Reinforced Concrete
Concrete is strong under compression but weak under tension, so steel reinforcement is added to carry the loads plain concrete can't handle on its own. Reinforcement can be steel mesh for slabs and paths, or reinforcing bar for structural elements like footings, beams and retaining walls, and the right type and spacing depends on what the concrete needs to carry and the ground it sits on.
Pricing guide: How much does reinforcement add to the cost of concrete?
Standard SL72 mesh typically adds around $8 to $15 per square metre to a slab or path. Structural reinforcing bar for footings, beams or retaining walls costs more, depending on the bar size and spacing the engineer specifies.
Why homeowners choose it
- Adds tensile strength that plain concrete doesn't have
- Controls the width and location of cracking as concrete shrinks
- Allows slabs and footings to span soft or reactive ground safely
- Required by engineers for most structural concrete work
- Extends the working life of driveways, slabs and footings
How it works
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1
Assessing the load
The engineer or contractor determines what the concrete needs to carry, which sets the type and amount of reinforcement required.
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2
Selecting mesh or bar
Light-duty areas like paths typically use welded mesh, while structural elements use individually placed reinforcing bar.
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3
Cutting and placement
Reinforcement is cut to size, tied together, and positioned on bar chairs so it sits within the concrete rather than on the ground.
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4
Cover and spacing checks
Spacing and concrete cover are checked against the engineering specification before the pour, especially for footings and beams.
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5
Pouring around the steel
Concrete is placed and worked around the reinforcement so it fully encases the steel with no voids.
Hiring guide
Questions worth asking before you commit to a contractor.
Ask to see it, not just take their word for it. Insurance protects your property if something goes wrong on site.
Site preparation, disposal of old material, and any council permits can be included or charged separately — get it in writing before you compare quotes.
Some contractors do the work themselves; others subcontract parts of it. Neither is wrong, but you should know who is doing your job.
Old concrete, tree roots or drainage issues are common surprises. Ask how a change of scope gets costed before it happens, not after.
Materials usually carry a manufacturer's warranty. Ask specifically about the contractor's own workmanship warranty too.
Frequently asked questions
How much does reinforcement add to the cost of concrete?
Standard SL72 mesh typically adds around $8 to $15 per square metre to a slab or path. Structural reinforcing bar for footings, beams or retaining walls costs more, depending on the bar size and spacing the engineer specifies.
What's the difference between mesh and reinforcing bar?
Mesh is a pre-welded steel grid used mainly in slabs and paths for crack control. Reinforcing bar (rebar) is individual steel rod tied by hand into cages or grids, used where higher structural strength is needed.
Does every concrete slab need reinforcement?
Most residential slabs and driveways use at least mesh reinforcement, even where loads are light, because it helps control cracking as the concrete cures and moves over time.
Can reinforcement stop concrete from cracking altogether?
No. Reinforcement doesn't stop concrete from cracking, it controls where and how much it cracks, keeping any movement tight and structurally sound rather than random and unsightly.
Reinforced Concrete in popular suburbs
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