“Pressure washing” gets used as a catch-all term, but blasting your vinyl siding with the same force you’d use on a concrete driveway is a fast way to strip paint, force water behind siding, or splinter a wood deck. The right approach depends entirely on the surface — here’s how to tell which one your home needs.
What’s the Difference?
Pressure washing uses high-PSI water alone to blast away dirt, algae, and stains from tough, durable surfaces. House washing (sometimes called soft washing) uses lower pressure combined with a cleaning solution to lift dirt and kill algae or mildew without damaging softer materials. Both get the job done — on the wrong surface, either one can cause real damage.
What Pressure Washing Is Good For
- Concrete driveways and sidewalks
- Patios and pool decks
- Retaining walls
- Garage floors
These surfaces can take high pressure and actually need it — it’s what lifts embedded algae, tire marks, and years of ground-in grime that a hose alone won’t touch.
What Needs a Gentler Touch
- Vinyl and fiber-cement siding
- Painted wood trim and fascia
- Wood decks
- Stucco
High pressure on these surfaces can force water behind siding (leading to mold you won’t see until it’s a problem), strip paint, or splinter and gouge wood. A soft wash gets the same result — clean, algae-free surfaces — without the risk.
Iowa’s Climate Makes This Worse
Central Iowa’s humidity, combined with the mature tree cover common in neighborhoods around Ames, Urbandale, and West Des Moines, is exactly the environment algae and mildew thrive in — especially on north-facing siding that doesn’t get much direct sun. Add in winter road salt splashed up onto lower siding and driveways, and most central Iowa homes need a wash at least once a year to stay ahead of it.
The right pressure, on the right surface, at the right time of year — that’s the whole job.
How Often Should You Wash Your House?
Once a year is the general rule for most central Iowa homes, ideally in spring after winter grime has had a chance to build up. Homes with heavy shade or tree cover, or ones close to a busy road, often benefit from a second visit.
Serving Central Iowa Neighborhoods
We wash homes across Ames, Des Moines, West Des Moines, Urbandale, Waukee, Johnston, Clive, Grimes, Norwalk, Polk City, and Cumming — always matching pressure and method to your home’s actual siding, not a one-size-fits-all setting.