Concrete & Surface Cleaning

Oregon's wet climate grows moss and algae on any horizontal concrete surface that doesn't get full sun. Driveways, walkways, and patios turn green and slippery within a year or two if not maintained. Pressure washing strips all that growth off and restores the original surface color.

We rely on high water volume at moderate pressure for standard concrete, which is enough to remove embedded dirt and organic growth without pitting the surface. For pavers, stamped concrete, or older concrete with surface degradation, we drop the pressure and rely more on dwell time with cleaning agents. Using too much pressure on decorative surfaces blows out joint sand or damages the finish.

“Oregon's wet climate grows moss and algae on any horizontal concrete surface that doesn't get full sun — driveways turn green and slippery within a year or two if not maintained.”

Oil stains on driveways require degreaser pre-treatment. Old stains that have penetrated deep won't come out completely, but we can usually lighten them significantly. Rust stains from patio furniture or planters need acid-based treatments.

We contain runoff where possible and avoid washing contaminated water into storm drains. Oregon has strict stormwater rules, and we follow DEQ guidelines for wastewater disposal on commercial jobs.

AWP Exterior Cleaning handles concrete and surface cleaning across Oregon and Western Washington. Properties in both states deal with similar issues — moss and algae growth from constant moisture, oil stains from vehicles, and seasonal pollen buildup. Coastal properties in Western Washington see heavier salt exposure that can accelerate concrete degradation, while valley properties in Oregon deal with more organic growth from tree cover.

Typical driveway cleaning runs $150-$300 depending on square footage and staining. Patios and walkways are usually $100-$200. Large commercial parking areas are quoted per square foot after a site visit. Spring and summer are peak season — schedule a week or two out during those months. If your driveway hasn't been cleaned in over two years, expect heavier buildup and longer cleaning time.