Pebblecrete was the pool surround material of choice through much of the 1970s, 1980s and into the early 1990s in NSW. If you own an older home in Port Stephens — particularly in Nelson Bay, Salamander Bay or Corlette where residential development was active in that era — there’s a good chance your pool surround is pebblecrete.
It was a popular choice for good reasons: the pebble surface provides inherent non-slip texture, it was relatively inexpensive to install, and it had a natural, earthy look that suited the properties of the time. But after 30–40 years of coastal Port Stephens conditions, most pebblecrete surrounds are showing their age — and the decision of what to do with them is a common question.
What Happens to Pebblecrete Over Time in Port Stephens
Cement binder erosion: Pebblecrete is an aggregate (pebbles) held in a cement binder. Over decades, the cement binder wears away — partly from chemical attack (chlorine, salt), partly from UV, and partly from simple mechanical weathering (rain, freeze-thaw). As the binder erodes, the pebbles are left increasingly exposed and proud of the surface. Eventually, pebbles begin to loosen and can be dislodged.
Sharp exposed edges: As the cement erodes around pebble edges, the edges of the pebbles become sharper and more prominent. Old pebblecrete that originally had a rounded, smooth feel underfoot becomes rough and uncomfortable — particularly for barefoot use around a pool. This is probably the most common complaint Port Stephens homeowners make about old pebblecrete.
Salt acceleration: Port Stephens’s coastal environment accelerates this process. Salt particles work into the cement binder matrix (the same mechanism as in ordinary concrete), driving crystallisation pressure that breaks down the binder faster than in inland environments.
Staining: Old pebblecrete accumulates staining from pool chemicals, organic material (leaf tannins, algae), and iron staining from any steel reinforcement near the surface as oxidation products wick through. The stone aggregate in pebblecrete is often very porous and absorbs these stains deeply.
Non-slip degradation: New pebblecrete provides good grip from its aggregate texture. As the binder erodes and pebble surfaces are polished by foot traffic and chemical exposure over decades, the non-slip character degrades. Very old pebblecrete can become significantly less grippy than its appearance suggests.
When to Resurface Pebblecrete
Pebblecrete resurfacing is appropriate when:
The pebblecrete is rough but structurally sound. The binder has eroded to a point where the surface is uncomfortable, stained and cosmetically poor — but the pebbles are still mostly in place and the overall surface is still intact. This is the most common situation for 20–30-year-old Port Stephens pebblecrete.
The surface is slippery or non-slip is a concern. A new spray-on overlay with non-slip aggregate finish restores proper slip resistance in compliance with AS 4663:2013.
The pool surround has aesthetic issues. Staining, rough texture, and the dated look of old pebblecrete are all addressed by resurfacing.
Cost is a consideration. Pebblecrete replacement is significantly more expensive than resurfacing — removing old pebblecrete, disposing of the material, potentially reforming the surround shape, and installing new material. Resurfacing over the existing pebblecrete avoids all this.
When Pebblecrete Replacement Is Needed
Loose or missing pebbles at scale. If a significant proportion of pebbles have loosened and the matrix is crumbling across wide areas, there may not be enough sound pebblecrete left to resurface over. An overlay needs a stable substrate.
Complete cement binder failure. If the binder has broken down to the point where the pebbles brush away with foot traffic, the pebblecrete is no longer a structurally useful surface. This is relatively rare even in very old pebblecrete but does occur.
Drainage or structural issues beneath. If the problem is under the pebblecrete — poor drainage causing ongoing water movement, structural issues with the pool shell — resurfacing on top won’t help.
For most Port Stephens pebblecrete that’s 25–40 years old, resurfacing is the appropriate solution. Replacement is usually not necessary.
The Pebblecrete Resurfacing Process
Resurfacing over pebblecrete requires a different preparation approach than smooth concrete:
1. Deep cleaning: Pebblecrete’s rough surface traps dirt, algae and chemical deposits. We use high-pressure washing with appropriate cleaning agents to clean between pebbles and remove surface contamination.
2. Stabilisation of loose sections: Any loose pebbles are secured or removed before overlay goes down. We don’t overlay over obviously loose substrate.
3. Diamond grinding (sometimes needed): For pebblecrete with particularly sharp or proud pebble edges, a light diamond grind can knock back the worst protrusions and create a more consistent surface for the overlay to bond to. This also helps remove any previously applied sealers.
4. Bonding primer: The primer application on pebblecrete needs to penetrate into the rough surface to bond effectively. We allow primer to fully saturate the rough pebblecrete surface before the overlay is applied.
5. Overlay application: The cementitious overlay is spray-applied in sufficient thickness to cover the pebblecrete texture and create a smooth, even surface. Pebblecrete typically requires slightly more overlay material than smooth concrete because of its surface relief.
6. Non-slip finish and sealing: Same as any pool surround resurfacing — non-slip aggregate in the topcoat, chlorine-resistant UV-stable sealer.
Result: A smooth, attractive pool surround over the existing pebblecrete base. The pebblecrete is encapsulated; the new surface is non-slip, chlorine-resistant and AS 4663:2013-compliant.
Cost of Pebblecrete Resurfacing vs Replacement
| Approach | Typical Cost (medium surround, 55m²) | Notes |
|---|---|---|
| Resurface over pebblecrete | $4,500–$7,500 | Includes extra prep for rough surface |
| Pebblecrete removal + replacement | $12,000–$22,000+ | Demolition, disposal, new pebblecrete or alternative |
Resurfacing is typically 30–50% of the replacement cost. For most homeowners, this makes resurfacing the clear choice unless the pebblecrete is genuinely too degraded to serve as a substrate.
Frequently Asked Questions
Will the resurfacing feel smooth to walk on after the pebblecrete is overlaid? Yes. The overlay creates a new, smooth surface over the pebblecrete — the texture of the pebblecrete beneath doesn’t telegraph through. The non-slip aggregate in the topcoat provides the appropriate grip for a wet barefoot area without the uncomfortable sharp-edged texture of old pebblecrete.
My pebblecrete has a few loose pebbles but is mostly intact. Can it be resurfaced? Generally yes. We stabilise or remove loose pebbles as part of preparation. The overall pebblecrete structure only needs to be stable enough to provide a bonding substrate — it doesn’t need to be perfect.
Will the new overlay colour match my pebble colours? No — the overlay completely covers the pebblecrete and creates a new, uniform surface in the chosen colour. The colour match to existing pebblecrete isn’t possible or typically desired — the whole point is a fresh, uniform appearance.
My pebblecrete is from the 1980s and has never been touched. Is it too old to resurface? Age alone doesn’t prevent resurfacing — condition does. 40-year-old pebblecrete that is still structurally sound (pebbles in place, binder still there) can be resurfaced. The preparation needs are more intensive for older pebblecrete, but the outcome can be excellent.
Does resurfacing pebblecrete affect pool water quality or chemistry? A properly cured overlay and sealer is chemically inert to pool water. There’s no effect on pool water chemistry from a correctly installed resurfacing system. We use products specifically tested for pool surround applications.