Last Updated on October 20, 2026 by Umar Farooq
Aggregate pavers are precast concrete pavers whose top layer of cement paste has been washed or treated away to reveal the decorative stones inside, so the surface is a mosaic of pebbles or crushed rock rather than smooth concrete. They give strong wet grip and hide dirt well, but larger, sharper stones are harsh on bare feet and trap grime. For patios and pool decks, choose small, rounded aggregate and seal it with a low-sheen penetrating sealer. If this applies to your yard, our guide to eco friendly pavers goes into more detail.
I read through the product pages and install notes from several makers expecting a long list of types. There are really two decisions: how big the stones are, and how rounded. Everything else follows from those.
How exposed aggregate pavers are made
The paver is cast like any other concrete unit, but the mix includes a chosen decorative stone: river pebbles, granite chips, quartz or colored gravel. Before the surface cures fully, the top film of cement paste is removed, by washing, a surface retarder, or light blasting. Stepstone's exposed aggregate product page describes it as a surface treatment that reveals the decorative mineral rocks inside, in different colors and sizes.
Because it is done at the factory, you get a controlled finish without the timing risk of exposing a poured slab yourself. Common formats are 12, 16, 18 and 24-inch squares and rounds, often used as stepping stones or as slabs on a gravel base.
Some sellers also use "aggregate pavers" for something quite different: open plastic or concrete cells filled with loose gravel to make a permeable parking area. Those are grid systems, covered in our guide to plastic pavers.
Stone size and shape decide the feel
My one firm opinion here: if anyone will walk on it barefoot, buy small, rounded aggregate or buy a different paver.
The Concrete Network's guide to exposed aggregate patios recommends aggregate of 1/4 inch or smaller, rounded rather than flat or sharp, for maximum comfort. That tallies with the mechanism. Small, rounded stones sit close together and stand only slightly proud of the cement, so your foot bears on many smooth points. Large crushed stone stands higher, with sharp edges and deep gaps between them. That gives excellent grip on a ramp but feels like a gravel driveway to bare feet. (Kneeling to weed a large-aggregate path is an experience you only need once.)
| Aggregate | Grip when wet | Barefoot comfort | Cleaning | Good for |
|---|---|---|---|---|
| Fine, rounded (up to 1/4 in) | Good | Good | Easy | Pool decks, patios |
| Medium pebble (3/8 to 1/2 in) | Very good | Fair | Moderate | Walkways, steps |
| Large or crushed (3/4 in and up) | Excellent | Poor | Harder | Ramps, shaded or sloped paths |
Walk a sample barefoot before committing. Thirty seconds settles it better than any spec sheet.
Aggregate pavers versus smooth and textured concrete
Exposed aggregate sits between smooth pavers and rough natural stone. It hides dirt, tire marks and small chips, because the eye reads the whole surface as speckled. It grips better than smooth or sealed concrete. On the downside, it costs more, it's harder to sweep, and chair legs catch on larger stones. Bonita Stone's pros and cons of aggregate pavers makes the same trade: excellent slip resistance, less comfort underfoot.
If you are weighing aggregate against tumbled, split-face or cleft finishes, our overview of paver styles compares the textures side by side.
Pebble pavers and pebble mosaics
"Pebble pavers" can mean two things. The first is a precast aggregate paver with rounded river stones on top, which lays like any other slab. The second is a true pebble mosaic, where stones are set on edge into mortar by hand, in patterns. Mosaics are beautiful as a focal point but slow to build and bumpy to walk on. Keep them to small panels or borders and walk on the aggregate pavers around them.
Laying aggregate pavers and slabs
They install like other concrete slabs: a compacted gravel base, a screeded bed of sand, then the pavers, tapped level with a rubber mallet. A plate compactor goes over them only with a protective pad, because the exposed stones are the first thing a bare steel plate chips. For stepping stones, set each one on a small bed of sand in the turf so it sits just at grass height.
Cut edges look different from the finished face, because the saw slices the stones flat. Plan the layout so cut edges go against the lawn or a wall, not where everyone looks.
Cleaning and sealing exposed aggregate
The nooks between stones hold dirt, leaves and algae. Sweep often with a stiff broom, rinse with a hose, and scrub stains with a mild detergent. A pressure washer on a fan tip is fine for a deep clean, but keep it moving and at a distance, because a narrow jet can loosen stones in older pavers. Our guide to paver cleaning covers stains in more detail.
Sealing helps aggregate more than most finishes, because it slows staining and binds the surface. The Concrete Network suggests resealing at least every two years in freezing climates. Use a penetrating or low-sheen product: a high-gloss film fills the texture you paid for and turns slick when wet. A wet-look sealer deepens stone colors nicely, but only choose it for dry, sunny areas.
Keep the stones small where feet are bare
Exposed aggregate earns its place wherever grip and dirt-hiding matter more than smoothness. Small, rounded stone for pools and patios; larger crushed stone for ramps and shady paths. Keep the compactor padded and the sealer low-sheen. And trust the barefoot test over the brochure photo: your feet are the only reviewers who have to live with it.
FAQ
What are aggregate pavers?
Aggregate pavers are concrete pavers with the top layer of cement removed to expose the decorative stones in the mix. The result is a textured, speckled surface of pebbles or crushed rock with good slip resistance.
Are exposed aggregate pavers slippery?
No, they are among the grippier paver finishes when wet, because the stones break up the water film. A high-gloss sealer or algae in shade can reduce that grip, so use a low-sheen sealer and keep them clean.
Are aggregate pavers good around a pool?
Yes, if the aggregate is small and rounded, around 1/4 inch or less. Larger or crushed stone grips well but is uncomfortable for bare feet.
Do exposed aggregate pavers need sealing?
They don't strictly need it, but sealing slows staining, makes cleaning easier and helps in freezing climates. Use a penetrating or low-sheen sealer and reseal when water stops beading.
