Exposed Aggregate Concrete

Exposed aggregate is worth a look when you want a surface with texture and grip that does not show every mark, and you would rather not stare at hairline cracks and tire scuffs for the next decade. It shows up on pool surrounds, patios, and driveways precisely because the pebbled surface forgives the small stuff that a smooth finish puts on display.

The finish is all in the timing

Exposed aggregate starts as an ordinary pour, often with decorative stone seeded into or mixed through the top. The look comes from washing away the thin skin of cement paste at the surface to reveal the stone underneath, and the entire job lives or dies on when that wash happens. Too early and the crew rinses out the stone along with the paste; too late and the paste has hardened and will not release. There is no second take, which is why an experienced finisher matters more here than on almost any other flatwork.

That sensitivity gets harder in Georgetown heat. A hot, windy afternoon sets the surface faster and narrows the window to get the wash right, so summer pours are timed for early morning and watched closely.

Why it hides what a broom finish shows

A broom finish is a flat canvas, and a flat canvas shows every hairline, stain, and scuff. Exposed aggregate breaks up the surface visually, so the small cracks that any slab develops as it cures and rides the seasons disappear into the texture. Dirt and tire marks fade the same way. On ground that moves, that forgiveness is a real advantage: the slab still cracks, but you notice it far less.

Traction, sealing, and cost

The texture that hides marks also grips wet feet, which is why exposed aggregate turns up around pools and on gentle slopes. The tradeoff is that it can feel rough underfoot and is harder to sweep. It also asks for sealing to lock the surface stone in place and keep the color from going flat over the years.

Published industry cost data puts exposed aggregate at roughly $8 to $18 per square foot, so a typical 500 square foot driveway or patio runs about $4,000 to $11,000, with the decorative stone and the skilled finishing accounting for the premium over broom. If bare feet and water are part of the plan, it pairs naturally with a pool deck or a patio, and our sealing guide covers what keeps the surface looking new.

Because the finish rides so much on the crew, ask any bidder to show you an exposed aggregate job they poured a few years back rather than a fresh one, so you can judge how their wash and their sealing have held up. Ask which aggregate they plan to use and whether you get to pick it, since the stone size and color set the entire look. And find out who on the crew actually runs the wash, because that one person's timing is most of what you are paying for.