Permeable Concrete vs Traditional Concrete for Your Driveway

Water's the test. Not colour. Not price, not yet. Whether a driveway has to manage its own rain decides the choice between permeable concrete and a plain slab, more than anything else on the checklist.

Lean permeable when:

• The permit carries a stormwater or permeable-area condition.
• Water already pools at the garage, or runs toward the neighbour's side.
• An established tree sits close to the drive and its roots want air as well as water.

Lean traditional when:

• The block drains itself, no help needed.
• Nothing on the permit mentions stormwater.
• A trowelled, polished or stencilled finish outranks drainage on the wish list.

Strength first, because it surprises people

Permcon holds 25+ MPa, poured at 125 mm as standard: the same structural mix whether the job is a courtyard path or a car park. Thickness is the lever, not the recipe. A bin truck rolling up the drive every week just means a thicker pour, not a different one. Traditional concrete gets its crack control from joints instead. Permcon pours as one continuous surface, with nothing to rock, sink or spread.

Warranty

Ten years, structural, in writing. If a Permcon driveway fails structurally, APC assesses it, pulls up the area and replaces it. Terms and conditions apply, and we'll go through them before anything's signed. A traditional driveway's cover is whatever the concreter who poured it is willing to put in writing, so that conversation happens with them, not with us.

Drainage

Here's where the two surfaces stop behaving alike. A traditional slab sheds every drop to the kerb, a grate or a pit; on a sloping block in a heavy downpour, that means water sheeting past the garage door. Permcon lets the rain through instead, at 8,000 to 10,000 mm/hr, into a base of clean screenings that holds 37 to 42 litres per square metre at 85 per cent design capacity on a typical driveway profile. From there it soaks into the ground, or, where the soil is too tight for that, bleeds away through an under-drain. Fewer puddles. Less water leaving the block altogether.

Council permeable area

Ask what the permit actually says before picking a finish. A sealed driveway counts as impervious area, and on a tight block that can tip the site over its permeable-area cap, which drags in detention tanks and extra pipework to get signed off. Permeable concrete is treated as pervious area instead, where the designer and the council accept it. Clause 55 guidance in Victoria names driveways and paths directly as pervious contributors, and stormwater conditions there are now run through BlueFactor. Every other state has its own WSUD rules, working the same way: less sealed surface, less stormwater to manage.

Looks

Give this one to traditional concrete. Broom, trowel, exposed aggregate, stencil, polish, take whichever finish suits the house. Permcon's face is more open and textured, 7 mm stone in Victoria, 10 mm in the rest of the country, in plain grey, charcoal, soapstone or sandstone. It pours as one run, so there's no grid of saw cuts across the surface, just an even plane from the street. Ultracon trims that texture right down, using a 2 to 5 mm stone bound with a permeable resin, for a smoother, barefoot-friendly finish.

Maintenance

Traditional concrete more or less looks after itself, aside from staining under standing water. Permcon needs a monthly look: leaves and garden soil kept off it, water draining freely after rain. A sweep once a year. A wash if moss gets into the voids. Skip all that and the surface clogs. Stay on top of it and the pavement is built for a design life in excess of 30 years.

Cost

A deeper base changes the sum. Permeable driveways carry more base depth than a plain slab, so the two jobs price differently from the ground up, though that extra base can remove pits, pipes or a detention tank the permit would otherwise demand. See what actually drives a Permcon quote for the detail, and how the base and finish are built up for the rest. Prices aren't published, because no two driveways are.

A site visit settles it. That's where every quote starts.