Window Cleaning After Pressure Washing — Order Matters

I get the call once a month in summer: a homeowner who paid for window cleaning two weeks ago, then paid for pressure washing this week, and now the windows look worse than before either service. Or the reverse. Pressure washed the house first, then the window cleaning crew showed up and the windows came back streaked because the frames had not fully dried. After ten-plus years running Lawn Harmony across Pickaway, Franklin, Fairfield, Ross, and Fayette counties, I can tell you the order matters more than the products, and the homeowner who sequences the work right saves money on every visit going forward.

Here is how I run exterior cleaning when both services are on the table.

Should I pressure wash before or after window cleaning?

Pressure wash first, then clean the windows. Every time. Pressure washing the siding, soffits, and gutters kicks loose dust, mildew spores, and cleaning solution that will land on the glass. Clean the windows before the wash and you have just paid someone to clean glass that is about to be re-soiled.

The right sequence on a typical Central Ohio house:

• Soft wash roof and gutters
• Pressure wash siding, soffits, fascia
• Pressure wash hard surfaces, driveway, walks, patios
• Wait at least twenty-four hours for everything to dry
• Clean windows, screens, and frames last

On a Grove City Cape Cod last August, the homeowner had three different crews scheduled in the wrong order. Window cleaner Tuesday, pressure washing Thursday, window cleaner had to come back Saturday for free. He was not happy with anybody. We could have saved him a Tuesday visit and a re-do.

Why do windows streak after pressure washing?

Two reasons. The first is hard water spotting from the pressure wash itself. Most pressure washing rigs run on municipal or well water, and Ohio water is moderately hard pretty much everywhere outside a few softening districts. When that water hits glass and air-dries instead of being squeegeed off, the minerals leave a haze. You can wipe it with paper towel and Windex and it will streak forever because the mineral is fused to the glass surface.

The second is residue from the cleaning solution used on the siding. Sodium hypochlorite, the active ingredient in most house wash mixes, leaves a salt film when it dries. On glass that film picks up dust and starts streaking the next time it rains.

The fix is a proper window cleaning pass after the wash, using a real squeegee and a dedicated glass cleaning solution, not just a wipe-down with a microfiber. On heavy hard water spotting you sometimes need a one-time mineral remover treatment, and after that, regular maintenance keeps the glass clear.

What is the right way to clean exterior windows?

For exterior glass on a single-story home, I use a strip applicator, a quality squeegee, and a mild dish soap solution at maybe a teaspoon per gallon of water. Wet the glass top to bottom, squeegee from the top corner down in overlapping strokes, wipe the squeegee edge between strokes, and detail the edges with a clean lint-free cloth.

Two-story windows and any third-story dormers I do with a water-fed pole system. Purified water through a brush head on a carbon fiber pole. The purified water dries spot-free without any squeegee work because there are no minerals in the rinse to leave residue. That is the same system most professional window cleaning crews use now, and it is what makes upper-floor windows possible without ladders for every pane.

On a Canal Winchester two-story I cleaned last fall, the homeowner had been paying his neighbor’s teenage son to do windows with a ladder and a bottle of Windex. Every window had streaks, the screens were torn from the ladder rest, and the sills were scuffed up. Switched him to the water-fed pole approach, knocked out the whole house in about ninety minutes, and the windows looked better than the day the house was built.

How long should I wait after pressure washing to clean windows?

Twenty-four hours minimum, forty-eight is better. The siding, frames, and especially the window weep holes need time to drain and dry. Clean windows on wet frames and the water trapped in the frame channels will weep out over the next few days and streak the new clean glass.

Weep holes are the little drainage slots at the bottom of vinyl window frames. Pressure washing forces water into them, and that water has cleaning solution mixed in. It comes out slowly. Give it time.

If you absolutely have to do everything in one visit, do the wash early in the morning on a hot dry day, finish the wash by noon, let it bake for four to six hours in direct sun, and do the windows in late afternoon. You can get away with it. Not ideal.

What about screens?

Screens almost always need to come off the windows for both pressure washing and window cleaning. I pop them, set them on a tarp, hose them clean with a garden nozzle, let them air-dry while I am working, and put them back at the end of the visit. Pressure washing screens in place blasts dust through them and into the inside of the window track, which then drains back onto the clean glass.

Aluminum screens that are bent or fraying at the corners get noted on the work order. We do not try to bend them back to true on site. Replacement screens are 25 to 60 dollars per panel through any local hardware store, and most homeowners would rather know than not know.

On a Lancaster ranch last spring, half the screens had been torn by the customer’s dog. We washed them anyway, set them on the back porch to dry, and left a note for the homeowner with the count and condition. She replaced six of them the following week. The other six lasted another summer.

How often should exterior windows get cleaned in Central Ohio?

Twice a year is the standard for homes that are not surrounded by trees or busy roads. Once in spring, after pollen drop, and once in fall, after leaves and before the cold weather sets in. Homes under heavy tree cover or close to gravel roads, farm fields, or industrial corridors usually need a third visit in summer.

OSU Extension materials on home maintenance call out the same twice-a-year cadence for most exterior surfaces, and pairing windows with the spring and fall pressure washing visits is the efficient play. Same trip, same crew, single mobilization fee.

On a Chillicothe property near a gravel road we run a three-visit schedule, spring, summer, and fall, because the road dust films the windows so fast the homeowner cannot see clearly through them by August. That is unusual, but it is a real situation in some of the rural Central Ohio service areas.

Should I clean my own windows or hire it out?

Single-story homes with eight to fifteen windows are reasonable DIY territory if you have a couple of free hours and decent technique. Buy a real strip applicator and squeegee, not the rubber-blade thing from the household cleaning aisle. Total kit cost is around 40 dollars.

Two-story homes are where most DIYers run into trouble. Ladders, awkward reach over shrubs, and the fatigue factor of working overhead all add up to streaks, missed spots, and the occasional fall. Hiring it out for a two-story typically runs 150 to 300 dollars for exteriors only, more if interiors are included. Add it to a pressure washing package and the per-window cost drops because the truck is already on site.

Common window cleaning mistakes I see

• Cleaning the windows before the pressure washing instead of after
• Using paper towels, which shed lint and streak on any glass
• Cleaning glass in direct sunlight, where the cleaner evaporates before you can squeegee
• Skipping the screens and putting dirty screens back over clean glass
• Using ammonia-based cleaners on tinted glass or low-E coatings
• Standing on a window sill or AC unit instead of using a real ladder

The ammonia one is worth a flag. Many older window cleaners are ammonia-based, and most modern energy-efficient windows have a low-emissivity coating on the inside that ammonia can damage over time. Stick to a dish-soap mix or a window-specific solution that calls out low-E compatibility.

Quick exterior cleaning sequence checklist

• Roof, gutters, siding, then hard surfaces
• Wait twenty-four to forty-eight hours for everything to dry
• Pop screens, wash them on a tarp, dry, replace
• Use a strip applicator and squeegee on single-story, water-fed pole on upper floors
• Schedule windows after pressure washing, not before

Want a written quote?

If you are setting up exterior cleaning and want the sequence handled right, Lawn Harmony Landscaping coordinates pressure washing and window cleaning across Central Ohio. We are licensed, insured, and locally owned and operated.

Call (614) 425-9789 or email LawnHarmonyOhio@gmail.com for a free quote. Our pressure washing service covers siding, soffits, gutters, and hard surfaces, and we can pair it with window cleaning so the sequencing is right the first time. For homes getting a full exterior refresh, we also handle mulch install and hedge trimming on the same visit.

Service area: Circleville, Columbus, Grove City, Pickerington, Canal Winchester, Groveport, Lancaster, Baltimore, Chillicothe, Washington Court House, and Jeffersonville.