What Professional Window Cleaners Use on Commercial Glass
The cleaning solution, tools and access equipment professionals use on commercial glass, what they never use, and what to ask a contractor before work starts.
Guide
Commercial Window Cleaning by Building Height
Height decides how your glass gets cleaned. It sets the access method, the access method sets the labor per pane, and above seven stories it brings roof anchors and OSHA requirements onto the owner's side of the table. This guide covers each height tier, what a compliant scope must include, and who is responsible for what.
Access method by building height
Find your building's row. Height sets the access, the facade shapes the plan, and the roof decides what is possible above seven stories.
| Height tier | Typical access | Facade and glass | Roof equipment needed |
|---|---|---|---|
| Storefront (1-3 stories) | Hand cleaning and pure-water poles from the ground | Storefront, entrance and door glass | None |
| Mid-rise (4-7 stories) | Water-fed poles, aerial lifts and ladders | Mixed elevations, lobby and tenant glass | None. Access is from the ground or a lift |
| High-rise (8-15 stories) | Rope descent and swing stages, worked from the roof down | Full facade and curtain wall | Certified roof anchors, confirmed in writing by the owner |
| Tower (16+ stories) | Rope descent and swing stages, set by anchor layout and height | Curtain wall, atriums and skylights | Certified roof anchors. Rope descent is limited to 300 feet above grade unless other means are not feasible |
Atriums, skylights and setbacks need specialty access at any height, and the walkthrough confirms the plan. Anchor and height requirements: OSHA 29 CFR 1910.27.
Window cleaning by building height
01
Storefront (1-3 Stories): Ground-Level Pole and Hand Cleaning
Pole and hand cleaning from the ground. Frequent visits, low cost per visit, one standard at every location.
Read the guide02Mid-Rise (4-7 Stories): Water-Fed Pole, Lift, and Ladder Access
Pole, lift and ladder access for office and managed buildings. Quarterly baseline, monthly for lobbies.
Read the guide03High-Rise (8-15 Stories): Rope Descent and Suspended Access
Rope descent and swing stage access from certified roof anchors. Planned once or twice a year.
Read the guide04Tower (16+ Stories): Anchor-Dependent Access and Scheduling
Access set by the roof: certified anchors, height limits and a planned drop schedule, documented end to end.
Read the guideWhat a compliant scope of work must specify
A scope that only says "clean the windows" invites a low bid and a bad outcome. A compliant scope spells out:
- Building and elevations. Height, number of elevations, and any atriums, skylights or setbacks.
- Glass count and sides. Approximate panes, and exterior only or inside and out.
- Access method per elevation. Pole, lift, rope descent or swing stage.
- Inclusions. Glass, frames and sills as standard. Screens, tracks, hard-water removal and post-construction cleans as named add-ons.
- Frequency. Visits per year for the facade, and separately for high-traffic glass.
- Safety plan. A site-specific safety plan for any at-height work.
- Anchor documentation. For rope descent, the owner's written confirmation that each anchorage is inspected and certified, per OSHA 29 CFR 1910.27.
- Insurance. General liability and workers comp, with a certificate of insurance naming the property.
- Workforce. Whether the crews are the vendor's W2 employees or subcontractors.
With every bid priced against the same scope, you compare line by line, not on the total.
Who is responsible for what
Work at height splits responsibility between the building and the contractor. Knowing the split keeps a job from stalling on the roof.
| Area | Property manager or owner | Contractor |
|---|---|---|
| Roof anchors | Identify, test, certify and maintain each anchorage. Give the contractor written confirmation before rope descent work. | Verify anchors before any drop. Use no anchorage without the owner's written confirmation. |
| Safety | Share roof access requirements and known building hazards. | A site-specific safety plan, certified technicians and inspected equipment. |
| Insurance | Require a certificate of insurance naming the property. | Carry general liability and workers comp, and provide the certificate. |
| Operations | Roof access, tenant notice and the ground-level areas below the work. | Schedule, crew assignment and a clear work plan. |
| Records | Keep anchor certifications and vendor documents on file. | Provide inspection, certification and safety documentation. |
The anchor side does not have to be yours to manage. Through its long-time anchor partner, S&K installs, inspects, load tests and certifies anchor systems and hands you the records. See anchor installation and inspection and the roof anchor and fall protection compliance guide.
How often, by building class
| Building and glass | Typical frequency |
|---|---|
| Storefront and ground-floor retail | Weekly, bi-weekly or monthly |
| Class A office and managed commercial real estate, exterior | Quarterly |
| Office lobbies, atriums and busy entrances | Monthly |
| Office interior glass | Quarterly or semi-annual |
| High-rise and tower facades | Once or twice a year, on a planned program |
What pushes frequency up:
- Nearby construction, highways or rail
- Heavy tree cover
- Irrigation overspray, which leaves hard-water minerals that bond to glass and etch it
How the year runs:
- Spring: post-winter facade and window cleaning, and a restoration assessment.
- Summer: peak season for high-rise and rope-access work.
- Fall: pre-winter cleaning and annual roof anchor inspection and certification.
- Winter: interior and atrium glass, and budgeting next year's program.
Your local team tailors the cadence to your building. Build a full program in the annual maintenance planning center.
Why property managers choose S&K at every height
- Every height, one partner. Storefront routes to tower facades, plus the anchor work that keeps high-rise access compliant.
- 100% W2 crews. Trained, insured employees, never subcontractors.
- Documented safety. Site-specific safety plans, technicians certified before any at-height work, and equipment inspected on a routine schedule.
- Anchors handled. Installation, inspection, load testing and certification through our long-time anchor partner, with records for ownership, insurers and auditors.
- One contract across your portfolio. One point of contact and the same standard in every market, delivered by local crews.
Start with a ballpark from the pricing calculator, or ask for our safety documentation and certificates of insurance.
All Window Cleaning articles
What Building Access Equipment You Already Have, and How It Changes the Job
Roof anchors, davit bases or a permanent platform: what is already on your roof decides how your facade can be cleaned. Here is how to find out, and why it matters.
Curtain Wall vs. Punched Window Facades: How Glazing Type Changes the Cleaning Approach
A continuous glass curtain wall and a masonry wall with punched windows clean very differently. Here is how glazing type changes access, time and cost.
Hard Water and Mineral Staining on Commercial Glass: Cleaning vs. Restoration
Spots that routine cleaning will not lift are a warning. Here is how to tell whether commercial glass needs cleaning or restoration, and how to stop it happening again.
Staging, Parking, and Sidewalk Closure Requirements for High-Rise Window Cleaning
High-rise window cleaning needs space on the ground as well as the roof. Here is what to plan for safety zones, sidewalks, parking and staging before the first drop.
How Often Should a 4+ Story Commercial Building Have Its Windows Cleaned?
Mid-rise buildings usually run quarterly. High-rise and tower facades run once or twice a year. Here is what moves your building up or down.
Interior vs. Exterior Window Cleaning Scope: What Leases Require and Tenants Expect
Exterior glass is usually the landlord's job. Interior glass depends on the lease. Here is how to scope both sides without gaps or double billing.
Rope Descent Systems vs. Suspended Scaffolding: What Determines the Method for Your Building
Rope descent and swing stages both reach high-rise glass from the roof. Height, anchors, facade shape and scope decide which one fits your building.
Water-Fed Pole Cleaning: How High It Actually Reaches on a Commercial Facade
Water-fed poles clean upper-floor glass from the ground. Here is where they fit, what limits their reach on a real facade, and when lifts or rope access take over.
Why Window Cleaning Bids Vary So Widely for the Same Building
Three bids, three very different numbers, one building. Here is what drives the spread, and how to compare window cleaning bids on the same footing.
Window Cleaning Frequency by Asset Class: Class A, B, and C Expectations
Class A buildings are held to a higher visual standard than Class B and C. Here is how asset class shapes window cleaning frequency, and where the floor is.
Window Cleaning During Occupancy: Safety and Liability Responsibilities of the Property Manager
When a contractor works at height on your building, their safety record becomes your liability. Here is what the property manager is responsible for.
What a Commercial Window Cleaning Scope of Work Must Specify
A vague scope gets a low bid and a bad outcome. These are the items a commercial window cleaning scope of work has to spell out, in order.
Coordinating Window Cleaning With Tenant Operations: Notification, Access, and After-Hours Work
Window cleaning in an occupied building runs on coordination. Here is what tenant notices should say, how to handle access, and when after-hours work makes sense.
Weather, Seasonality, and Scheduling Risk in Multi-Story Cleaning Contracts
Wind, rain and peak season decide when multi-story glass can actually be cleaned. Here is how to plan for it, and what to put in the contract.
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