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593 reviews
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Jonathan Tetik
1 day ago
They were very proficient with response time, evaluation of my Moms house, and completion of their r...
They were very proficient with response time, evaluation of my Moms house, and completion of their recommendations. I highly recommend their services, every part of the process was easy and my Mom loved what they did with her house.
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Cindy Concialdi
1 week ago
Great experience working with this company! I called they can out for an estimate this next day as p...
Great experience working with this company! I called they can out for an estimate this next day as promised. They did a great job power washing my patio. I will us them again.
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D J
1 week ago
Reliable and did a great job. My windows, siding and patio look better than they have in years!
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Cathy Mishra
2 weeks ago
Very professional and organized, fairly priced and so easy to schedule and coordinate. Thank you for...
Very professional and organized, fairly priced and so easy to schedule and coordinate. Thank you for a fabulous job on all our home windows!
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Elizabeth C
2 weeks ago
Quick response, did a great job, no mess after work was completed. Would recommend 100% !
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Valerie Gaines
2 weeks ago
Quick response to inquiry and fast scheduling and they were very efficient getting my deck power was...
Quick response to inquiry and fast scheduling and they were very efficient getting my deck power washed. Would definitely hire again.
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jimmy pagakis
2 weeks ago
Great Job, Nice people.
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Michael Dupuis
3 weeks ago
Great work and reasonable price, thanks!
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Jenna De Wit
3 weeks ago
Konstantine did a great job - he is a very hard worker and we are very happy with the results. Will ...
Konstantine did a great job - he is a very hard worker and we are very happy with the results. Will use Veco again in the future.
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DENNIS Weiss
3 weeks ago
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847-441-0034

Algae-Covered Concrete Restored — Power Washing in Evanston, IL

Moss & Algae Removed from Concrete Steps — Same-Day Service in Evanston, IL

Get a free estimate

From Green and Slippery to Clean and Safe — Here's What We Found and How We Fixed It

The Problem: Algae-Coated Concrete Steps — A Slip Hazard and Curb Appeal Disaster


When this Evanston homeowner reached out to VECO, their concrete entrance steps had turned completely green — a thick layer of algae and moss had taken over the entire surface over multiple seasons. What was once clean, sand-colored concrete had become a slippery, unsightly hazard. See the dramatic transformation in our before & after photos below, and read how our professional power washing service delivered same-day results.

 

The Problem: Algae-Coated Concrete Steps — A Slip Hazard and Curb Appeal Disaster


Evanston, IL sits just north of Chicago along Lake Michigan, and its humid, tree-lined neighborhoods create the perfect conditions for algae, moss, and biological growth to take hold on outdoor concrete surfaces. The homeowner on this job had been dealing with progressively worsening green buildup on their entrance steps for over two years.

By the time VECO arrived, the concrete was completely coated — steps that were originally a warm sand-beige color had turned uniformly green. Beyond the visual problem, the real concern was safety: wet algae on concrete steps is extremely slippery, creating a genuine fall risk for anyone entering or leaving the home, especially in wet or frosty fall and winter weather that's common in the Chicago North Shore area.

The combination of North Shore's high humidity, significant seasonal rainfall, and heavy tree canopy overhead — which keeps surfaces shaded and moist — makes power washing in Evanston, IL one of the most frequently needed exterior maintenance services in the area. Algae spores spread quickly once established, and without professional intervention they return season after season.

 

The Challenge: Removing Deep-Set Algae Without Damaging the Concrete


This wasn't a simple rinse job. The algae had been growing undisturbed for multiple seasons, meaning it had penetrated into the surface pores of the concrete rather than just sitting on top. Standard garden-hose pressure would have done nothing. An incorrect pressure setting on a consumer-grade pressure washer could have easily damaged or pitted the concrete surface — a costly mistake.

The job required the kind of calibrated approach that only comes with professional equipment and experience: the right PSI for concrete, the right nozzle angle to cut through biological buildup without etching the surface, and a proper treatment to prevent rapid regrowth. This is exactly what the VECO team is trained for.

 

Our Approach: Professional Hot-Water Pressure Washing with Algae Treatment


Our crew arrived on-site and assessed the full scope of the buildup before starting. The process we used for these Evanston concrete steps included:

- Pre-treatment application — a biodegradable algaecide solution was applied to the steps and allowed to dwell, breaking down the biological matter at the root level before pressure was applied.
- Hot-water pressure washing — we used heated water at controlled PSI, which is significantly more effective than cold water at dissolving algae, moss, and organic staining from concrete pores.
- Surface rinsing from top to bottom — methodical rinsing to push all debris downward and away from the structure, preventing residue from settling back onto cleaned surfaces.
- Post-wash inspection — every step and edge was checked to confirm complete removal before the job was signed off.

The entire process was completed in a single visit. No landscaping was damaged, and the surrounding garden bed and hose connections were protected throughout.

Choose better, choose us!

With VECO Window Washing and Gutter Cleaning, you're not just getting a service, you're embracing excellence in cleanliness and customer care.

Get a free estimate 847-441-0034

The Result, What Our Client Said, and Your Questions Answered

The Result: Concrete Restored to Its Natural Color — Slip Hazard Gone


The transformation was dramatic. What had been a uniformly green, moss-covered surface was restored to the original warm beige-tan color of the concrete — clean, bright, and safe underfoot. Every corner, edge, and riser was cleared of biological growth, including the difficult areas where the steps meet the wall where moisture tends to concentrate.

Beyond the aesthetics, the safety improvement was the most important outcome. The homeowner can now use their entrance steps without the risk of slipping — critical heading into the Chicago area's wet fall and icy winter season. The concrete surface will also hold up better over time: algae and moss hold moisture against concrete, accelerating freeze-thaw cracking. Removing it now protects the investment in the long run.


Customer Testimonial


"I honestly didn't think those steps could be saved. They had been green for so long I thought that was just how concrete looked after a few years. VECO came out and within a couple of hours they looked brand new. I couldn't believe it. Absolutely worth every penny — and they were in and out without any mess."
— Homeowner, Evanston, IL


Frequently Asked Questions — Power Washing in Evanston, IL


Q: Why do concrete steps in Evanston get green so quickly?
A: Evanston's Lake Michigan proximity creates consistently high humidity, and mature tree canopy throughout many neighborhoods keeps surfaces shaded and damp — ideal conditions for algae and moss to colonize concrete, brick, and masonry. Most homeowners see significant regrowth every 1–2 years without protective treatment. Professional power washing followed by an algaecide application is the most effective way to reset the surface and slow regrowth.

Q: Is power washing safe for concrete steps and masonry surfaces?
A: Yes — when done correctly. Professional power washing uses calibrated pressure settings appropriate for the specific surface. Concrete can handle higher PSI than wood or vinyl siding, but even on concrete, incorrect technique (wrong nozzle, too close, too high pressure) can cause surface etching or pitting. VECO's technicians are trained on proper PSI and nozzle selection for every surface type, ensuring deep cleaning without damage.

Q: How much does power washing cost in Evanston, IL?
A: The cost depends on the size and condition of the surface being cleaned. A set of concrete entrance steps like this project typically ranges from $150–$350 depending on the extent of buildup and area. Larger jobs — driveways, full exterior siding, patios — are priced accordingly. VECO provides free on-site estimates with no obligation. Call us at 847-441-0034 or request a free estimate online.


Need Power Washing in Evanston, IL or the North Shore?


If your driveway, steps, patio, or siding has started turning green, don't wait until the problem gets worse. VECO serves Evanston and the entire Chicago North Shore — from Wilmette and Glencoe to Highland Park and beyond. Our team offers same-day service and free estimates.
📞 Call us: 847-441-0034
👉 Get a Free Estimate Online
Explore all of our exterior cleaning services, or learn more about VECO and our 20+ years serving North Chicagoland.

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Reach Out for Expert Window Cleaning Services – We're Here to Assist You!