Windows are the surface your customers judge before they're through the door, and the one most likely to be missing from your cleaning contract. Plenty of janitorial scopes say 'interior glass as needed,' which in practice means nobody has decided who does it or how often.
Window cleaning is worth scoping deliberately, because the exterior and interior halves of the job have almost nothing in common — different crews, different equipment, different frequencies, and very different cost drivers.
Interior and exterior are two different jobs
Treating them as one line item is the reason window bids come back so inconsistent.
- Interior glass is largely a janitorial task. It's fingerprints, smudges, and entry-door traffic, reachable from the floor, and it can usually ride along with the regular cleaning crew on a defined rotation.
- Exterior glass is a specialty job. It depends on building height and ground access, needs specific equipment, is weather-dependent, and is priced off access difficulty far more than glass count.
- Partition and interior storefront glass sits between the two — floor-reachable like interior work, but high-visibility enough that it usually deserves its own stated frequency rather than 'as needed.'
What Utah does to glass
The Wasatch Front is genuinely harder on windows than a lot of markets, and the reasons are seasonal:
- Winter inversion deposits a fine, greasy particulate film that ordinary rain doesn't rinse away — it needs washing, not weather.
- Sprinkler overspray is the one that does permanent damage. Utah's hard water leaves mineral deposits on ground-floor glass, and left long enough those deposits etch the surface. At that point cleaning stops working and you're looking at restoration or replacement.
- Spring pollen and landscaping dust bind to that mineral residue and make it visibly worse.
- Construction and road dust, especially along growth corridors, coats exterior glass faster than most owners expect.
- Summer heat means solution can dry on the glass before it's squeegeed, which is why hot-afternoon exterior work tends to leave streaks and is better scheduled early.
How often, by building type
Frequency follows visibility and exposure more than square footage:
- Retail and storefront — the highest standard, because the glass is the storefront. Monthly exterior is common, with interior entry glass handled far more frequently by the nightly crew.
- Multi-tenant office — quarterly exterior is a typical baseline, with interior glass and partitions on the janitorial rotation.
- Medical and dental — interior glass and entry doors need frequent attention for appearance and infection-control optics; exterior tends to follow the office cadence.
- Auto dealership showrooms — the most demanding case on this list. Showroom glass is effectively part of the product display, and most dealerships want it handled far more often than a standard office.
- Industrial and warehouse — lowest frequency for the bulk of the building, but office and reception areas within it should be scoped to office standards rather than plant standards.
What actually drives the access cost
On exterior work, you're mostly buying access rather than cleaning. The drivers:
- Building height and how many stories are reachable from the ground with a water-fed pole versus needing a lift or rope access.
- Ground conditions — landscaping, planters, parking, and grade changes that determine whether equipment can actually get to the glass.
- Obstructions like awnings, signage, screens, and architectural features that slow every pane.
- Scheduling constraints — whether the work can run during business hours or needs early mornings, evenings, or weekends to avoid disrupting customers.
- Weather windows, since exterior work is seasonal and a freeze or a storm moves the schedule.
- Glass condition on arrival — heavy mineral spotting takes specialized treatment and is a different job from routine washing.
Scope it so the bids compare
Window quotes vary wildly because the scopes behind them do. Tighten these and the spread collapses:
- State interior and exterior separately, each with its own frequency. Never let 'windows' sit as a single undefined line.
- Count and describe the glass — storefront panes, upper stories, interior partitions, entry doors — rather than giving a square-footage total.
- Say explicitly whether frames, sills, and tracks are included. This is the single most common source of 'I thought that was included.'
- Name the access constraints you already know about, so nobody prices the job from the parking lot and revises later.
- Ask whether hard-water spot removal is in scope or quoted separately — on Utah ground-floor glass this matters more than anywhere else.
- Decide what rides on the janitorial contract versus what's booked as periodic specialty work, and get both priced.
The building-care case for windows is simple: it's the cheapest visible upgrade you can make to how your facility reads, and the one maintenance item where deferring long enough turns a cleaning problem into a replacement problem.
