Littleton Exposed Aggregate Concrete

We turn down more exposed aggregate work than any other decorative finish we offer. Not because it's difficult, though it is, and not because we don't like it. We love it. But it's a finish with strong opinions about where it lives, and homeowners usually arrive having seen one gorgeous example without hearing anything about the spots where it disappoints.

So this page is a decision, not a brochure. Washed stone is the right answer for a shaded north-side walk in Ken Caryl that ices over at dusk. It's a questionable answer for a covered porch where you'll be dragging chairs twice a day. Between those two sits every other property in town: older lots around Columbine and Southbridge, newer yards in Highland Walk. The call always comes down to what that specific spot puts up with after we've gone home.

Start with what the spot has to survive

Every other decision gets easier once you answer four questions about the area. Sun, or shade half the day? Do bare feet use it? Does a shovel go across it in January? And is anything with hard casters or thin metal legs going to live on it?

A washed surface wins big on grip. Cement paste gets rinsed off the top while the concrete is young, so you're standing on rock, and rock holds when the surface is wet or when snowmelt refreezes after the sun drops behind the foothills. It also hides a working yard: dust, dog tracks, the drip zone under a grill. And it never pretends to be something else. The stone is real.

Where it loses is comfort and furniture. Bare feet notice it. Chair legs catch. A rolling cooler is a chore.

Signs this is the right finish for your spot

• The area holds shade and glazes over when meltwater refreezes at night
• There's slope steep enough that a smooth surface would make you nervous
• Dogs, bikes, garden tools, and mud cross it daily
• You want a look that isn't imitating stone or brick
• Nobody sits out there barefoot for long
• Snow comes off with a shovel or blower, not a steel plow edge
• You'd rather rinse twice a year than reseal color on a clock

Where we'd use it, and where we'd point you somewhere else

Retarder or a hose, and what that choice costs you

Two honest ways exist to uncover the stone. The first is waiting for the slab to firm up and washing the top paste off with water and a soft brush. Traditional, cheap, and it hands the crew a window that opens and closes on the concrete's schedule rather than ours. Warm afternoon with a dry wind moving and that window shrinks to almost nothing.

The second is a surface retarder sprayed on right after finishing, which holds the top paste soft while the concrete below sets normally. That buys hours instead of minutes and gives a deeper, more even exposure, and it costs more. On a big pour, or anything placed in July, it's what we reach for. When the exposure has to match concrete you already own, retarder is the only way to hit a depth on purpose.

The wash is the only part of this job you can't redo. Everything else gets a second chance. Start thirty minutes late and the stone stays buried; start early and you rinse it out of the slab and into the grass.What the crew sees on site

Stone, snow, and the pouring calendar here

Stone choice is the whole look, so we bring samples instead of describing them. Rounded river blends read soft and warm. Crushed granite reads sharp. Gray blends disappear into a Ken Caryl hillside the way people out there tend to want. Size is what matters underfoot: smaller stone gives more contact points and a friendlier surface.

Washing season runs May through early October and we won't stretch it. The wash needs water that won't freeze in the slab overnight, air warm enough for a predictable set, and no hail cell arriving during the two hours that matter. Early fall is our pick: dry, mild, storms mostly finished. Winter is a hard no, and a December call gets booked for spring rather than gambling a patio on one warm week.

One more thing about year one. No deicer at all, ever if you can manage it. Sand only, and rinse the surface in late winter so road chemical isn't sitting in the texture all spring.