Commercial glass care
Exterior Window Cleaning for Commercial Buildings
What outside glass cleaning involves on storefronts, offices and low-rise buildings, how often each needs it and what shortens the cycle in Southern California.
The short answer
Exterior window cleaning removes dust, pollen, salt film, hard water spotting and bird droppings from the outside face of a building's glass, frames and sills. On commercial property it is done with an applicator and squeegee or with a water-fed pole that rinses glass with purified water. Storefronts usually need it weekly or more often, while offices and other low-rise buildings tend to run quarterly or twice a year, adjusted for dust, coastal air and sprinkler overspray.
What exterior window cleaning covers
A proper exterior clean treats the whole opening, not just the middle of the pane. Frames, mullions and sills hold the grit that streaks freshly cleaned glass the first time the wind picks up, so they are wiped or rinsed along with it. Entry doors, sidelights, storefront glass and the glass on monument signs and directories are usually part of the same visit.
The scope should also say which glass is out of reach. Tall facades that need suspended platforms or rope access are specialist work with engineered anchors and their own safety rules, and they are quoted separately from ground-level and low-rise glass.
Squeegee or water-fed pole: two ways to clean outside glass
Most commercial crews use both methods, choosing by the glass in front of them. The squeegee still gives the sharpest finish up close; the pole is faster and safer for second and third stories that would otherwise need ladders.
| Method | How it works | Strengths | Limits |
|---|---|---|---|
| Applicator and squeegee | Glass is scrubbed with a solution, then squeegeed and detailed at the edges | Crisp finish on storefronts, doors and detailed glass | Upper panes need ladders; slower on large areas |
| Water-fed pole | Purified water is pumped through a brush on a telescoping pole and left to dry | Reaches low-rise upper floors from the ground; cleans frames at the same time | Will not remove etched hard water stains or heavy residue |
How often to clean commercial windows
Frequency follows visibility and exposure. Glass that customers walk past at arm's length needs far more attention than upper-floor panes on an industrial office. The table gives common starting points; check the results by looking at the glass with the sun low in the sky, when film and streaks show most.
| Building type | Common frequency | What drives it |
|---|---|---|
| Retail storefronts and restaurant fronts | Weekly or every other week | Fingerprints, street dust and first impressions |
| Banks and medical offices | Monthly to quarterly | Visible entries and customer or patient perception |
| Multi-tenant offices | Quarterly | Tenant expectations and lease standards |
| Hotels and resorts | Monthly at entries, quarterly elsewhere | Guest arrival areas and view glass |
| Industrial and warehouse offices | Twice a year | Truck dust, with lower visibility |
| Coastal buildings of any type | More often than inland equivalents | Salt film that builds quickly |
Southern California conditions that dirty glass faster
Irrigation is the most common culprit. Sprinkler overspray leaves mineral spots that can etch glass if they sit for months, so adjusting sprinkler heads away from windows saves money before any cleaning starts. Along the coast, from Seal Beach and Huntington Beach to Del Mar and La Jolla, salt film dulls glass within weeks. Inland, Santa Ana winds, construction and truck traffic coat glass with fine dust.
The desert adds its own problems. In the Coachella Valley, blowing sand scratches glass if it is wiped dry, and summer heat dries solution before it can be squeegeed, so crews start early and work the shaded sides first. After a wildfire nearby, ash on windows is gritty and slightly caustic; it should be rinsed off with plenty of water before any scrubbing.
Commercial exterior window washing around open buildings
Most exterior glass is cleaned while the building is open, so planning matters. Storefronts are best done before opening, when sidewalks are clear. Work areas are coned off, wet pavement is marked, and water-fed pole runoff is kept away from doorways. In hot months, outdoor crews are covered by Title 8, section 3395, Cal/OSHA's heat illness rule for outdoor work, so water, shade and breaks are built into the schedule.
Timing with other trades helps too. Schedule window cleaning after pressure washing and landscaping, not before, and ask the landscaper to run sprinklers away from cleaning days.
How EBS handles exterior glass
EBS Maintenance cleans interior and exterior glass for storefronts and offices, taking dirt, mineral spots and residue off exterior glass that can be safely reached, either on a set rotation or for a single visit. Glass work can sit alongside janitorial, floor care and pressure washing under one program, with teams sent from the Corona office. Call (949) 375-3305 for a walkthrough; the supervisor looks at your glass, how it is reached and how often it soils, then quotes.
Related questions
Still not sure? A supervisor can answer at the walkthrough.
Request a walkthroughAll questionsCan windows be cleaned when rain is forecast?
Usually, yes. Light rain falling on clean glass tends to dry without heavy spotting, because most post-rain marks come from dirt already on the window. Crews postpone for heavy rain, strong wind or lightning, which make ladder and pole work unsafe.
Why do our windows look spotty right after cleaning?
The usual causes are tap water drying on the glass, leftover solution, or hard water stains that were already etched in. A purified-water rinse fixes the first two. Etched stains need a restoration treatment, and some will not come out completely.
Should exterior and interior glass be cleaned on the same schedule?
Not necessarily. Interior glass collects fingerprints rather than weather, so doors and partitions are often handled by the janitorial crew. It helps to clean both sides together at least once or twice a year, because smudges inside are obvious once the outside is clear.
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