The driveway is one of the most common block-paving jobs — and one where mistakes are made most often. For a surface that has to carry the weight of one or more cars for years, a good-looking block is not enough: thickness, sub-base and edge restraint matter at least as much.
How thick should driveway paving blocks be?
For car traffic, 60 mm thick paving blocks are the standard, safe choice. A 40 mm pedestrian block is not enough under a car, while 80 mm belongs to the heavy-vehicle category. Typical formats are 20×20×6 cm or the rectangular block (e.g. 20×10×6 cm), always concrete pavers conforming to UNE-EN 1338.
The sub-base decides everything
The build-up for a vehicle surface is thicker than for a footpath: excavation, compacted crushed-stone sub-base, often a cement-treated base for reinforcement, then the bedding layer and the blocks. Without proper compaction and without a kerb set on a concrete bed with a concrete haunch, the pavement sinks and spreads within a few years.
The driveway build-up in detail
Vehicle loading calls for a very different structure than a pedestrian path. From the bottom up, the layers are: after the topsoil is removed, a compacted crushed-stone (zahorra) sub-base follows, typically 20 cm thick, which spreads the load and drains water away. In many cases a cement-treated base (lean concrete) reinforcement goes on top, which prevents settlement under heavier loads. Then comes the roughly 4 cm bedding layer of fine grit, and finally the 60 mm blocks.
Compaction is mandatory for every layer, using a vibrating plate compactor. On a loose, uncompacted base even the finest paving sinks within a few years.
Why the edge restraint is decisive
Driveways most often fail at the edges. Without a proper kerb, laid on a concrete bed and reinforced with a concrete haunch, the edge of the paving creeps outwards under the car's load, the blocks loosen, and water undermines the structure. The kerb is not a decorative element — it is part of the pavement's load-bearing structure.
Which format and laying pattern to choose?
For vehicle surfaces, interlocking blocks are particularly recommended, because they cope well with the horizontal forces of braking, pulling away and turning. The classic rectangle (20×10×6) and the square (20×20×6) are both good choices. Grey is the most economical and practical; coloured or tumbled finishes carry a surcharge. A herringbone or staggered bond is not just attractive: interlocking blocks and herringbone distribute load better and resist horizontal forces better than simple row-by-row laying. On sloping or heavily used driveways these bonds add years to the pavement's life.
Driveway drainage
The driveway must fall towards the street or a gully, so water never runs towards the garage or the house. A drainage channel is often installed in front of the garage door to intercept run-off. In the province of Málaga this matters a great deal: the torrential autumn rains (DANA events) drop huge volumes of water in a short time, and a driveway without proper falls and a channel ends up flooding the garage.
A sloping driveway needs special attention
If the driveway slopes — for example, with the garage in the basement of the house — drainage is critical: a channel in front of the garage door must catch the run-off, otherwise the water flows straight in. On a ramp, the laying pattern and the kerb support matter even more, because vehicles put greater force into the surface when braking and pulling away.
How much does it cost and how long does it take?
A complete vehicle build-up runs at roughly €79.50–92/m² + VAT depending on the area (materials included). For an average single-car driveway (about 15–20 m²) the under-50 m² band applies; larger double driveways get a better unit rate. A single-car driveway is finished in a few working days, including curing and settling time. You can estimate the price with the calculator and see the detailed line items on the paving prices page.
A driveway almost always fails where the edge restraint is missing or the sub-base is too thin.
One car or two? The basis of sizing
The first question in driveway design is how many vehicles it must serve, and what movements: just parking, or also turning and reversing. One car generally needs 2.5–3 metres of width and 5–5.5 metres of length; two cars need 5–6 metres of width. Manoeuvring space increases the required area — and the build-up must carry that load too, because a turning wheel exerts sideways forces on the blocks.
Durability: what can you expect?
A professionally built driveway — with the right sub-base, kerbs and drainage — stays flat and stable for decades with minimal upkeep. The most common life-shortening factors are an uncompacted base, missing edge restraint and standing water. Get those right and block paving is practically maintenance-free, apart from topping up the jointing sand now and then.
Maintaining a trafficked surface
- Check the jointing sand once a year and top up whatever the rain has washed out.
- Watch the kerbs — have a loosened kerb re-fixed promptly.
- Clean oil stains as soon as possible (soaked-in oil is hard to remove).
- In the inland comarcas (Ronda, Antequera), where an occasional winter night can bring frost, avoid salting: salt damages concrete over time. Prefer mechanical cleaning and anti-slip grit.
The exact price is set after a site survey; get a quick estimate with the calculator and browse the line items on the paving prices page.
Electric cars and the driveway
More and more households run an electric car, which adds a new consideration to driveway design. If you plan to charge at home, it is worth laying the charger's cable in a protective duct before paving, during the groundworks phase. Doing it later means breaking up the finished paving — a needless cost. In a well-planned driveway, the charger's position and the cable route are decided in advance.
Permeable options for the driveway
A large sealed driveway collects a lot of rainwater. If you want to build with the environment in mind, choose permeable pavers or wider gravel-filled joints that let the water soak away on site. This eases the load on the drainage network and, in some municipalities, fits stormwater-management requirements better — a real advantage given the Costa del Sol's torrential downpours. With the right build-up, load capacity is still fully assured.
Aesthetics: house and driveway in harmony
The driveway is part of the house's street frontage, so it pays to match colour and pattern to the house, the fence and the garden. Restrained grey or earth tones age well; a contrasting kerb or border band gives an elegant frame. Large-format slabs create a modern look, small-format blocks a rustic one — the choice should follow the style of the house.
What to ask the contractor
When ordering a driveway, ask: how thick are the blocks (60 mm for cars), what is the sub-base (thickness of the crushed stone, whether there is a cement-treated base), how is the kerb built (concrete bed and haunch), and how is drainage handled. If you get specific, confident answers, you are in good hands. To book a free site survey anywhere in the province of Málaga, call +34 613 656 443.
Worked example: a double driveway
For a 36 m² two-car driveway, the full build-up (excavation, 20 cm crushed stone, 10 cm cement-treated base, bedding and 60 mm blocks) comes to about €92/m² in the 0–50 m² band, i.e. around €3,300 + VAT, plus the perimeter road kerb. On double driveways the unit rate can improve once you reach the 50 m² band. The exact figure is set with the calculator and the site survey.
Decision helper: which block for the driveway?
If load capacity is the main criterion, choose interlocking 60 mm blocks laid in herringbone. If looks matter too, large-format or multi-size combinations are striking but demand a perfect base. If budget rules, the classic grey rectangle is the most economical. In all three cases, 60 mm thickness and a proper sub-base are the starting condition.
A common driveway myth
Many people believe a thicker block solves everything. In reality, even an 80 mm block sinks on a weak, uncompacted base, while a 60 mm block on a good sub-base lasts for decades. Load capacity is the combination of sub-base, edge restraint and thickness — not a single element. So always ask for a quote that covers the full build-up, not just the blocks.
Summary
- For car traffic, 60 mm thick paving blocks are recommended.
- A vehicle build-up needs a thick crushed-stone layer and often a cement-treated base.
- The kerb is a structural element: without it the edge of the paving spreads.
- Interlocking blocks and herringbone bond resist sideways forces better.
- On sloping driveways, a drainage channel in front of the garage catches the run-off.
Key terms
Interlocking block: a shape that locks into its neighbours and shares the load between adjacent blocks.
Herringbone bond: a strong laying pattern that copes well with braking and acceleration forces.
Edge restraint (kerb): a frame set in a concrete bed and fixed with a concrete haunch, holding the pavement together.
Frequently asked questions
How thick should driveway paving blocks be?
For car traffic, 60 mm blocks are recommended, typically in 20×20×6 or 20×10×6 cm format.
Why does the edge of a driveway spread?
Most often because the edge restraint is missing or weak and the sub-base is too thin; without them the paving sinks within a few years.
How long does a driveway take to build?
An average single-car driveway is finished in a few working days, including curing and settling time.
Planning a driveway in the province of Málaga? After a free site survey we provide a detailed, no-obligation quote. Call us on +34 613 656 443, e-mail oficina@adoquin.eu, or work out a guide price with the calculator.
Planning a paving project?
Request a free site survey: we measure, advise, and within 1–2 working days you receive a detailed written quote.