How exposed aggregate is made
Concrete containing decorative stone is poured and levelled. Before it fully hardens, the thin top layer of cement paste is washed or treated back to reveal the stones underneath. Timing is commonly critical, which is why the process typically needs experienced hands and suitable weather.
Choosing stone and colour blends
- Blends range from light, creamy tones to darker mixes of grey, brown and black stones.
- Stone size affects texture: smaller stones generally feel smoother underfoot.
- Ask to see samples, and consider how the blend sits with your render, brick, roof and limestone walls.
Sealing and upkeep
Exposed aggregate is commonly sealed to help hold the stones, deepen the colour and resist staining. Sealers typically need reapplying over time, especially in strong Perth sun. Your concreter will advise on the type of sealer and a likely maintenance routine.
Pros and cons
Commonly cited advantages
- Textured surface that commonly offers good grip
- Tends to hide dirt, tyre marks and minor stains
- Wide range of stone blends
Things to weigh up
- Usually costs more than plain concrete
- Periodic resealing is commonly recommended
- Rougher texture underfoot than smooth finishes
See how it compares in exposed aggregate vs plain concrete.
Frequently asked questions
The textured surface generally offers good grip, though some sealers can make it smoother. Ask your concreter about sealer options for slopes.