Soft Washing vs Pressure Washing: The Difference Is the Surface
Quick answer
Soft washing uses low pressure and a cleaning mix that kills algae and mildew, so it's the method for siding, brick, stucco and roofs. Pressure washing uses high-pressure water to lift dirt out of hard surfaces like concrete driveways, walks and patios. Most houses need both: a soft wash for the house and roof, and pressure for the concrete.
Most people around Baton Rouge search for pressure washing when they want their house cleaned. That makes sense: it's the word everyone knows. But the house usually needs a soft wash, and only the driveway needs the pressure. Knowing the difference saves your siding and your shingles.
What Soft Washing Is
Soft washing cleans with low pressure and a cleaning mix made for the surface. The mix is what does the cleaning, not the force of the water.
That matters because the green and black on a house is growth, not dirt. The mix kills the algae and mildew, then a gentle rinse carries it away. Because the growth is killed instead of knocked loose, the surface stays clean longer.
It's the method for vinyl and wood siding, brick, stucco, painted trim and roofs. Pressure washing is a different tool for a different job.
What Pressure Washing Is
Pressure washing uses the force of the water to clean. A high-pressure stream lifts dirt, grime, tire marks and mildew out of the surface.
Plenty of people call it power washing. Around here, the two names usually mean the same job. Either way, it works on surfaces hard enough to take the force: concrete driveways, sidewalks, patios and pool decks.
On those surfaces, pressure is the right call. The table below puts the two methods side by side.
Soft Wash vs Pressure Wash, Side by Side
Here's the short version of how the two methods differ.
| Soft washing | Pressure washing | |
|---|---|---|
| Pressure | Low | High |
| What cleans | The cleaning mix | The force of the water |
| Algae and mildew | Kills it, then rinses it away | Blasts the top layer off |
| Used on | Siding, brick, stucco, trim, roofs | Concrete driveways, walks, patios, pool decks |
| On the wrong surface | Too gentle for heavy grime on concrete | Can etch siding, push water behind panels and strip shingle granules |
The right method depends on the surface, not on how dirty it looks.
Why the Wrong Method Damages a House
Most of the damage we hear about comes from using pressure on surfaces that weren't made for it.
Siding
The vinyl siding trade group warns that aiming a power washer upward can force water behind the panels, and it notes that some siding makers don't recommend power washing at all. High pressure can also etch wood and leave marks in soft surfaces.
Roofs
Asphalt shingles are covered in granules that shield them from the sun. The Asphalt Roofing Manufacturers Association says not to use a power washer on an asphalt roof, and Owens Corning warns that high pressure can loosen granules and shorten a roof's life.
That's why roofs and siding get a soft wash every time. Here's the full list, surface by surface.
Which Surfaces Get Which Method
This is how we match the method to the surface.
- Vinyl siding: soft wash. See house soft washing.
- Wood and board-and-batten siding: soft wash.
- Brick and stucco: soft wash.
- Painted trim, soffits and porch ceilings: soft wash.
- Shingle and metal roofs: soft wash. See roof cleaning.
- Concrete driveways, walks, patios and pool decks: pressure wash. See driveway and concrete cleaning.
- Windows and glass doors: a water-fed pole. See window cleaning.
Most houses need more than one of these. One trip can cover the house, the roof and the driveway, with one quote for all of it. Baton Rouge's 61.94 inches of rain a year keeps all of them busy. If you're curious why the siding goes green first, read why siding turns green in Baton Rouge.
Soft Wash vs Pressure Wash Questions, Answered
The questions people ask most when they're deciding how to get their house clean.
Is soft washing better than pressure washing?
Neither is better on every surface. Soft washing is right for siding, brick, stucco and roofs, because it cleans without high pressure. Pressure washing is right for concrete, which can take the force. Most houses need both, each on its own surface.
Is power washing the same as pressure washing?
Around Baton Rouge, people use the two names for the same job: cleaning with high-pressure water. It's the right method for concrete driveways, walks, patios and pool decks, and the wrong one for siding and shingle roofs.
Can you pressure wash vinyl siding?
Some people do, but it's risky. Vinyl siding's trade group warns that aiming a power washer upward can force water behind the panels, and some siding makers don't recommend power washing at all. A low-pressure soft wash cleans vinyl without aiming high pressure at it.
Does soft washing last longer than pressure washing?
On siding and roofs, usually yes. Soft washing kills the algae and mildew instead of blasting off the top layer, so the growth takes longer to come back. Shade, trees and rain still decide how long a surface stays clean.
Which one should I use on my driveway?
Pressure washing. Concrete is built to take high pressure, and it's what lifts dirt, mildew and tire marks out of the surface. Oil and rust stains can sit deep and may only lighten, so ask what to expect when you get a quote.
Can one company do both?
Yes. We soft wash houses and roofs, pressure wash concrete and clean windows. Ask for everything you want done at once, and you get one free quote. Once you approve it, that's the final price.
About the author
Jaylan Gerald
Owner, Gerald Washing Solutions · Firefighter · Central, LA
Jaylan Gerald is a firefighter and the owner and operator of Gerald Washing Solutions. He soft washes houses and roofs, pressure washes driveways and cleans windows across Central, Denham Springs, Zachary and the Baton Rouge area.
This article is written from how Jaylan cleans houses, roofs and concrete on the job. Outside facts link to where they came from:
- Polymeric Exterior Products Association: How to clean vinyl siding
- Asphalt Roofing Manufacturers Association: Algae Discoloration of Roofs
- Owens Corning: Why are there dark streaks on my roof?
- NOAA U.S. Climate Normals, 1991 to 2020 (Baton Rouge)
More about JaylanCall (225) 503-5675
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