Soft Washing for Roofs, Siding, and Exterior Surfaces
Soft washing uses low-pressure water and a biodegradable cleaning solution to remove moss, algae, and grime without damaging shingles, siding, or paint. DeMoss & GutterMan LLC has provided safe exterior cleaning to Oregon homeowners since 1984.
Why Soft Washing Is Different From Pressure Washing
Soft washing applies water at well below 500 PSI, combined with a biodegradable cleaning solution that kills moss, algae, mildew, and lichen at the root. Because the pressure is minimal, it cannot dislodge shingle granules, crack siding panels, or drive water behind flashing and trim the way a pressure washer can.
The Right Method for Delicate Surfaces
Asphalt shingles, wood siding, stucco, and painted surfaces are not built to withstand mechanical force. Soft washing clears the growth and grime without stripping paint, loosening seams, or shortening the life of the material underneath.
Results That Last Longer
Because the treatment kills growth at the root rather than just blasting it off the surface, soft washed areas typically stay clean longer than surfaces cleared with pressure alone.
Surfaces We Soft Wash
Roofs
Asphalt shingles are the most common call-out. Soft washing clears established moss and algae without dislodging granules or shortening shingle life.
Siding & Painted Surfaces
Green algae and black mold streaks on vinyl, wood, and painted siding come off clean without stripping paint or forcing moisture behind panels.
Fencing & Wood Structures
Moss and mildew that hold moisture against wood grain accelerate rot and grey weathering. Soft washing treats fencing, pergolas, and outbuildings safely.
When We Recommend Soft Washing Over Pressure Washing
Pressure washing has its place on hard, durable surfaces like concrete driveways and patios, where force helps lift embedded stains. But on a roof or painted siding, that same force can crack shingles, strip paint, and force water into places it should never reach. We assess the surface first and use soft washing whenever the material calls for a gentler approach, reserving pressure washing for flat, hard surfaces that can take it.
Common Questions About Soft Washing
Is soft washing safe for older roofs and painted siding?
Yes. Soft washing was developed specifically because pressure washing damages delicate surfaces. The low-pressure application, combined with a biodegradable solution, removes moss, algae, and grime without dislodging granules, stripping paint, or forcing moisture behind trim and flashing.
How is soft washing different from pressure washing?
Pressure washing relies on mechanical force to blast away dirt and growth, which works well on hard surfaces like concrete but can damage shingles, siding, and paint. Soft washing uses low pressure and a cleaning solution that kills growth at the root, making it the safer choice for roofs and exterior walls.
How long do soft washing results typically last?
Because the treatment kills moss and algae at the root rather than just clearing the surface, most soft washed areas stay clean longer than surfaces cleaned with pressure alone. Regrowth timing depends on tree canopy, rainfall, and surface orientation, and we can recommend a maintenance interval after assessing your property.
Will the cleaning solution harm my landscaping or pets?
We use biodegradable, low-toxicity solutions and take care to rinse runoff away from planting beds. Pets and children should stay off treated surfaces until dry, typically a few hours. We are happy to walk you through the products used before work begins.
Get a Free Quote on Soft Washing
From a single roof treatment to a full exterior refresh, DeMoss & GutterMan LLC will tell you exactly which surfaces call for soft washing. Reach out for a free, no-pressure estimate.
