Power Washing at a property in Crystal Lake on Deerhaven Drive. Completed by our Barrington team.
— Barrington crew
Concrete surfaces in McHenry County take a beating over a long winter — freeze-thaw cycles open the pores, and by the time the season turns, mildew has a foothold and black streaks are working their way across the slab. That was exactly what we found at this Crystal Lake property: a concrete patio and connecting walkways carrying the kind of deep-set biological staining that a straight pressure rinse won't touch.
We started by presoaking the surfaces with a cleaning solution and letting it dwell — giving it time to break down the mildew and loosen the black streaking before we brought the surface cleaner across. The dwell time mattered here; cutting that step short would have meant pushing the staining around rather than lifting it. Once the solution had done its work, we ran the surface cleaner methodically across the patio and walkways, working section by section until both areas were done. Invoice went out the same day.
Crew on this job
Davey
Davey joined My Window Washing in 2025, but he brings more than 5 years of hands-on experience in window washing, gutter cleaning, and power washing. He’s cheerful, polite, professional, and always ready to help customers with a smile, good advice, and a can-do attitude. When he’s not making homes look cleaner and brighter, Davey enjoys creating content and checking out the latest gadgets. But honestly, who doesn’t love a good gadget these days?
Want a quote for your home?
This property is served by our Barrington office. Same-day and next-day appointments often available.
Call (847) 715-9493Showing the home's condition before our team arrived, and the result after the power washing was complete.
Before
After
Our Barrington crew filmed this power washing on site at a property in Crystal Lake, IL.
The clip walks through how we approached the property — equipment setup, method on each side of the glass, and the tidy-up at the end.
Watch on YouTube118 Barrington Commons Ct Ste 222, Barrington IL 60010
Our Barrington crew also serves these areas.
Common questions from Crystal Lake homeowners researching Power Washing.
For a patio and walkway job in Crystal Lake, expect to pay in the $250–$450 range depending on total square footage and surface condition. This particular project came in at $370, which covered both the patio and walkways including a soap treatment to cut through heavy mildew and black streaks. Heavily soiled surfaces or larger areas will push toward the higher end of that range.
A patio and walkway job of this scope typically runs two to three hours for a two-person crew. Extra time gets added when surfaces have stubborn mildew or organic staining that requires a soap pre-treatment and dwell time before rinsing, which was the case here. Factoring in setup and cleanup, most residential hardscape jobs are wrapped up in a single visit.
The service covers a full surface wash of the patio and all walkway sections, including pre-treatment with soap where mildew, algae, or black streaks are present. On this job, the soap application was necessary to fully lift the biological staining before pressure rinsing. We clear the area of loose debris beforehand and do a final rinse to leave the surfaces clean and residue-free.
Standard concrete patios and walkways handle pressure washing well when the correct nozzle and PSI are used — blasting too close or at too high a pressure can etch or pit the surface. We adjust pressure based on the material and use a soap treatment when needed, as we did here to handle mildew and black streaks without overworking the concrete. Pavers and older concrete may call for a lower-pressure soft wash approach, which we assess on-site. For a quote, call our Barrington team at (847) 715-9493.
Served by our Barrington office — same and next-day appointments often available
Professional window washing, gutter cleaning & power washing across Chicago and suburbs since 2003.
