What is in the solution, and at what dilution?
“Soap” is not an answer. A stucco wall, a painted door and a shingle roof do not take the same mix.
Low-pressure exterior cleaning · Westlake & Austin
Soft washing in Westlake
Insured · Written cleaning scope · One point of contact · 5.0 stars from 12 Google reviews · Austin, TX
Soft washing cleans an exterior with low pressure and a detergent solution instead of force. The solution is applied, given time to kill algae and mildew at the root, then rinsed off at roughly garden-hose pressure — so stucco, painted siding, soft stone and roofs get clean without being eroded.
Soft washing vs pressure washing: what actually does the cleaning?
The difference is not the machine, it is which part of the job does the work. A pressure washer cleans with kinetic force — water moving fast enough to knock material off a surface. A soft wash cleans chemically: a detergent and biocide solution goes on at low pressure, dwells for several minutes so it can kill what is growing, then gets rinsed away. The water is only delivery and rinse. That is why soft washing is correct on anything force would damage, and why a rushed soft wash does not work — cut the dwell time and you have removed the only thing that was cleaning.
What a Bailey & Bear soft wash covers
- Stucco, EIFS and rendered walls
- Painted siding, trim and soffits
- Wood siding, pergolas and fences
- Soft and porous stone, including Austin limestone
- Asphalt-shingle and tile roofs
- Screens, awnings, gutters and window frames
Why killing growth beats blasting it off
Most of what darkens an Austin exterior is alive. Algae, mildew and lichen — the black staining that shows first on north-facing walls and shaded roof slopes — are organisms anchored into a porous surface, not dirt sitting on top of it. Pressure takes off the visible layer and leaves the anchor points, which is why a blasted wall can look clean in September and be grey again by spring. A solution with real dwell time kills the organism through, so the surface starts over. Day one looks the same either way; the difference is how long it lasts.
Four things grow on an Austin exterior, and only three come off in one visit
Algae, mildew, lichen and moss get lumped together as “the black stuff,” but they anchor differently and the method treats them differently. What you actually have decides the dwell, whether the surface wants a second application, and — honestly — whether all of it releases on the day. This is organism identification; if your question is what a stain on limestone means rather than what is growing on it, that is stain triage and it lives on limestone cleaning.
| What is growing | Where it shows first in Austin | What the method does about it |
|---|---|---|
| Algae — green film, or black streaking on a roof | Shaded north and north-east faces, the lower third of a roof slope, walls behind shrubs. | Not dirt but a cyanobacteria that holds water against the surface. Standard dwell, one application, releases cleanly. |
| Mildew and surface mold — grey-black blotches, patchy not streaked | Under soffits and eaves, inside corners, behind shrubs — anywhere air does not move. | Sits in the pores of stucco, paint film and caulk. Standard dwell; still corners want a second pass while the wall is wet. |
| Lichen — crusty circular patches, grey-green, slightly raised | Limestone caps and mortar joints, roof tiles, fence rails, north-side hardscape. | The honest one. It anchors into the surface, so dwell kills it but the dead growth releases over weeks of weather. A second application helps; some will not be gone on day one. |
| Moss — soft green mat that holds visible water | North roof slopes, mortar joints, gutter lines, shaded edges of flatwork. | Kills readily, then gets released and rinsed rather than scraped — scraping a mortar joint costs you the joint. |
Two of these report on the building rather than the surface. Moss in a mortar joint and mildew in a corner with no airflow both mean water is sitting somewhere longer than it should — a holding joint, a downspout landing short, a shrub pressed against render. You get told which while we are on the ladder.
Which surfaces need soft washing — and which do not
Concrete flatwork, parking decks, dumpster pads and grease alleys are the opposite case: they want pressure, heat and a degreaser, and that work lives on commercial pressure washing. Limestone is a method question and a chemistry question — limestone cleaning covers what each stain means. Most properties need both methods in one visit, sequenced so nothing gets rinsed onto something already finished: planned at property level on estate exterior washing, or across shared surfaces on HOA and community washing.
Roofs: the one surface where pressure is never the answer
Shingle manufacturers' own cleaning guidance is low pressure rather than force, and the reason is granules. The ceramic grit on an asphalt shingle is its UV protection, held on by asphalt that softens in Texas heat. A pressure wand strips it, and a stripped roof fails early.
Two things a rinse-and-go crew skips: running clean water through the gutters and downspouts during the rinse; and treating the whole slope rather than only the visibly stained band, because the growth is already established on the part that still looks clean. Cleaning a roof is not repairing one — if the wash exposes cracked or lifting shingles, you get told and shown photographs, not sold a roof.
Heat and shade set the schedule, not the calendar
Dwell only happens while the solution is still wet on the surface. On a west-facing Westlake wall at four in the afternoon in August, an application can flash dry in a couple of minutes — so the biocide never got its contact time and the wall received a rinse. That is the failure the section above describes, arrived at through the weather rather than through the wrong machine.
An Austin soft wash is therefore scheduled around the sun rather than around the truck: elevations worked while they are in shade, east side early, west side late or on an overcast day. If a full-sun elevation cannot be kept wet through its dwell, it moves to another visit instead of getting a version of the job that does not work.
Plants, pools and where the rinse water lands
On a commercial lot, containment is about detergent and grease reaching a storm drain, and the pressure washing pillar covers that. On a house or an estate the risk sits closer to the building: beds, turf, a pool, outdoor kitchen surfaces, sometimes a rainwater tank.
The protocol is simple but only works in order. Saturate the planting with clean water before any solution goes up, so leaves and root zones are already full. Shield what sits directly under the work. Keep a rinse running on the beds during the wash, not only at the end. Rinse it all down again afterwards. Before we start you are told where the rinse water will run — and if the honest answer is across your pool equipment, we move the work rather than hope.
Four questions that separate a method from a machine
Ask these of anyone bidding soft washing on your property, including us.
How long does it dwell, and how do you stop it drying?
Dwell is the active ingredient. Solution that flashes off in direct sun has cleaned nothing and can leave a line.
What is the plant protocol?
If the answer is “we rinse after,” that is half of it. Pre-wetting is the half that actually protects planting.
What is your wind call?
Solution drifts onto cars, neighboring property and open windows. A crew with a wind threshold reschedules.
The wall keeps getting lighter after we leave
Day one looks much the same either way, as above — but the two surfaces are on different curves from there. A pressure-washed surface looks its best the moment the wand comes off it. A soft-washed surface is usually still improving days later: the solution killed, and the dead growth then oxidizes and rinses away with the first real rain. Lichen especially — a patch still reading grey at the final walk is often gone a month later with nobody touching it.
So judge it twice. At the walk you are judging the work: even coverage, no run lines down the stucco, gutters flushed rather than left holding what came off the roof, planting green and wet. A season later you are judging the method — did the old pattern come back?
| What happened | What it means | What should have happened |
|---|---|---|
| It came back within a season, in the old pattern | Rinsed, not killed — dwell too short, mix too weak for that surface, or the wall dried mid-application. | Solution held wet on the surface for its full contact time, at a dilution set for that surface. |
| Clean overall, but with run lines or a hard edge | Solution ran ahead of the rinse or dried on the wall. Usually a heat call that should have been a reschedule. | Work the elevation in shade, keep the plane wet, rinse the whole plane rather than the treated patch. |
| Planting browned in the days after | The plant protocol ran out of order — rinsed afterwards instead of saturated beforehand. | Beds and turf saturated with clean water before any solution goes up, kept wet during, rinsed down after. |
What actually changes how long it lasts
Regrowth is not random and it is not a scorecard for the wash. On the same house, cleaned the same day with the same solution, it returns first in the same five places: north and north-east elevations, anything under a live oak drip line, walls inside the throw of an irrigation head, the shaded lower third of a roof slope, and the north face of a limestone retaining wall. All five stay damp longest.
So the two levers that actually extend the interval are not cleaning levers: cut back what is shading and dripping on the wall, and fix the irrigation watering the building instead of the bed. A soft wash is a cleaning, not a preventative treatment, and anyone selling it as one is selling you the next wash. What you get from us is the map: at the walkthrough you are told which elevations return first and why, so you can fix the cause or plan the next visit.
What soft washing will not do
Killing growth does not touch problems that are not growth: oil soaked into concrete, rust, efflorescence, etching, acid damage or a failed sealer. Cleaning a damaged surface gives you a clean damaged surface. It does not restore stone, and it is not a sealing, striping or resurfacing service. We do not do hood, duct or exhaust cleaning — a certified NFPA 96 trade, referred to certified partners. There is no published per-square-foot rate for soft washing; it is quoted in writing per property after we have seen the surfaces, the access and where the water goes.
Frequently asked questions
What is soft washing?
Soft washing is exterior cleaning done with a detergent and biocide solution instead of force. The solution is applied at low pressure, left to dwell so it can kill algae, mildew and lichen, then rinsed off at roughly garden-hose pressure. The chemistry cleans; the water only delivers and rinses it.
Is soft washing as effective as pressure washing?
On the surfaces it is meant for, it lasts longer. Pressure knocks the visible growth off and leaves the anchor points, so the staining returns. A solution with dwell time kills the organism through. Shade, irrigation overspray and which way a wall faces decide how soon it comes back.
Which surfaces should be soft washed rather than pressure washed?
Stucco and EIFS, painted siding and trim, wood, soft or porous stone including Austin limestone, asphalt-shingle and tile roofs, screens and awnings. High pressure forces water behind stucco and through hairline cracks and strips or burnishes paint. Concrete flatwork, parking decks and dumpster pads are the opposite case.
Can you soft wash a roof without damaging the shingles?
Yes, and low pressure is the only safe way to clean one. The ceramic granules on an asphalt shingle are its UV protection, held on by asphalt that softens in Texas heat, so a pressure wand strips them and shortens the roof's life.
Will the cleaning solution kill my landscaping?
Not if the protocol runs in order. Beds and turf are saturated with clean water before any solution goes up, shielded where they sit under the work, kept wet during the wash rather than only rinsed at the end, then rinsed down again. Pools are covered or scheduled around.
What will soft washing not remove?
Oil soaked into concrete, rust, efflorescence, etching, acid damage and failed sealer. None of those are growth, so killing growth does not touch them. Efflorescence is a symptom of water moving through the material, so washing it off without dealing with the water resets the clock.
Do you soft wash in Westlake, and what does it cost?
Yes — Westlake, Rollingwood, Barton Creek and the surrounding hill country are core service area. There is no published per-square-foot rate for soft washing. It is quoted in writing per property, after we have seen the surfaces, the access and where the rinse water will run.
What is actually in a soft wash solution?
The standard chemistry for biological growth is a dilute sodium hypochlorite solution carried in a surfactant, so it clings to a vertical surface long enough to work. Dilution is not one number: a shingle roof, a painted door and a limestone cap do not take the same mix. Ask any bidder what dilution they intend to use on your specific surfaces, and get it written into the scope rather than described as “soap.”
Will one visit remove lichen?
Often not completely, and any crew promising otherwise is guessing. Lichen anchors into the surface rather than sitting on it, so the dwell kills it but the dead growth releases over the following weeks of weather and rain. A second application on the same visit helps. We say which patches we expect to release slowly before we start, not afterwards.
How long before growth comes back?
It depends on what keeps the surface damp, not on how good the wash was. A sun-exposed, well-drained south elevation holds far longer than a north wall shaded by live oaks and sitting inside an irrigation head's throw. Shade, drip line and overspray are the variables, which is why we point out which of your elevations will return first at the walkthrough.
Can soft washing be done in the middle of an Austin summer?
Yes, but the schedule changes rather than the method. Solution has to stay wet on the surface for its full contact time, and a full-sun wall in August can flash dry in a couple of minutes. Elevations are worked in shade, early or late in the day, and a wall that cannot be kept wet is moved to another visit rather than given a version of the job that does not work.
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