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  • Josiah Hart

What is Soft Washing?

Soft washing or house washing is the process that commercial cleaning companies use to remove algae, mold, mildew, and organic buildup from your home's exterior siding and soffits without using high pressure. Typically this includes chemical application of a light biocide and soap solution, a dwell time to allow the chemicals to lift the dirt, algae, and mold, and a final freshwater rinse to remove the dirt and chemicals from the exterior of your home.

Pressure washers can be used to soft wash your property, but only using specialized tips that reduce the pressure of the water stream to levels safe for residential use. Without these tips, pressure washers can easily damage vinyl siding, wood, asphalt shingles and hardi plank.

To ensure we don't damage your home, most pressure washing companies prefer to use a dedicated soft wash system. These systems rely on volume and chemical application instead of pressure to clean your home. Soft wash systems usually pressurize water to between 300 and 500 psi (much less than a pressure washers 4000 to 5000 psi) in order to keep your home safe.Typically, soft wash solution will be composed of between 1% and 5% biocide cleaning agent, 1% soap, and the rest water. Your house washing company should evaluate the condition of your home before beginning work and adjust their house washing mix to fit your home. Failing to do so can result in damage to your home, damage to plants and landscaping, or failing to properly clean your home.

Soft washing is the only cleaning process that should be used on more delicate parts of your home such as vinyl, asphalt shingles, hardi plank, siding, soffits, brick, and mortar. Soft wash can also be integrated as part of the pressure washing process as a pre or post treatment for deeper stains on concrete and stone work especially if mold, moss or mildew has grown into porous surfaces that pressure alone cannot remove. Post treating with soft wash mix can also lengthen amount of time needed between cleanings as it penetrates porous surfaces and kills mold and algae at the roots.

We hope we've answered some of your questions on soft washing. Leave us any other questions in the comments below and we'll have a tech answer your questions asap!


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