is no salesman in it.

One call. We measure it and put a fixed price in writing. Costs nothing.

(03) 6724 3698 Ask for a free measure
  • We come and measure itOn site, tape out, so the price is for your job and not a guess off a photo.
  • A fixed written priceOne number you can hold us to. Not a range, not a rate, not an estimate.
  • The crew who quotes it pours itThe bloke standing in your driveway is the bloke who does the work. Who you are dealing with.
  • Measured on site, not guessed
  • Fixed written price, not a range
  • The crew who quotes it pours it

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