Soft washing isn't a "weaker" version of pressure washing — it's a different cleaning method built for surfaces where high pressure would cause damage. It uses water at roughly the pressure of a garden hose, combined with a specialized cleaning solution that kills biological growth at the chemical level.
Surfaces That Need Soft Washing
- Vinyl siding: high pressure can force water behind the panels
- Stucco and EIFS: high pressure can chip or erode the surface
- Painted wood trim: high pressure strips paint and raises grain
- Asphalt shingles: high pressure removes the protective granule coating
- Window screens and frames: high pressure tears screens and bends frames
- Cedar shake and other softwood siding: high pressure damages the wood fibers
- Soft brick and historic masonry: high pressure can pit the surface
How Soft Washing Actually Works
The cleaning solution is typically a blend of sodium hypochlorite (the active ingredient in bleach), surfactants that help the solution cling to the surface, and water at the right dilution for the surface type. The solution is applied at low pressure, allowed to dwell long enough to kill the algae, mildew, and mold, then rinsed away.
Because the cleaning is chemical rather than mechanical, it actually reaches biological growth deep in the pores of porous surfaces — cleaning more thoroughly than pressure could, and leaving surfaces cleaner for longer because the growth is killed at the root rather than just blasted off the top.
Plant and Pet Safety
Properly diluted soft-wash solutions are safe when applied correctly. We pre-water landscaping near the work area before any solution is applied and rinse it thoroughly afterward. Pets and people should stay clear during the application and dwell time, then can return safely after rinsing is complete.
Most manufacturer warranties for vinyl siding, asphalt shingles, and stucco specifically recommend soft washing — and warn against high-pressure cleaning. Following the manufacturer's spec protects the warranty.
When to Mix Both
A typical full house cleaning uses both methods on a single visit: soft wash for the siding, soffits, gutters, and roof; pressure wash for the driveway, walkways, and patio. Each surface gets the right treatment.
