TL;DR
Exterior window cleaning is an access job as much as a glass job. It typically covers the outside face of the glass, the exterior frame and sill, and often the screens as a paired line item. Height governs who should do it: ground-floor glass is a reasonable DIY task, while second-story and above belongs to a provider with the right equipment and insurance.
What the Scope Usually Includes
The core work is straightforward. Where it gets specific is around what surrounds the glass.
Glass, outside face. Washed with a soap solution, squeegeed in overlapping passes, and detailed at the edges with a dry cloth.
Exterior frame and sill. Wiped or brushed to remove pollen, cobwebs, and grime, which otherwise runs back onto clean glass with the first rain.
Screens. Usually a paired add-on rather than an assumption, because they have to come out and be handled separately.
Sash tracks and weep holes. The small drainage openings at the bottom of the exterior frame block with debris, which causes water to sit in the track. Clearing them is quick and genuinely useful.
Commonly excluded: window wells, gutters, roof-level glass, skylights, second-story glass where no safe ladder setting exists, and any glass requiring rope access or a lift.
Who Should Do Exterior Windows?
Ground-floor windows reachable from level ground are a reasonable homeowner task with a squeegee and a bucket. Anything above the first floor should go to a provider with proper ladders, stabilizers, or a water-fed pole system, plus liability and workers compensation insurance. Ladder falls are among the most common serious injuries in home maintenance, and the height at which the risk changes is lower than most people assume.
That is the honest answer, and it is not a sales position. A second-story window over a sloped garden bed is where people get hurt.
Ladder and Access Rules That Matter
If you are doing ground-floor glass yourself, or evaluating whether a provider is working safely, a few standards apply.
An extension ladder is set at roughly a four-to-one ratio -- one foot out from the wall for every four feet of height. It should extend past the top contact point, be footed on firm level ground, and never be stood on a slope, a deck rail, or anything improvised.
Nobody should be reaching sideways from a ladder. The rule of thumb is that your belt buckle stays between the rails. Overreaching is the single most common cause of ladder falls, and it happens exactly when someone is trying to finish one more pane rather than move the ladder.
Power lines near a window rule out a metal ladder entirely. Wet ground, moss, and soft soil are all reasons to stop.
Many professional providers now use water-fed pole systems for upper-story work: filtered water, a brush on a telescoping pole, and no ladder at all. The glass is scrubbed and rinsed with purified water and left to dry without squeegeeing, because purified water leaves no minerals behind. If you are comparing quotes, asking what method a provider uses on upper floors tells you a lot.
Hard Water, and What Cleaning Cannot Undo
The most common exterior window complaint is spotting that will not come off, and it is worth understanding what is happening.
Sprinkler overspray is the usual cause. Irrigation water carries dissolved minerals, and when it lands on hot glass and evaporates it leaves those minerals bonded to the surface. Over months the deposit thickens. Over years, it etches.
Deposits can often be removed with a dedicated mineral treatment and careful work. Etching cannot -- it is physical damage to the glass surface, and the only remedies are professional glass restoration, which is its own trade, or replacement.
The preventive fix is redirecting the sprinkler head, which costs nothing and saves the glass.
Two other things cleaning does not resolve: a failed insulated glass seal, which shows as haze inside the pane and needs a glazier, and scratches from previous abrasive cleaning, which are permanent. The wider technique context is in the glass and mirror care guide.
Timing and Weather
Exterior glass has a right and a wrong day.
Cleaning in direct sun on a hot day is the most common cause of streaking, because the solution dries on the glass before it can be removed. Overcast days and early mornings produce better results with less effort.
Freezing weather is a genuine problem: solution freezes on the glass and on the ladder. Cold-weather window cleaning uses specific additives and is generally left to providers who do it routinely.
Seasonal timing follows pollen and weather. Late spring, after the heaviest pollen has fallen, and early autumn, before winter weather sets in, are the two common windows. In wetter climates, autumn cleaning is often more about clearing the frames and weep holes than the glass itself.
Two exterior cleans a year suits most homes. Homes near unpaved roads, agriculture, construction, or heavy tree cover often want three.
Bundling and Sequence
The order matters if you are booking more than one service.
Exterior windows come after any exterior surface washing, not before -- house washing sends dirty water and detergent across the glass, which undoes a fresh clean. If you are having siding or a roof cleaned, book the windows afterward.
Screens should be handled in the same visit, because a clean window behind a dirty screen still looks dirty from inside. That work is covered in window screen cleaning.
Interior and exterior are usually booked together for the same reason -- the view only improves when both faces are done, which is why interior window cleaning is nearly always quoted alongside.
What to Ask For and What to Confirm
Exterior window quotes are built on window count, story height, glass type, and access, so give accurate information and expect specific questions.
Confirm in writing: the number of windows and panes counted, which stories are included, whether screens are in or out, whether frames, sills, and tracks are covered, what method is used above the ground floor, and how hard water deposits are handled and priced.
Two questions worth asking every provider: whether they carry liability and workers compensation insurance, and what they do about any window they judge unsafe to reach. Clear answers to both are a good signal. If you are comparing what a dedicated crew offers, the window cleaning services page is a reasonable starting point.
Finally, be realistic about outcome on older glass. A twenty-year-old window with sprinkler etching will be clean but not new, and a provider who says so is being straight with you.
FAQ
How often should exterior windows be cleaned?
Twice a year suits most homes -- typically late spring after heavy pollen and early autumn before winter. Homes near unpaved roads, farmland, construction, or heavy tree cover often benefit from three times a year. Coastal properties dealing with salt spray usually need more frequent attention.
Can hard water spots be removed from windows?
Deposits sitting on the glass can usually be removed with a dedicated mineral treatment and careful work. If the minerals have etched the glass surface after years of sprinkler exposure, that damage is permanent and needs professional glass restoration or replacement. Redirecting the sprinkler is what prevents it.
Is it safe to clean second-story windows myself?
It is where most window-cleaning injuries happen. Ladder work above the first floor requires correct setting, firm level ground, no sideways reaching, and awareness of power lines. Most homeowners are better served by a provider with stabilizers or a water-fed pole system, plus the insurance to cover the work.
What is a water-fed pole system?
It is a telescoping pole with a brush head fed by purified water, used to clean upper-story glass from the ground. The purified water carries no dissolved minerals, so the glass can be left to air dry without spotting or squeegeeing. It removes the ladder from the job entirely.
Should windows be cleaned before or after the house is washed?
After. Exterior house washing sends dirty water and detergent runoff across the glass, so windows cleaned first will need doing again. Sequence any siding, roof, or gutter work first and book the window cleaning once that is finished.
Why do my windows streak when I clean them outside?
Usually because they were cleaned in direct sun, so the solution dried before it could be removed. Too much soap and a squeegee blade that is not wiped between passes cause the rest. Work on an overcast day or early morning, use less product, and wipe the blade after every pull.
Exterior window pricing is driven by count, height, and access more than by anything else, so a quick look settles it. Otesse is local, background-checks its crews, prices upfront with no hidden fees, and books online -- see home cleaning services or get a quote. Every home is different, so the real number depends on size, condition, and what you want covered.