Finish · Exposed Aggregate
Aggregate exposed at the surface — durable, slip-rated, textured.
Sydney's most popular premium concrete finish. River pebble, granite or basalt aggregate exposed at the surface through a controlled set-and-wash process. Visually warmer than plain concrete, more slip-resistant than burnished, and durable for decades.
How it's achieved
Exposed aggregate isn't a coating — the aggregate is part of the concrete from the start. The mix is designed with selected decorative aggregate at the top of the slab. A surface retarder is applied during placement to delay setting at the surface. Once the slab below has set firm but the surface paste is still soft, we wash off the top layer of paste to reveal the aggregate beneath. Then a final acid wash and seal.
Where it works best
- Driveways — slip-rated for vehicle and pedestrian use, durable under tyre wear.
- Pool surrounds — slip-resistant in wet, doesn't get scorching hot like dark plain concrete.
- Pathways and entries — textured surface holds visual interest without competing with the architecture.
- Outdoor entertaining areas — warmer underfoot than plain concrete, less glare.
Aggregate options
Sydney suppliers offer dozens of decorative aggregate options. Most common: river pebble (warm tones), Cowra white (light), Sydney basalt (charcoal), granite chip (mid grey), red gravel (warm earth). See the Colour Library for the full range.
Standards we work to
- AS 3727 — Pavements
- AS/NZS 4586 — Slip resistance
From our sites
Common questions
How long does the surface last?
Exposed aggregate has been used in Sydney since the 1960s. Properly placed and sealed, a driveway can look good for 25+ years with periodic reseal.
Does it need sealing?
Yes — initially after install, then every 3–5 years depending on exposure and traffic. Sealing protects the aggregate from staining and slows weathering of the surface paste.
Is it more expensive than plain concrete?
Yes — typically 30–50% more per m² than plain broom-finished concrete. Most of the premium is in the aggregate cost and the additional labour to expose and finish.