What's included
- Interior transom glass and frames
- Clerestory glass, frames and sills
- Insect and web removal
Not included
- Exterior glass
- Stained-glass restoration
Why it matters
Clerestory windows bring daylight deep into a room; dirty glass wastes it.
More on why it matters
Transom sills collect dust above every doorway.
How AELC providers clean transom and clerestory windows
Every provider follows the AELC Source-Control Method: capture the dust, don't move it.
- IdentifyNote heights and glass type.
- CaptureVacuum sills and frames.
- CleanClean glass with extension or water-fed tools.
- VerifyPhotograph.
How often, and how it's priced
Recommended frequency
| Churches, gyms and schools | Every 12 months |
Pricing is local
Your local AELC Certified Provider sets the price for your space. What affects it:
- How many transom and clerestory windows you have
- Height and access
- Dust, grease or buildup
- One-time reset or recurring schedule
DIY tips between professional visits
- Stained glass should only be dusted, never sprayed.
Safety: when work stops
- Lift work is Elevated Access.
See all red-light conditions and what AELC does not do.
Who needs it most
Transom and Clerestory Window Cleaning: FAQ
What is a clerestory window?
A clerestory is a row of windows high on a wall, above eye level, that lets daylight into a tall room.
Last updated October 4, 2026. Reviewed by the AELC Method team. Local services are performed by independently owned AELC Certified Providers. Above Eye Level Cleaning.