How much does exposed aggregate concrete cost compared to a plain finish?

Wash-expose exposed aggregate typically runs $2–$5 per square foot more than a standard broom finish, depending on the aggregate and the complexity of the pour. Seeded surface work is more — the labor to broadcast and press the aggregate is significant, and specialty aggregate has its own material cost. Both are less expensive than stamped concrete for most applications.

Can I match the aggregate color to my house or pavers?

With seeded aggregate, closely — you're choosing the stone type, size, and color palette before the pour. With wash-expose, the color range is what the ready-mix plant puts in the mix, which is natural river stone in your area. It won't match a specific color but it works with most neutral house palettes. If you need an exact match, seeded is the right approach.

How do you maintain exposed aggregate concrete?

Seal it every three to five years — this is the main maintenance requirement. Between seals, clean it with a pressure washer and a concrete cleaner when it gets dirty. For oil stains on a driveway, a degreaser and some dwell time before rinsing handles most of it. The finish itself doesn't need grinding, patching, or recoloring the way stamped concrete eventually does.

Is exposed aggregate slippery when wet?

Less so than smooth concrete — the stone texture provides grip that a troweled finish doesn't. On pool decks and exterior walkways it's a positive feature. With a slip-resistant sealer additive it performs well even when continuously wet. Plain smooth concrete sealed without an additive is the version that gets genuinely slippery; exposed aggregate with the right sealer is notably safer.

Can exposed aggregate be done over an existing slab?

Not as a new wash-expose application — you can't apply a retarder to an existing cured slab. If you want the look on existing concrete, the options are a pebble-finished overlay system (a bonded thin-set layer with aggregate pressed in) or a full demo and repour. Overlays are a real option but they're thinner and bond-dependent; we'll tell you honestly whether the existing slab is a good candidate.

Close-up of exposed aggregate concrete showing rounded river stone texture

Decorative Finish

Exposed Aggregate Concrete for Driveways, Patios & Walkways

Exposed aggregate shows the natural stone in the mix — textured, slip-resistant, and more durable than a painted or stamped surface.

Wash-expose & seeded methodsRiver stone, quartz & specialty aggregateNaturally slip-resistant finishNo color to fade or chip

Call or Text (669) 200-9478 Request a Quote

20+Years in Business

55Cities Served

1,000+Projects Completed

Methods: Wash-expose · seeded surface
Common applications: Driveways, patios, pool decks
Maintenance: Reseal every 3–5 years
Estimates: Free & written

Exposed Aggregate Concrete — At a Glance

Exposed aggregate shows the natural stone in the mix — textured, slip-resistant, and more durable than a painted or stamped surface. Dueling Trowels Concrete Solutions provides exposed aggregate concrete services across 55 cities in Santa Clara, Alameda, San Mateo, and Santa Cruz counties, including San Jose, Oakland, Fremont, and Sunnyvale. Licensed, insured, and backed by a written workmanship warranty. Free written estimates.

Exposed aggregate concrete surface with rounded river stone visible throughout

Natural Texture, Built In

The Aggregate Was Always There — We Just Let You See It

Standard concrete finishes hide the stone. The cement paste is troweled or broomed smooth over the top, leaving a uniform gray surface. Exposed aggregate does the opposite: the surface paste is removed before it fully sets, revealing the rounded river stone, pea gravel, or decorative rock that was in the mix from the start.

The result is a textured, naturally slip-resistant surface that looks genuinely different from plain concrete. The color comes from the aggregate itself — it can be a natural river-stone mix for an organic look, or a seeded surface aggregate for a more controlled color and size palette. Either way, the texture is structural rather than applied, which means it doesn't fade, chip, or wear away the way a stamped pattern or paint does.

In the Bay Area the most common applications are driveways, patio surrounds, pool decks, and walkways — places where some texture underfoot is an advantage and where the natural stone look fits better than a broom finish or a stamped pattern.

Texture is part of the concrete, not applied to the top
Naturally slip-resistant — useful on pool decks and rain-wet driveways
Color comes from the aggregate — doesn't fade under UV
No pattern to crack, chip, or wear off over time

Wash-Expose vs. Seeded Surface

Two methods produce an exposed aggregate finish. Which one fits depends on how much control you want over the final look.

Wash-Expose (Standard)

Uses the aggregate that's already in the ready-mix concrete
Retarder is applied to the surface immediately after screeding; the slab is washed and brushed the next morning to remove the paste and expose the stone
Color and size of aggregate varies by mix — less predictable, more natural-looking
The most common and most cost-effective approach for driveways and patios
Works well when the natural aggregate is attractive and the client accepts variation

Seeded Surface (Decorative)

A base slab is poured first, then a selected aggregate is broadcast and pressed into the surface by roller or hand
Allows complete control over aggregate type, color, and size — river stone, quartz, recycled glass, or specialty rock
More labor-intensive and more expensive than wash-expose
The right choice when a specific color palette or a very clean, uniform look is the goal
Common for feature areas within a larger pour, or for pool decks where a specific pebble type is specified

Aggregate Options

The aggregate is the finish. These are the most common choices across our Bay Area work.

River Pebble & Pea Gravel

Rounded, smooth stones in a natural gray-brown palette. The most common choice for driveways and patios — familiar, durable, and works with most house styles. Size ranges from 3/8 inch pea gravel to 3/4 inch river pebble.

Quartz & Granite Chips

Angular crushed stone in a wider range of colors — buff, tan, white, charcoal, and blended palettes. Catches light differently than rounded stone and gives a more polished appearance. Common on pool decks and feature areas.

Specialty & Recycled Glass

Tumbled recycled glass, polished stone, or mixed custom blends for a more distinctive look. Typically seeded rather than mixed in — used when a specific color story is more important than cost.

Where Exposed Aggregate Works Best

Ideal applications

Driveways — the texture grips tires and doesn't show oil as readily as a smooth surface
Pool decks — naturally slip-resistant when wet, stays cooler underfoot than dark aggregate
Patios and walkways where some grip underfoot is an advantage
Side yards and utility paths where a lower-cost decorative finish is preferred over stamped
Entry walks where a natural stone look complements brick or stone cladding

Less ideal applications

Interior floors — the textured surface collects dirt and is harder to keep clean indoors
Areas where bare feet are common and comfort matters more than grip
Surfaces that need a specific color match to tile, pavers, or other adjacent material
Slabs where the ready-mix aggregate is unattractive and seeding isn't in the budget

How the Finish Gets Made

Sub-base and form preparation

Same base requirements as any flatwork — compacted aggregate to depth, forms set for slope and drainage, reinforcing steel chaired and tied. Exposed aggregate doesn't change what's under the slab.

Concrete placement and screeding

Ready-mix is placed and screeded level. For wash-expose, the standard mix is used. For seeded work, a base mix without coarse aggregate is placed first, then the surface stone is broadcast immediately and pressed in by roller.

Retarder application

A chemical retarder is sprayed or rolled onto the surface immediately after bull-floating. It slows the hydration of the top paste layer, keeping it soft enough to wash off the next morning while the body of the slab sets hard underneath.

Covering and cure overnight

The slab is covered with plastic sheeting to protect the retarder from evaporation and rain. The body of the slab cures through the night.

Wash and expose

The next morning, the plastic is removed and the surface paste is washed and brushed away with water and a stiff brush. The depth of exposure is controlled by timing and water pressure — typically 1/4 to 3/8 inch of aggregate is revealed.

Cure and seal

The finished surface is allowed to cure to full strength, then sealed with a penetrating or film-forming sealer depending on use and preference. Sealing brings out the color and protects the surface — on driveways and pool decks, a sealer with a slip-resistant additive is standard.

Sealing Is Part of the Job, Not an Upsell

Exposed aggregate concrete is porous. Without a sealer, water and oil penetrate, staining and freezing inside the pores. In the Bay Area's mild climate concrete doesn't face freeze-thaw damage, but oil from a driveway and pool chemicals from a deck both need a barrier. A quality penetrating sealer applied at completion and reapplied every few years is the maintenance this finish requires.

Exposed Aggregate vs. Stamped Concrete

The two most common decorative concrete choices for driveways and patios — both legitimate, genuinely different.

Exposed Aggregate

Color comes from natural stone — no surface colorant to fade over time
Texture is structural — won't crack or chip away like a stamped pattern
Naturally slip-resistant without additives
Lower cost than stamped in most cases
Best when the natural stone look fits the style of the property

Stamped Concrete

Mimics stone, brick, or tile patterns with color hardeners and release agents
Much wider range of looks — can match specific materials or colors
Pattern depth and surface color can fade and require periodic resealing
Higher cost — the stamp work, color hardener, and release agent add labor and material
Best when the look needs to match a specific material or a more uniform finish is wanted

Exposed Aggregate Questions

Other Decorative Concrete Options

Stamped ConcretePatterned and colored concrete — mimics stone, brick, or tile for a more formal decorative look.Concrete StainingPenetrating color for existing concrete — a way to transform a plain slab without removing it.

More Concrete Flatwork Services

Related work we handle, often on the same project as this one.

Concrete FlatworkHorizontal concrete surfaces — driveways, patios, walkways, pool decks, and slabs — built on a properly prepared base.Concrete DrivewaysVehicle-rated driveways with engineered thickness, controlled cracking, and drainage that moves water away from your garage.Concrete PatiosOutdoor living surfaces planned around furniture, foot traffic, and how your household actually uses the yard.Concrete FinishThe surface treatment applied in the final hours before concrete sets — deciding texture, traction, color, and appearance.Stamped ConcreteStone, brick, slate, and plank patterns pressed into fresh concrete, colored in layers and sealed for depth.Concrete StainingPenetrating color that becomes part of the slab — a way to transform existing concrete without replacing it.Concrete FlooringMechanically ground and polished interior floors — durable, low-maintenance, and made from the slab already in place.Repair & ResurfacingRestoring cracked, spalled, or worn concrete — and an honest assessment of when repair beats replacement.Resin-Bound Gravel OverlayPremium aggregate-in-resin overlay applied over existing concrete — no demolition, seamless finish, 25-year lifespan.Walkways & Garden PathsFront entries, side-yard paths, and garden walkways built to stay level and trip-free as roots, settling, and seasons work against them.Concrete PumpingBoom and line pump placement for backyards, hillside lots, and tight side yards a ready-mix chute can't reach.Sawing & CoringDiamond blade saw cutting and core drilling for joints, utility penetrations, and demo work — scanned for rebar before every cut.Concrete RestorationCrack injection, spall repair, and structural patching for concrete that's failing but doesn't need to be torn out.

Often Quoted Alongside This

Work from our other category that regularly shows up on the same site visit.

Foundations & SlabsStructural concrete that carries the building — slab-on-grade, tilt-up panels, cast-in-place walls, and additions.Industrial FloorsHeavy-duty floor slabs engineered around forklift traffic, racking loads, and flatness tolerances.Parking LotsParking surfaces zoned by actual traffic load, with stormwater drainage and accessible routes designed in.Sidewalks & WalkwaysPedestrian concrete built to accessibility standards — sidewalks, entry approaches, curb ramps, and courtyards.

Service Area

Where We Provide Exposed Aggregate Concrete

We provide exposed aggregate concrete across 55 cities in Santa Clara, Alameda, San Mateo, and Santa Cruz counties. Ground conditions, permitting, and the failure modes we see vary city by city, so each has its own page.

Counties

Cities in Santa Clara

All Service Areas

Read Before You Decide

Guides from our Learning Center that bear directly on this kind of work.

What Is Stamped Concrete?How stone-look concrete is actually made, step by step — and the timing decisions that separate convincing work from obvious work.What Is Exposed Aggregate Concrete?How the stone gets to the surface, why it grips so well, and where it beats every other finish.What Is Concrete? A Plain-English ExplanationWhat concrete is actually made of, why it isn't cement, and what happens chemically between the pour and thirty years later.How Long Does Concrete Take to Cure?When you can walk on it, drive on it, park heavy loads on it, and seal it — with the reasoning behind each number.What Does PSI Mean in Concrete? Choosing the Right StrengthWhat the strength number on your estimate actually measures, which PSI each application needs, and why higher isn't automatically better.Can Concrete Be Poured in Winter?What cold and rain actually do to a pour, when it's fine to go ahead, and when waiting is the right call.

Want Exposed Aggregate on a Driveway or Patio?

We'll tell you which aggregate style fits your property and give you a written estimate before anything starts.

Call or Text (669) 200-9478 See Decorative Concrete Options