By Aaron Koszyk, Owner, Double A Power Washing · 9 min read
By the Fourth of July, it was green again. You cleaned it last September, it looked great through fall, and somewhere between Memorial Day and the holiday weekend the whole fence turned that familiar streaky slime green. As bad as it was before you touched it. That is not a dirty fence problem. That is a cleaning method problem.
We hear this from homeowners across Michiana constantly, from Goshen and Elkhart down through Granger and Mishawaka. The frustrating part is that the tool most people reach for first is making the cycle worse. A pressure washer strips the green off fast and the fence looks bright for a short while. But what it leaves behind sets the stage for algae to come back faster and thicker every single time.
Here is what is actually happening to your fence, and what our crew does differently when we handle vinyl fence cleaning in Mishawaka and across our service area to break the cycle for good.
Quick Answer: Vinyl fences turn green from algae, mold, and mildew that root into microscopic scratches left by pressure washing. Soft washing with a surfactant based solution kills the biology at the source and leaves the surface smooth so it stays clean longer.
Key Takeaways
- Algae, mold, and mildew root into vinyl surfaces and feed on organic debris and moisture. They do not simply sit on top waiting to be rinsed off.
- Pressure washing scratches vinyl at a microscopic level, creating a rougher texture that algae recolonizes faster after every cleaning.
- Soft washing uses low pressure and a surfactant based solution that kills the biology at the root rather than blasting the visible surface.
- Michiana’s humidity, tree canopy, and proximity to lakes and rivers accelerates regrowth. Most vinyl fences in this region need professional cleaning every one to two years.
- Double A Power Washing cleans vinyl fences only. We do not clean wood fences or apply any stain or sealer to fence surfaces.
In This Article
What Is Actually Growing on Your Vinyl Fence
The green film on a white vinyl fence is almost always a combination of algae, mold, and mildew. Sometimes all three on the same panel. These are living organisms, not surface dirt, and that distinction matters a great deal for how you clean them.
Algae are organisms that need moisture, sunlight, and organic material to survive. In Michiana, they have all three in abundance. Our summers are humid enough that the dew point barely drops overnight. Tree cover drops leaf particles, pollen, and debris onto the fence surface all spring and summer. That thin organic layer is food. Algae move in, root into any available texture on the vinyl, and multiply.
Mold and mildew work similarly but prefer shadier, wetter conditions. A fence panel that faces north, or one sitting in the shadow of a garage in Goshen or South Bend, will often show black and gray streaking from mold while the sunnier panels stay green from algae.
These organisms are not floating on top of the vinyl waiting to be rinsed away. They grip the surface at a microscopic level. Anything that does not actually kill the biology leaves the root structure behind. Regrowth starts within days, not weeks.
Why Pressure Washing Makes the Problem Worse Over Time
Vinyl looks smooth. Run your hand across a new fence panel and it feels almost slick. That surface texture is doing real work: the smoother the vinyl, the fewer places algae can grip, and the longer the fence stays clean.
High pressure water changes that.
A standard consumer pressure washer running at 1,500 to 2,500 PSI does not discriminate between removing algae film and abrading the vinyl underneath. Even one or two sessions at that pressure creates microscopic scratches across the panel face. You cannot see them with the naked eye, but algae can find them. Those surface irregularities give algae new anchor points, trap organic debris, hold moisture longer, and give mold spores more area to colonize.
The fence that took eight months to turn green the first time starts greening up much sooner after a second pressure washing. After a few seasons of this, homeowners are scrubbing their fence every single summer and wondering why it keeps getting worse.
We see this pattern regularly when we do vinyl fence cleaning in Granger and around the Elkhart area. A fence that has been pressure washed several times in a row has a noticeably rougher feel than one maintained with soft washing from the start. The surface tells you what has been done to it.
Pro Tip: Walk your fence line in early May each year. If you can see green or gray tint starting on the north facing panels, that is the right time to book a soft wash. Catching it early means shorter dwell time and an easier job overall.
How Soft Washing Breaks the Algae Cycle
Soft washing is not pressure washing with the pressure turned down. It is a different method built around chemistry rather than force.
Our crew applies a surfactant based cleaning solution at low pressure, well under 100 PSI at the surface, closer to what comes out of a garden hose than a pressure washer. The surfactant does two things. First, it breaks the surface tension that holds algae and mold to the vinyl, lifting the organism away from the panel face. Second, and more importantly, it kills the biology at the root. The active compounds penetrate the algae cell structure and stop it from reproducing.
You are not just moving green film from one place to another. You are ending the growth cycle.
After the solution dwells for a few minutes, we rinse with low pressure water. The fence comes clean without any abrasion to the vinyl surface. Because the surface stays smooth, algae have fewer anchor points when spores land again. Results genuinely last longer, not because of any promise of magic, but because we are not creating the conditions for faster regrowth.
We also soak nearby plants and lawn areas with clean water before we start, and rinse again after. The chemistry is diluted to a concentration that is effective on the fence without damaging the landscaping around it. That is standard practice on every vinyl fence cleaning near Mishawaka and across our service area.
See the Difference
See a Mishawaka Job From the Air
Drone footage from our work at Commercial Cleaning Graffiti Removal City of Mishawaka
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Call or text one of our exterior cleaning specialists, or request your quote online anytime.
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How Often Vinyl Fences Need Professional Cleaning in Michiana
Location within Michiana matters more than most people expect.
A white vinyl fence in an open, sunny yard in Osceola with good airflow might go two years between professional cleanings and stay largely white. That same fence sitting in a wooded lot near Juday Creek in Granger, or backing up to a retention pond in Goshen, might need attention every twelve months. Shade, moisture, and organic material in the air are the three accelerants, and Michiana has plenty of all three depending on where you live.
The Indiana lakeshore communities are a particular case. Homeowners near Long Beach or Hudson Lake often call us earlier in the season than inland customers because elevated humidity near water speeds algae growth noticeably. If your fence faces water or sits under a mature tree canopy, plan on annual cleaning. Open, sunny locations with good airflow can often go every other year.
Timing matters too. The best window for vinyl fence soft washing in Indiana is late spring through early fall, when temperatures stay consistently above 50 degrees so the solution can dwell and work properly. We run fence jobs in Mishawaka, Elkhart, and Goshen from May through October. Call us in late September or early October and we can usually still fit you in before the season closes.
DIY vs. Hiring a Pro
| Factor | DIY / Rental | Double A Power Washing |
|---|---|---|
| Pressure on vinyl surface | 1,500 to 2,500 PSI from a typical consumer washer. Abrades surface texture over time. | Under 100 PSI at the surface. No abrasion, smooth surface preserved. |
| Algae and mold removal method | Physical force displaces visible growth but leaves root biology behind. | Surfactant chemistry kills the organism at the root, not just the surface film. |
| Effect on regrowth timeline | Surface scratches from pressure give algae new anchor points. Regrowth is often faster each season. | Smooth surface preserved. Algae has fewer places to grip, so results last longer. |
| Risk to nearby plants and lawn | Runoff from cleaning concentrates near the fence base with no mitigation. | Plants soaked with clean water before and rinsed after. Standard practice on every job. |
| Time on site | Variable, often requiring multiple passes to match what one application of surfactant does. | Most residential vinyl fence jobs complete in under two hours. |
| Surface damage risk | High at pressure washer PSI. Can crack or warp vinyl panels and void the manufacturer warranty. | Low pressure by design. No cracking, warping, or surface etching. |
Pro Tip: Trim back any shrubs or vines touching the fence panels before we arrive. Plant contact keeps the vinyl damp longer and gives mold a direct path onto the surface. A few inches of air gap makes a real difference in how long the fence stays clean after we leave.
What We Clean and What We Do Not
We want to be direct about this because we get asked regularly.
Double A Power Washing cleans vinyl fences only. We do not clean wood fences, and we do not apply any stain, sealer, or treatment to any fence surface after cleaning. Vinyl does not need sealing and we do not offer it. If you have a vinyl fence with vinyl or composite fence caps and rails, we can clean the whole structure. If your fence is wood, we are not the right call and we will tell you so upfront rather than take a job we should not.
Chain link and metal fences are also outside what we do for residential fence cleaning. Our soft wash chemistry and low pressure method is calibrated for vinyl surfaces, and we stick to what we do well. You can see the full scope of our vinyl fence cleaning service on our site if you want the detail before you call.
Looking for more than fence cleaning? We also offer house washing, concrete cleaning, roof cleaning, and gutter cleaning throughout the Mishawaka area.
Why Choose Double A Power Washing?
Double A Power Washing has been cleaning exterior surfaces in Michiana since 2019. We are PWNA members, BBB A+ accredited, and fully licensed and insured. Our crew runs a 24-volt soft wash system built specifically for low pressure application on vinyl and other delicate surfaces. We do not rent equipment or improvise the chemistry. Every fence job uses the same calibrated approach we have dialed in over years of Michiana summers.
We are also honest about what we take on. Vinyl fences only. If a job is not a fit, we say so before we schedule, not after we show up. Customers in Goshen, Granger, and Mishawaka know they can count on that straight answer from us, and we take that expectation seriously.
What Our Customers Say
“Double A did an amazing job on our house. It had some major areas of grime which have been eliminated and look great. They were timely and thorough. We are very happy with their work and wouldn’t hesitate to use them again.”
— Harold Kantowski, Google Review
Frequently Asked Questions
Why is my white vinyl fence turning green or gray?
The green color is algae. The gray or black streaking is usually mold or mildew. Both are living organisms that root into microscopic surface texture on the vinyl and feed on moisture and organic debris like pollen, dust, and leaf particles. Michiana’s humid summers accelerate growth significantly, especially on panels that face north or sit in shade. These organisms do not wash away with water alone. They need a chemistry based approach that actually kills the biology rather than just moving the visible film.
Is soft washing safe for vinyl fence panels and posts?
Yes. Soft washing applies solution at very low pressure, well under 100 PSI at the surface, so there is no risk of cracking, warping, or abrading the vinyl. The surfactant chemistry is diluted to a concentration that is effective on algae and mold without damaging the vinyl finish or the landscaping around the fence. We soak nearby plants with clean water before we start and rinse them again after. Vinyl is actually one of the best surfaces to soft wash because it responds well to the chemistry and holds up to repeated professional cleanings without degrading.
Do you only clean vinyl fences? What about wood or chain link?
We clean vinyl fences only. We do not clean wood fences, and we do not offer staining, sealing, or any wood treatment. Chain link is also outside what we do for residential fence cleaning. Our soft wash method and chemistry is calibrated specifically for vinyl surfaces, and we focus on the work we do well rather than taking on every type of fence job that comes along.
How often should I have my vinyl fence professionally cleaned?
For most Michiana homeowners, every one to two years is the right range. Fences in shaded yards, near water, or under mature tree canopy tend to need annual attention. Fences in open, sunny locations with good airflow often go two years before regrowth is noticeable. If you have been pressure washing the fence yourself and it seems to green up faster every year, that is a sign the surface has been abraded. Soft washing can help reset the cycle.
Will soft washing remove the artillery fungus spots on my vinyl fence?
Artillery fungus, those tiny dark brown or black dots that look like specks of tar, is one of the most stubborn things we encounter on vinyl fences. Soft washing can improve the appearance and remove surface level deposits, but deeply embedded artillery fungus that has bonded to the vinyl over multiple seasons may not come fully clean. We will tell you honestly before we start what we expect to be able to remove. In most cases we make significant improvement, but we do not promise complete removal on vinyl that has been exposed to artillery fungus for years.
Another summer of fighting the same green fence is a problem with a real fix. Our crew serves Goshen, Elkhart, Mishawaka, Granger, and communities across Michiana, and we can tell you after a quick look whether soft washing is the right move for your fence and exactly what to expect from the results.
Give us a call at (574) 221-8400 or request a free estimate at doubleapowerwashing.com. Most estimates come back within one business day, and we can usually get a fence job on the schedule within a week or two during the season. The sooner you call, the sooner the green stops coming back.
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