Soft washing is how exterior walls should be cleaned in El Paso: low pressure, the right solution, adequate dwell time, and a gentle rinse. It handles the organic growth and film that pressure cannot remove without damage, and on stucco and adobe it is the only appropriate method.
Quick answer
Soft wash kills mildew, algae, and bacteria on exterior surfaces using low pressure (~500 PSI) and a biocidal cleaning solution.
The checklist is the same everywhere. What is on your glass is not. These are the conditions that actually shape this job in El Paso. Each one is true here and false in plenty of other towns we serve.
Stucco and adobe are porous by design. They are supposed to breathe. High pressure drives water past the surface into the assembly behind it, and it does not dry out from there. The result appears weeks or months later as blistering, staining, or a moisture problem that gets blamed on something else. Soft washing puts the work on the chemistry instead of the force, which cleans more thoroughly and leaves the wall intact. In El Paso this is not a preference, it is the correct method.
On nearly every El Paso property, the north and shaded elevations carry visible organic growth while the sunny sides look fine. Shade holds moisture, and moisture grows algae and mildew on any surface that will hold it. Pressure removes the visible layer and leaves the biology, so it returns fast. A soft wash with the correct solution kills the growth rather than just knocking it off, which is why the result lasts a season or two instead of a few months.
El Paso is on El Paso Water's blend of Rio Grande surface water, Hueco and Mesilla Bolson wells, and desalinated brackish groundwater. Desert groundwater has spent a long time in basin sediment and carries the dissolved calcium, magnesium and salts to prove it, and here it dries on glass in a climate built to evaporate it: low humidity, strong sun, and a dry season that runs most of the year. Drip lines, sprinkler heads near the house, misters on a patio, a hose rinse left to air-dry, and a roof cooler's bleed water all leave mineral behind, and in this sun it bonds within days rather than sitting loose on the surface. Caught in its first season it washes off with the right chemistry. Left for a few summers it becomes etching, and etching is in the glass, not on it.
El Paso genuinely splits: older flat-roof construction drains through canales down the outside wall, while newer pitched-roof housing has conventional gutters. That means two houses on the same street can need opposite services. We look at the roof before quoting, and if your building has no gutters we will tell you that rather than sell you the service anyway.
Low-pressure (~500 PSI) wash of every exterior surface: vinyl, fiber-cement (Hardie), stucco, painted wood, brick, masonry. Hardware-friendly: trim, gutters, soffit, and fascia all included.
Biocide application: sodium hypochlorite-based solution (the standard for soft-wash) that kills mildew, algae, lichen, and the black/green biological staining you see on shaded north-facing walls.
Plant and lawn protection, surfactant rinse during application, then full rinse-down at the end so nothing carries to your landscape.
Window pre-coat, we coat windows with plain water before the biocide so any drift doesn't streak the glass. We can also include the windows in the same trip, soft wash + window cleaning is a popular combo.
Optional add-ons: deck soft-wash, fence soft-wash, full-property bundle with driveway pressure wash.
Enter your address. Our autoquoter sizes the home; we'll confirm siding type and any add-ons when scheduling.
Plant covers, lawn pre-rinse, window pre-coat (plain water). Pets indoors. We tape any wall outlets or vents that need protection.
Top-down soft-wash with the biocidal solution. Dwell time 5-15 minutes, long enough to kill the biological staining, not long enough to damage paint.
Plain-water rinse from top to bottom to remove all solution and dead biological material. We watch for any streaking and re-apply if needed.
Walk-around to confirm clean coverage, plants and lawn rinsed, no overspray on neighbors. Before/after photos emailed.
Every El Paso property is priced individually from your home's square footage, window count, stories, and access, using real completed El Paso jobs, not a national average. The fastest way to know your number is to get it directly:
Get your quote here:
Get Your Instant QuoteExact, bookable price for your address in 30 seconds. No callback and no in-home estimate.
Foothill homes under the Franklin Mountains with big view glass. The west and south faces take the spring wind head-on, so tracks and screens fill with sand first here.
Larger lots along the Rio Grande with mature trees, irrigated lawns and nearby fields. Sprinkler spotting and valley dust are the standing issues, plus leaf litter the rest of El Paso does not have.
Early 20th century homes on the slope below the mountain, near UTEP. Older windows and hand-set glass, worked by hand with care.
One of El Paso's oldest neighborhoods, with Victorian and brick homes and original glazing. We check old putty before we touch it and tell you what we find.
A historic district of 1920s and 1930s brick and revival-style homes near Memorial Park, with divided-light windows that are slow, careful work.
Postwar ranch homes and newer stucco toward Fort Bliss, open to the desert to the north. Wind-blown sand in tracks and screens is the main story.
See every neighborhood and the full local guide on our El Paso window cleaning page.
El Paso is in the Chihuahuan Desert, served by Sonlight's El Paso-based crew since October 2026. Glass here deals with two dust seasons (the spring wind, February into May, and the July to September monsoon), hard groundwater that dries fast in strong sun, and evaporative coolers on much of the older housing.
Most homes in the area are stucco, and older ones are adobe or lime plaster. Pressure drives water into stucco and damages lime plaster, so walls get low-pressure soft washing, mildest chemistry first, and nothing at all near historic plaster that will not tolerate it.
Pressure washing uses force; soft washing uses chemistry at low pressure. Hard surfaces like El Paso driveways and walks take pressure fine. Walls, stucco, adobe, should never take it, because pressure drives water into the assembly where it causes damage that shows up later. Soft washing cleans those surfaces more thoroughly and does not put moisture where it does not belong.
A season to two years depending on exposure. North and shaded elevations regrow first because they hold moisture. The reason a soft wash lasts longer than a pressure wash is that the solution kills the organic growth rather than just removing what is visible, pressure leaves the biology behind and it comes back within months.
Soft wash uses low pressure (~500 PSI) and a biocidal cleaning solution. Pressure wash uses high pressure (~3,000 PSI) and mechanical force. Soft-wash is for siding, stucco, painted wood. Anything that high pressure could damage. Pressure wash is for concrete, brick, and other durable hard surfaces.
No, when done properly. We pre-rinse plants and lawn before applying the biocide, use a surfactant during application, and do a full final rinse so nothing accumulates. Plants are the same green color when we leave as when we arrived.
Yes. Soft wash is the right tool for stucco, high-pressure washing damages stucco by pushing water behind the surface and eroding the texture. Soft-wash cleans without any mechanical force on the surface itself.
Yes. Wood decks, composite decks, and painted wood decks all benefit from soft wash. The biocide kills the black mildew that builds up between deck boards. Pre-stain or pre-paint prep is a common request.
Get your free quote in 30 seconds.
Get Instant QuoteOr call anytime: 915-275-1086