Concrete isn't supposed to be green.

What's actually on your driveway

Concrete looks porous up close because it is. Dirt, pollen, algae and mildew settle into it and stay. Add tire marks, a few oil spots, and whatever ran off the roof for the last five years, and the slab ends up two or three shades darker than the day it was poured.

Green patches along the shaded edge are organic growth, same family of problem as a dirty roof. They also get slick when wet, which matters on a walkway or pool deck.

Why we use a surface cleaner

A spinning surface cleaner covers concrete in even, overlapping passes. A hand wand does not — it leaves the arc marks you've seen on driveways all over town, and once they're there they don't blend back out. Edges, cracks and corners get detailed by hand after the main pass.

What we clean

• Concrete driveways and aprons
• Sidewalks and walkways
• Patios, porches and steps
• Pool decks
• Garage floors
• Curbs and retaining walls

About stains

Washing removes dirt and organic growth. Deep oil stains, rust and paint are a different job — sometimes they lighten a lot, sometimes they don't come all the way out. Send a photo of the stain and we'll tell you honestly what to expect before you book.

Sidewalks, walkways and patios

The flatwork around a house usually goes green before the driveway does. Walkways sit in shade more often, patios collect leaf litter and pollen, and a covered porch stays damp long after everything else has dried out.

It's the same surface cleaner and the same even passes we use on a drive, just slower around edges, beds and anything we don't want to spray. Steps and thresholds get done by hand where the machine can't sit flat.

• Walkways and front paths — usually the greenest concrete on the property
• Patios and porches — including covered areas that never fully dry
• Pool decks — cleaned at a pressure the surface can take
• Steps, landings and garage aprons

Doing these at the same time as the driveway is cheaper than booking them separately, because the setup is already on site.