Guide
Soft Washing vs. Pressure Washing: What's the Difference?
They get lumped together, but they're two different tools for two different jobs. Using the wrong one can damage what you're trying to clean.
The difference
It's pressure vs. chemistry
Pressure washing uses high water pressure to blast dirt off a hard surface. It works well on concrete and pavers, surfaces built to take that kind of force.
Soft washing uses low pressure and a cleaning solution instead. The solution does the work, not the water. It kills mold and algae at the root instead of just blasting the surface layer off, so the surface stays cleaner longer than a pressure-only wash. It also doesn't put enough force behind it to strip paint, crack shingles, or drive water behind siding.
Which is which
What gets which treatment
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Soft washed
Roofs, siding (vinyl, stucco, cedar). High pressure here risks real damage.
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Pressure washed
Driveways, sidewalks, pool decks, pavers. Built for it.
Why it matters
The wrong choice costs more than the job
Pressure washing a roof can strip granules off the shingles and shorten its life. It can also drive water up under siding instead of just rinsing the surface. Soft washing a driveway, on the other hand, won't touch ground-in stains the way pressure can. Matching the method to the surface is most of the job.
We soft wash every roof and every siding job. See house washing or roof cleaning for how that works, or why roofs get those black streaks in the first place.