For decades, the image of building maintenance has stayed the same: workers suspended by ropes, buckets at their sides, cleaning windows high above the city skyline. It’s dangerous and labor-intensive work. And it hasn’t changed much in half a century.
But according to Grant Persall, founder of Skydweller Technologies, that’s about to change. His company is using drones, AI, and thermal imaging to revolutionize how people clean and maintain their buildings. It’s not just about spotless glass. It’s about protecting workers, extending asset life, and saving property owners money.
The Wake-Up Call: The True Cost of Traditional Building Maintenance
When Persall first began exploring drone technology, he wasn’t planning to reinvent window cleaning. But a closer look at the numbers changed everything.
Falls account for 70 to 80 percent of workplace fatalities worldwide, and Canada sees preventable deaths every year in building maintenance. Even minor falls can cause serious injuries like fractured bones or long-term disability. In this sector, five percent of workers file serious injury claims each year, which compounds to roughly a quarter of the workforce being injured within five years.
In financial terms, that adds up to more than $100 million annually in claims across North America. The impact ripples outward: when a window breaks during cleaning, that area of a building becomes unsafe and unusable. Office tenants are displaced, repairs take weeks, and the costs keep mounting.
For Persall, the human and financial toll made one thing clear: there had to be a better way.
Beyond Cleaning: Building a Technology Company
From the start, Skydweller Technologies took a different approach. Persall didn’t want to be another cleaning contractor. He wanted to build technology that could redefine the entire industry.
He assembled a team of engineers, data scientists, and graduates from UBC and BCIT, alongside technologists with Silicon Valley experience. The focus wasn’t on scaling crews. But it was on research, design, and automation.
That investment paid off quickly. When Victoria General Hospital needed its exterior cleaned, Skydweller’s proposal came in at one-eighth the cost of traditional bids. The hospital redirected those savings to buy medical equipment, a real-world example of how innovation frees up resources for more meaningful investments.
Since then, Skydweller has worked on high-profile sites including Vancouver Convention Centre, CBC Radio, airports, government buildings, and commercial towers. Each project has reinforced the same conclusion: drone cleaning is faster, safer, cleaner, and significantly cheaper.
Four Pillars of Innovation: Faster, Safer, Cleaner, Cheaper
- Safety First: Reducing WCB Claims by 99 Percent
With Skydweller, workers never leave the ground. Every drone is operated from below, eliminating the risk of falls entirely. The result so far: a 99 percent reduction in WCB claims and zero fatalities.
For property managers, that translates to fewer incident reports, less administrative burden, and peace of mind.
- Deionized Cleaning: Cleaner Glass, Longer Lasting Results
Skydweller’s patented deionization system purifies water before it’s heated to 80°C and sprayed on building facades. Because no contaminants remain, the glass dries spot-free. Even better, the deionized water creates a mild electrostatic charge that repels dust for up to 12 hours after cleaning.
Unlike squeegees, which push dirt and debris to the edges, this process cleans windowsills, frames, and channels, preventing buildup that can damage seals and trap moisture.
- Asset Longevity: Extending Window Life by 30 Percent
By keeping windowsills and caulking free from algae and mold, Skydweller’s approach helps extend the lifespan of window systems by up to 30 percent. For many strata buildings, that means avoiding or deferring costly replacement projects worth hundreds of thousands of dollars.
Preventative maintenance, Persall emphasizes, isn’t just about appearances, it’s about preserving the building’s value.
- Cost Efficiency: Smarter Operations and Scheduling
Traditional window cleaning requires lifts, scaffolding, road closures, and sometimes permits. Skydweller’s drones eliminate all of that. Jobs that once took days can now be completed in hours.
Because drones can operate at night, in light rain, or in cooler weather, cleaning can be scheduled year-round, avoiding the premium pricing, and delays, that comes with peak seasons.
And the company’s upcoming “swarm technology” — multiple autonomous drones working together — will allow entire building facades to be cleaned simultaneously. Persall expects to deploy this system in 2026, further increasing speed and lowering costs.
Facility Intelligence: Turning Maintenance into Measurable Data
Cleaning is only part of the story. Skydweller’s drones also serve as data collectors, capturing 8K video, LiDAR scans, and thermal imaging of every surface they clean.
The result is a detailed digital map of the building envelope. Consider it an “MRI scan” for your property. It reveals cracks, sealant failures, and areas of moisture intrusion invisible to the human eye.
For engineers and property managers, this information is invaluable. Repair estimates can be based on complete data instead of assumptions, leading to more accurate quotes and fewer cost overruns.
Thermal scans also identify heat loss and insulation failures. By comparing scans annually, owners can detect degradation early and plan repairs before small issues turn into major damage.
Best of all, this data is included with every Skydweller cleaning. It belongs to the building owner and can be passed along during sales or management transitions. It can create a permanent, evolving record of the property’s health.
Compliance, Training, and Safety Standards
Operating drones in urban environments isn’t the Wild West. Every Skydweller pilot holds an Advanced Drone Pilot License from Transport Canada.
Flights are logged and approved, and for sensitive locations, like airports or government sites, Skydweller coordinates directly with air traffic control and security teams.
The company also runs a rigorous eight-point internal training program to ensure operational safety and precision. Each drone is tethered to prevent uncontrolled flight, and all pilots undergo continual certification updates.
This isn’t about cutting corners. It’s about setting a new professional standard for how drones are integrated into the built environment.
Redefining the Workforce: From Rope Access to Remote Control
What about the people who used to do the work manually? Persall is clear: this isn’t about replacement them. It’s about retraining them.
Former rope-access technicians can now earn their drone pilot certification and transition into technical, higher-paying, and far safer roles.
This shift mirrors a larger trend in many industries: technology enhancing human skill rather than eliminating it. A veteran window cleaner’s experience in building materials and access logistics remains valuable, but now it’s paired with data analytics and precision control.
The Bigger Picture: Data-Driven, Human-Centered Innovation
What makes Persall’s approach revolutionary isn’t just the technology, it’s the philosophy behind it.
The goal isn’t disruption for its own sake. It’s technology in service of people: reducing workplace injuries, lowering building costs, extending asset life, and providing better information for decision-making.
Why This Matters for Owners and Strata Councils
For BC strata councils and owners, these innovations have direct and measurable benefits:
- Fewer emergencies and lower costs through proactive maintenance
- Extended window system life – can up to 30 percent longer before replacement
- Reduced liability and improved worker safety
- Comprehensive building data for accurate quotes and repair planning
- Improved resale value for units in well-documented, well-maintained buildings
Preventative maintenance is the smartest investment a council can make. A small budget for regular drone cleaning and inspection can possibly save hundreds of thousands in repair costs down the line.
Looking Ahead: The Future of Facility Maintenance
By 2026, Skydweller expects to deploy multi-drone swarms capable of cleaning and scanning entire buildings in a fraction of today’s time.
But the real innovation lies in data aggregation. Using years of thermal and visual data to predict when systems will fail. Imagine strata councils receiving AI-generated maintenance schedules based on real-world degradation patterns instead of guesswork.
That’s not science fiction. That’s the near future of strata management.
The Bottom Line
The rope-and-squeegee era of building maintenance is ending. In its place, a new model is emerging. A safer for workers, smarter for owners, and better for buildings model.
For strata managers and strata councils, this is the moment to embrace the shift. The tools now exist to clean, inspect, and maintain buildings faster, cheaper, and with more insight than ever before.
The question isn’t whether this technology will reshape the industry. It’s how quickly communities will adopt it.