Soft washing is a cleaning method that uses low pressure, around the strength of a garden hose, combined with specialized cleaning solutions to remove algae, mildew, mold, and dirt. Instead of blasting grime off with force, the solution kills the organisms at the root and the surface rinses clean. It is the safe, recommended way to clean roofs, siding, screens, and other delicate surfaces.
How does soft washing actually work?
The process is chemistry first, water second:
- Protect the area. Plants and landscaping are wet down and shielded.
- Apply the solution. A biodegradable mix, typically a sodium hypochlorite blend with surfactants, is applied at low pressure.
- Dwell. The solution sits for several minutes, killing algae, mold, and bacteria.
- Rinse. A gentle low-pressure rinse washes away the dead growth and grime.
Because the cleaning agent does the work, there is no need for damaging high pressure at all.
Why not just use high pressure?
High pressure removes what is on the surface but leaves the living algae roots behind, so it grows back fast. It also damages delicate materials: it strips roof granules, cracks stucco, tears screens, and forces water behind siding. Soft washing avoids all of that while lasting much longer. Compare the two in our guide to house soft washing.
Which surfaces should be soft washed?
- Roofs — shingle and tile both require soft washing to protect the material and warranty.
- Stucco, vinyl, and painted siding
- Screen enclosures and pool cages
- Soffits, eaves, and lanais
- Fences and some wood surfaces
Hard surfaces like concrete driveways and pavers are usually pressure washed instead, though pros often pre-treat them with a similar solution for better results.
Is soft washing safe for plants and pets?
Yes, when done correctly. Professionals pre-wet and rinse landscaping, dilute the solution properly, and keep pets inside during application. The solution breaks down quickly and, once dry and rinsed, the area is safe. This careful handling is a big reason to hire a trained crew rather than experiment yourself.
Soft washing does not just clean; it disinfects. That is why a soft-washed surface stays clean far longer than one that was merely blasted.
Why is soft washing ideal for the Treasure Coast?
Florida's heat, humidity, and salt air make algae like Gloeocapsa magma and mildew grow aggressively, especially on shaded north walls and roofs. Killing the organism, not just rinsing it, is the only way to get lasting results in this climate. That is why our crews soft wash the vast majority of home exteriors in Vero Beach and across Indian River and St. Lucie counties.
What is in the soft-wash solution?
The core of a soft-wash mix is usually sodium hypochlorite (the active ingredient in common bleach) diluted to the right strength, combined with surfactants that help it cling and penetrate, and sometimes a mild masking scent. The exact dilution is what matters: too weak and the algae survives, too strong and it can harm plants or lighten surfaces. Trained technicians adjust the strength for the surface and the severity of growth, which is why professional results are consistent and safe where guesswork often is not.
How long do soft-wash results last?
Because soft washing kills the organism rather than just rinsing it, the results hold far longer than a pressure wash:
- House exteriors: commonly 1 to 2 years.
- Roofs: often 2 to 4 years.
- Screens and lanais: 6 to 12 months in humid, shaded spots.
Shade, tree cover, and coastal salt exposure shorten these windows, while sun and good airflow extend them. Either way, killing algae at the root is the reason soft washing is the standard for Florida homes.
Can you soft wash a commercial building?
Yes. Soft washing scales well to offices, storefronts, condos, and apartment exteriors, where large stucco and painted surfaces need cleaning without the damage or noise of high pressure. The same chemistry that protects a home's stucco protects a commercial facade, and low-pressure application is safer around windows, signage, and pedestrians. For property managers on the Treasure Coast, soft washing keeps buildings presentable and compliant while extending the life of the exterior finish, which is why it is the standard method for both residential and commercial cleaning here.
Wondering if your home should be soft washed? Call MainSail Pressure Washing at (772) 559-2666 for a free estimate. We will identify each surface, use the right method, and protect your landscaping every step of the way.
