What Is Exposed Aggregate Concrete? A Simple Guide

Exposed aggregate is one of the most popular decorative concrete finishes in Australia, valued for combining a distinctive look with genuine practical benefits.

How Exposed Aggregate Concrete Is Made

Exposed aggregate starts as a standard concrete pour, but with decorative stones, pebbles, or gravel mixed through it. Once the concrete has partially set, the top layer of cement paste is washed or brushed away, revealing the aggregate underneath. The result is a textured surface that shows the natural colour and shape of the stones rather than a flat grey finish.

Why Choose Exposed Aggregate?

Slip Resistance

The textured surface provides better traction than smooth concrete, particularly when wet — one reason it’s a common choice around pools and outdoor entertaining areas.

Durability

Exposed aggregate is still fundamentally a concrete slab, so it carries the same structural durability as standard concrete while adding a decorative surface layer.

Design Flexibility

Aggregate can be sourced in a range of colours and stone types, and combined with different concrete base colours, giving a wide range of finished looks from natural river-stone tones to more contemporary combinations.

Common Uses

Exposed aggregate is frequently used for:

• Driveways
• Pool surrounds
• Pathways
• Patios and outdoor entertaining areas

Maintenance

Exposed aggregate is relatively low-maintenance. Regular sweeping and occasional washing keeps it looking its best, and resealing every couple of years helps protect the surface against staining and wear.

Frequently Asked Questions

Is exposed aggregate more expensive than plain concrete?

It typically costs more than a plain concrete finish due to the additional materials and labour involved in exposing the aggregate, though it’s generally more affordable than natural stone paving.

How long does exposed aggregate take to install?

Timelines depend on the size of the area and site conditions, but the exposure process itself — washing or brushing back the surface — needs to happen within a specific window after pouring, so it requires an experienced hand to get right.