What is soft washing?
Soft washing is an exterior cleaning method that uses a diluted cleaning solution applied at low pressure, left to dwell, and then rinsed. The solution breaks down dirt and organic growth so that water pressure does very little of the work.
The pressure used in soft washing is closer to a garden hose than to a pressure washer’s cleaning tip. Because the chemistry does the cleaning, soft washing can remove algae, mildew-type organic growth, pollen and dirt without forcing water into seams or wearing down the surface.
Across the industry, soft-wash solutions are commonly based on diluted sodium hypochlorite (the active ingredient in household bleach) combined with a surfactant that helps the solution cling and spread. Mix strength is adjusted for the surface and the level of growth. Surrounding plants are usually wetted and rinsed as part of the process.
Learn more about how we use it on our soft washing service page.
What is pressure washing?
Pressure washing cleans by force: a pump drives water through a narrow nozzle at high pressure to physically blast away dirt, stains and buildup. It is best for hard, durable surfaces that can tolerate that force.
Pressure washers used on concrete commonly operate at several thousand PSI. Professionals often use a rotary surface cleaner on flat concrete, which spreads the force evenly and avoids the stripes and swirl marks a hand wand can leave. Cleaning solutions may still be used before or after to treat organic staining or oil.
Our pressure washing service covers driveways, walkways, patios and other hard surfaces around the home.
Soft washing vs. pressure washing at a glance
Soft washing relies on chemistry and low pressure; pressure washing relies on mechanical force. Each is the right tool for a different set of surfaces.
| Soft washing | Pressure washing | |
|---|---|---|
| Water pressure | Low, similar to a garden hose | High, often several thousand PSI on concrete |
| What does the cleaning | Cleaning solution and dwell time | Force of the water stream |
| Best for | Vinyl, painted wood, fiber cement, stucco, most siding | Concrete driveways, sidewalks, many patios and hard masonry |
| Typical targets | Algae, mildew, pollen, dirt film | Ground-in dirt, organic staining, tire marks, grime on flat surfaces |
| Main risk if misused | Solution too strong or not rinsed well; plant stress | Cracked or loosened siding, gouged wood, etched concrete, water intrusion |
| Effect on organic growth | Treats the growth, not just the visible layer | Removes visible growth; may leave some behind |
Which method does your home need?
Match the method to each surface. On a typical Virginia home, the siding gets soft washed, the driveway and walks get pressure washed, and wood decks and fences get a low-pressure wash in between.
- Vinyl siding
- Soft wash. High pressure can crack panels or push water behind them. See can pressure washing damage vinyl siding?
- Fiber cement and painted wood siding
- Soft wash. Pressure can strip paint and scar the surface.
- Stucco
- Soft wash. Stucco is porous and can be damaged or stained by high pressure.
- Brick
- Usually a soft wash for organic growth, with moderate pressure only where the brick and mortar are sound. Older or soft mortar needs a gentle approach.
- Concrete driveways and sidewalks
- Pressure wash, ideally with a surface cleaner, plus spot treatment for stains.
- Pavers and patios
- Pressure wash with care; joint sand can wash out and may need replacing.
- Wood decks and fences
- Low-pressure wash with a suitable cleaner. Too much pressure raises the grain and gouges the wood.
That is why a full house washing visit often involves more than one method. A crew that uses the same approach on every surface is a red flag.
Why not just pressure wash everything?
Because high pressure can damage softer materials and often removes only the visible layer of organic growth. On siding, that means more risk and, in many cases, a shorter time before the growth returns.
- Damage: cracked or loosened siding, splintered wood, blown-out caulk and window seals, and stripped paint.
- Water intrusion: siding laps are designed to shed rain falling from above; a high-pressure spray from below can drive water behind them.
- Incomplete cleaning: blasting knocks off what you can see, but may leave growth in textured or porous surfaces.
- Streaking: a wand held at varying distances can leave visible lines on siding and concrete alike.
Wondering where “power washing” fits in? It is pressure washing with heated water. Our article on pressure washing vs. power washing explains when heat is worth it.
How Ultimate Powerwash decides between soft washing and pressure washing
Ultimate Powerwash decides surface by surface. We look at the material and its condition, then soft wash what needs a gentle touch and pressure wash what can take it.
We are a Stafford-based company that has served homes and businesses since 2005, and our team has more than 30 years of combined pressure washing experience. Most properties we visit need both methods, so we plan the job around the surfaces rather than around one machine.
- Soft washing for siding and other delicate surfaces
- Pressure washing for concrete and hard surfaces, with concrete cleaning for stains and buildup
- Low-pressure washing for decks and fences
- Satisfaction guaranteed, and free quotes
We work throughout Stafford County and the surrounding area, including soft washing and pressure washing in Fredericksburg, VA.
Related questions
Is soft washing as effective as pressure washing?
Yes, on the surfaces it is meant for. On siding, soft washing typically cleans algae and mildew-type growth more thoroughly than pressure alone because the solution treats the growth rather than just knocking off the top layer.
Can soft washing clean a concrete driveway?
Partly. A soft-wash solution can treat organic staining on concrete, but ground-in dirt and tire marks usually need pressure washing, often with a surface cleaner.
Will soft washing hurt my plants?
Not when it is done carefully. Professionals commonly wet plants before and rinse them after, and keep solution strength appropriate for the job, which limits the risk to landscaping.
Does soft washing take longer than pressure washing?
Sometimes. The solution needs a few minutes of dwell time, but less time is spent working over the surface with a wand, so total time on a house is often similar.