TERRABONA
Service
Drone Difficult-Access Structure Cleaning
Cleaning of areas not easily served by cranes, lifts or scaffolding.
Overview
Many buildings have areas that remain uncleaned because access is impractical or prohibitively expensive. TERRABONA assesses these areas and, where technically appropriate, cleans them using specialised drones.
Every such project requires detailed study of geometry, obstacles and flight conditions before any commitment is made.
Suitable surfaces and contamination
Property types
- Buildings with complex geometry
- Historic envelopes subject to authorisation
- Industrial structures
- Infrastructure assets
Structural elements
- Cantilevers and recesses
- Internal atriums
- Narrow lightwells
- Areas with no lift set-down point
Surfaces
- Glass
- Metal
- Concrete subject to review
- Composite materials subject to review
Contamination
- Accumulated dust
- Biological growth in shaded areas
- Bird fouling
- Atmospheric deposits
Methodology
- Detailed study of geometry and obstacles
- Flight-condition assessment at the specific location
- Mission plan with alternative routes
- Trial work on a limited area
- Gradual extension after confirmation
Technical parameters
Water and pressure
- Required water volume calculated per project phase.
- Pressure selected according to material and working height.
- Stable supply through the ground-support system.
- Backup supply for continuous operation on large projects.
Cleaning agents
- Compatibility assessed for every material on the structure.
- Products used only where technically justified.
- Owner or designer approval obtained where required.
- Application and concentrations fully documented.
Limits and weather
- Increased wind sensitivity at greater working heights.
- Real-time weather monitoring during the mission.
- Airspace assessment in dense urban environments.
- Flight restrictions near infrastructure, helipads or airports.
Access and zones
- Exclusion zones on pavements, roads and entrances.
- Coordination with authorities for temporary traffic measures where needed.
- Take-off and landing points with controlled access.
- Communication protocol between pilot, observer and ground team.
Environment
- Overspray drift modelled for the working height.
- Protection of public space and vehicles.
- Runoff plan for urban drainage systems.
- Chemical use minimised in public environments.
Operational disruption
- Works carried out in low-activity windows.
- Sectional coverage so entrances remain open.
- Occupants, visitors and neighbouring properties informed.
- Defined stop-and-resume procedure for interruptions.
Quality control
- Zone-by-zone inspection from the air and from ground level.
- Points requiring an alternative access method recorded.
- Before-and-after documentation per section of the structure.
- Final report covering conditions, equipment and outcomes.
Maintenance
- Periodic cleaning programme based on exposure.
- Surface condition monitored between cycles.
- Framework agreements for recurring works.
- Integrated into the property's annual maintenance plan.
Information required for assessment
- Accurate survey of the location
- Clearance from obstacles and cabling
- Available take-off positions
- Local air movement at the specific point
- Alternative methods if unsuitable
Frequently asked questions
Is every difficult area feasible?
No. Some areas are judged unsuitable, and this is stated explicitly in the assessment.
What if an area is unsuitable?
TERRABONA reports it and either proposes an alternative approach or excludes that section from the project.
Assessment
Start your project assessment
Submission of project information does not constitute acceptance, approval or confirmation. Every project is subject to technical, commercial, regulatory, safety and operational assessment.