Pebblecrete (exposed aggregate concrete) and plain broom-finish concrete are the two most common original driveway materials across the Central Coast’s established suburbs. Both have been in wide use since the 1970s, and both age in different ways. If you’re building a new driveway, renovating an existing one, or deciding whether to resurface or replace, understanding the differences helps you make the right choice for your property and maintenance preferences.
Quick Answer (BLUF)
Pebblecrete has better initial slip resistance, more visual interest, and hides dirt more effectively than plain concrete. Plain broom-finish concrete is easier to clean, lower cost to install, and simpler to repair or resurface. Neither is definitively “better”, the right choice depends on your aesthetic preference, use, and maintenance tolerance. For most Central Coast homeowners, spray-on concrete overlay is now the most popular alternative to both.
What Is Pebblecrete?
Pebblecrete (also called exposed aggregate concrete) is plain concrete mixed with decorative stone aggregate, typically river pebbles, granite chips, or recycled glass, where the aggregate is exposed at the surface. This is achieved by washing or brushing the surface while the concrete is still partially wet, removing the cement paste from the surface to reveal the decorative stones beneath.
On the Central Coast, you’ll see pebblecrete in older Terrigal, Kincumber, and Gosford properties, most typically from the 1970s through to the early 2000s. The dominant colour palette in Central Coast pebblecrete is grey and brown river pebble, though some properties have reddish or pink aggregate.
Pebblecrete: Pros
Natural Slip Resistance
The protruding aggregate stones create a consistently textured surface that provides excellent grip when wet. A fresh pebblecrete driveway has a Pendulum Test Value (PTV) well above 36, the pedestrian zone minimum. This is why pebblecrete was so popular for pool surrounds and driveways: it’s naturally non-slip without any additives.
Hides Dirt and Staining
The textured surface and multi-tonal appearance of pebblecrete naturally hides dirt, tyre marks, and minor staining. A broom-finish plain grey concrete shows every mark; pebblecrete’s busy visual texture conceals most day-to-day grime.
Character and Visual Interest
In coastal settings, particularly Terrigal, Avoca Beach, and Kincumber, the natural stone texture of pebblecrete suits the beach house aesthetic well. Original pebblecrete in good condition has a character that plain concrete lacks.
Durability of the Aggregate
The aggregate stones themselves are extremely hard and durable. The stones don’t wear out, what wears in pebblecrete is the cement matrix holding the stones and the sealer protecting the surface.
Pebblecrete: Cons
Difficult to Clean
The textured surface traps dirt, leaves, sand, and organic matter between the stones. Pressure washing removes most of it, but deep in the gaps between aggregate it’s very hard to clean completely. This is particularly relevant in coastal settings where leaf litter and salt deposits accumulate.
Harder to Repair
Matching existing pebblecrete in colour, aggregate size, and exposure depth is very difficult. Patched areas almost always look different from the original. For driveways that need crack repair or partial replacement, this is a significant aesthetic drawback.
Sealer Degradation
The rough surface area of exposed aggregate is significantly larger than a smooth slab. More surface area means more sealer required, and sealer degrades faster because the UV exposure is higher on a rough surface. Pebblecrete driveways in the coastal environment need resealing every 2-4 years to maintain their appearance, shorter than plain concrete.
Ages to Look “Dated”
The 1980s and 90s pebblecrete aesthetic is now strongly associated with that era. Fresh pebblecrete is attractive; 25-year-old pebblecrete with faded sealer and worn surface looks dated in a way that plain concrete does less so.
Plain Concrete: Pros
Easy to Clean
A flat, smooth-ish surface (broom finish) is easy to pressure wash, sweep, and maintain. Oil stains are more visible but also easier to treat with degreaser than on rough aggregate.
Easy to Repair Seamlessly (Relatively)
Plain concrete patches are more forgiving than pebblecrete, colour variation will still be visible but blends more naturally over time, particularly if the driveway is resealed after repair.
Lower Cost to Install
Plain concrete poured and finished with a broom is cheaper than exposed aggregate, which requires more labour (aggregate timing during finishing is critical) and a more expensive mix with decorative aggregate.
Easier to Overlay
A plain smooth concrete slab is the ideal substrate for any overlay system, spray-on, stencil, epoxy. The minimal height variation means a thinner overlay achieves a perfect result.
Plain Concrete: Cons
Shows Dirt and Staining
Light grey broom finish is unforgiving of tyre marks, oil stains, rust, and general grime. In a working driveway, this means regular cleaning to maintain appearance.
Less Natural Slip Resistance
A broom finish that has worn smooth over the years provides very little slip resistance when wet. This is a safety concern on sloped driveways and entry paths.
Less Visual Character
Plain concrete can look utilitarian, particularly when aged to a chalky grey. While it can be transformed with overlay and colour, in its original state it’s less visually interesting.
Resurfacing: The Modern Alternative
For most new Central Coast driveway projects and resurfacing jobs, spray-on concrete overlay has largely replaced both plain broom-finish and pebblecrete as the preferred solution:
- Available in any colour
- Consistent, controlled texture
- Better UV and chemical resistance than either original format when correctly topcoated
- Able to be applied over either pebblecrete or plain concrete substrates
- Modern visual appeal without the dated associations of 1980s pebblecrete
If you’re making a decision about whether to replace, resurface, or maintain your existing driveway, read our guide on resurfacing vs replacing concrete for the financial and practical comparison.
FAQs
Can you tell pebblecrete and plain concrete apart from a distance?
Yes, pebblecrete has a visibly textured, multi-tonal surface from any reasonable distance. Plain broom finish concrete reads as a uniform light grey from a distance. Spray-on overlay typically reads similarly to plain concrete but with more colour depth.
My pebblecrete driveway is 30 years old, should I replace it or resurface it?
If the slab is structurally sound (no significant cracking or subsidence), resurfacing is almost always the better financial decision. A spray-on overlay over prepared pebblecrete completely changes the aesthetic at a fraction of replacement cost.
Is pebblecrete still being installed in new homes?
Pebblecrete is rarely specified for new driveways, it’s been largely supplanted by exposed aggregate concrete finishes and spray-on overlays. For pool surrounds, pebblecrete is still specified by some builders but is declining in favour of non-slip spray-on systems.
Which is better for a steep driveway, pebblecrete or plain concrete?
For a steep driveway, non-slip performance is the priority. Pebblecrete edges it over plain broom finish for natural slip resistance. However, a spray-on overlay with non-slip aggregate provides better controlled slip resistance than either and is the recommended choice for steep grades. See our guide on resurfacing steep driveways in Gosford hills.