Commercial Window Cleaning: How Often NJ Buildings Need It

Street-level storefront glass usually wants commercial window cleaning every month. Office building exteriors are normally fine on 2 to 4 visits a year, with the inside glass folded into a quarterly rotation. Those are starting points, not a rule, and the thing that actually moves them is not the calendar. It is what your building sits next to.

Updated October 2026.

We get asked for the interval before we get asked for the price, usually by a facility manager who has just had somebody comment on the lobby doors. The honest answer is that two buildings of identical size on the same road can need very different schedules, and the difference is visible from the parking lot.

What actually sets the interval

Road film is the big one. A building with glass facing a busy county road picks up a grey haze of tyre and brake dust that a building set back behind a lawn simply does not. You can watch it arrive after a wet week.

Then there is irrigation. A sprinkler head that throws onto a ground-floor pane leaves hard water spotting that etches if it is left long enough, and that is the one case where stretching the schedule costs you glass rather than appearance. We flag those on the walkthrough and usually the cheaper fix is moving the head.

Construction nearby, heavy pollen in the spring, a loading dock, a drive-through lane, a smoking area by the entry: each of those pulls the interval shorter. A quiet office park with mature trees and no road exposure pulls it longer. Exposure is also why a single building can need two schedules, with the entry and the street-facing elevation on a tighter cycle than the back of the house.

Inside glass is a different job

Exterior cleaning is weather and dirt. Interior glass is people, and it soils in a completely different pattern.

Entry doors and interior partitions take fingerprints at handle height, a smear band roughly where a shoulder goes through the door, and nose and paw prints near the floor in any building with a lobby. None of that is reached by an exterior pass, and all of it is in the eye line of everybody walking in. On the buildings we clean on a recurring program, interior glass gets maintained on the regular visits and only the full exterior cleaning sits on a monthly or quarterly rotation. That split is why the inside of the glass usually costs very little to keep right and the outside is the line item people notice.

High interior glass is its own case: transoms, clerestory windows, the panes above a 2 storey lobby. Those get dusted rather than washed on a routine visit, and they need a real cleaning far less often than anything at hand height.

Where it sits in your contract

Windows are the line most often priced outside a nightly janitorial scope, which is exactly why they turn into an argument later. The crew that empties your bins is not the crew on a water-fed pole, and the scope document usually reflects that even when nobody said so out loud.

Get it written down either way. Ask for the interior and exterior frequencies as separate lines, ask whether screens, frames, tracks and sills are included or extra, and ask who is responsible for glass that needs restoration rather than cleaning, because hard water etching and paint overspray are not a cleaning problem. If your building is on a recurring program, the simplest arrangement is one vendor, one schedule and one invoice with the window rotation named on it. We go through the rest of what belongs in that document in what to include in an office cleaning contract, and the equipment and materials side is in who pays for the supplies.

What we will not do

We clean commercial buildings up to 3 stories using water-fed pole systems from the ground, which means no lift parked on your sidewalk and nobody anchored to your roof. Above that we are not the right vendor, and we will say so on the first call rather than take the work and subcontract it quietly. There is a real difference between a window cleaning company and a rope-access company, and a building owner should know which one is showing up.

Light rain does not cancel a visit. Purified water dries without spotting, and rain on clean glass is only a problem when there was dirt on the pane for it to move around. High wind is different, and we reschedule for that rather than put somebody on an unsafe pole.

If you want the specifics of what a visit covers, that is on our commercial window cleaning page. If you want to know what your building actually needs, the useful thing is for us to walk it. 10 minutes outside tells us more about your interval than any square footage number you could send us.