What is drone curtain wall cleaning?+
An FAA Part 107-licensed pilot flies a tethered industrial drone carrying a dual-payload spray head — 0 TDS de-ionized pure water for glass and anodized-safe biodegradable detergent for aluminum mullions and frames. The drone reaches every pane and frame from the ground up without scaffolding, swing stage, boom lift, or rope access.
Why does Miami curtain wall need cleaning so often?+
Three accelerators: salt haze (oceanfront elevations cloud within 30–60 days), pollen and pollution (urban Class A office picks up film within 60–90 days), and aluminum frame degradation (chloride ions from salt air start pitting anodized aluminum within 6–12 months if uncleaned). Glass-only cleaning misses the frame issue — and the frames cost more to replace than the cleaning costs for a decade.
What is 0 TDS de-ionized water and why does it matter on curtain wall?+
TDS = total dissolved solids. Tap water in Miami runs 200–400 TDS — minerals that dry on glass and leave spots. 0 TDS water is filtered through reverse osmosis and de-ionization beds until the mineral content reads zero on a meter. It dries streak-free on every pane with no squeegee. This is how the drone leaves curtain wall spotless without anyone touching the glass.
What glass coatings are safe to drone-clean?+
All modern coatings: low-E, tinted, mirrored, ceramic-frit, Solarban (60, 70, 90), SunGuard SN/HP/SuperNeutral, Vitro Solarban, and Guardian SunGuard. Pure water at low pressure has zero impact on any of these coatings. Window films (3M, SunTek, Llumar) are also safe.
What about aluminum mullions, sunshades, and frames?+
Anodized-safe biodegradable detergent dwells briefly on the frames to lift salt deposits and pollution, then rinses with 0 TDS pure water. Salt pitting of aluminum begins within 6–12 months if uncleaned — and once it starts, the only fix is anodized refinishing or replacement. Cleaning twice a year prevents it entirely.
How does drone curtain wall cleaning compare to rope access on cost?+
Drone: $0.15–$0.25 per sqft of glass. Rope access on the same building: $1.75–$3.50 per sqft. The 8–18× cost gap comes from rigging time (rope access spends 2–3 days per elevation setting anchors and rope schedules), insurance overhead (workers at height), and labor productivity (rope tech moves slower than drone reach).
Can drone cleaning handle complex curtain wall geometries — fins, sunshades, returns?+
Yes. The drone holds position at any elevation and angle, so vertical fins, horizontal sunshades, curtain wall returns, cantilevered glass, and parapet caps all get reached. Rope access struggles with anything that deviates from a flat plane because rope schedules assume a vertical surface.
Do you need to close lanes, sidewalks, or building entrances?+
Almost never. The ground crew sets up in one rooftop pad or one parking space. Spotters maintain a brief, mobile perimeter zone directly under the active flight zone. Lobby access, porte-cochère, and street-level retail continue normally.
How long does a curtain wall cleaning project take?+
Mid-rise curtain wall (4–10 stories): 1 day. High-rise (10–30 stories): 2–3 days. Super-tall (30+ stories): 3–5 days. The drone covers 5–10 floors per day. Rope access on the same building runs 5–14 days.
What insurance do you carry for curtain wall work?+
We carry $2M commercial general liability plus dedicated UAS (drone) liability and hull coverage. COIs naming the building owner, property manager, and HOA or condo board are issued before mobilization on every project.
Do you need FAA authorization for curtain wall flights?+
Yes. Most of urban Miami sits in controlled airspace near MIA. We file LAANC airspace authorization with the FAA before mobilization and carry the certificate on every job site. Pilots operate under 14 CFR Part 107.
Can you clean curtain wall on an occupied office tower or hotel?+
Yes. No swing stage outside windows, no scaffolding, no lobby intrusion. Tenants get a 48-hour notice and the drone works one elevation at a time. Pre-dawn or weekend flights are available for trading-floor offices and hotels at no premium.