Do you need a robot, or a guy with a ladder?

We run a robot directory, so this is an awkward article for us to write: most small jobs do not need a robot. Some do. Here's how to tell, in about four minutes.

The Ladder Test

Could one competent person with a ladder, safely, do this job in an afternoon, and would they spot the things that matter?

If yes, hire the person. If no, keep reading, because a robot might be cheaper, safer or both.

The test fails (meaning a robot starts to make sense) when one of these is true:

1. Height or danger. Steep roofs, high-rises, towers, wind turbines, confined spaces, live electrical equipment. Robots are cheap. Hospital stays and insurance claims aren't.
2. Scale. 2,000 acres, 300,000 sq ft of floor, 40 km of pipeline. Robots love boredom at scale.
3. Repetition. The same job every night (floor scrubbing, patrol rounds, inventory counts). Robots don't call in sick, and they don't get bored.
4. Data. You need a measurable, repeatable record: a 3D model, thermal images, a centimetre-accurate survey. Humans take notes. Robots take point clouds.
5. Speed of access. You need eyes on something right now and there's no lift on site.

Worked example 1: the roof

Home roof inspections are the classic "do I need a drone?" question. HomeGuide's 2026 cost data puts a traditional walk-on roof inspection at roughly $75–$200 and a standard drone roof inspection at roughly $150–$400 (thermal: $400–$600) for a typical home (HomeGuide, accessed October 2026; Angi has similar ranges).

So the drone is usually not cheaper for a normal house. And a person on the roof can do things a drone can't: lift a shingle, press on soft decking, check the flashing by hand.

Verdict: single-storey, walkable roof? Ladder. Steep slate roof, three storeys, storm damage you can't safely walk, or an insurance claim that needs a full photo record? Drone. Big commercial roof or a solar farm with thermal imaging needs? Definitely drone.

Worked example 2: the windows

For a house, a window cleaner with a water-fed pole is hard to beat. For a tower, the maths flips. Drone facade-cleaning operators publish rates around $0.12–$0.25 per sq ft of facade (Vista Drone Cleaning), while a drone operator's comparison report quotes rope-access rates of roughly $0.40–$1.15 per sq ft in one market and higher in others (Upwash comparison report).

Grain of salt: both sources sell drone cleaning. But even the drone companies admit rope access still wins for hands-on scrubbing, sealant repairs, recessed details and close inspection.

Verdict: routine rinse of a mid-rise glass facade? Get a drone quote. Heavily soiled, ornate facade or anything needing repairs? Rope access team.

Worked example 3: the lawn

Robot mowers are a product purchase, not a service, for most homes. If your lawn is small, flat and fenced, a robot mower might pay for itself in a few seasons of not paying a mowing service. If it's steep, full of obstacles, or you mow twice a year, it's a very expensive garden ornament.

The hidden costs of robots that nobody puts in the brochure

• Mobilisation. Someone has to bring the robot, set it up and fly or drive it. On small jobs that's most of the bill.
• Permits and paperwork. Commercial drone work is regulated almost everywhere (in the US, under FAA Part 107). That's good for you, but it costs the operator time.
• Weather. Drones don't fly in high wind or heavy rain. Ask what happens on a bad day.
• The report. A drone flight produces 400 photos. Somebody has to turn them into "your north valley flashing is lifting." Make sure you're paying for the answer, not just the pictures.

The other direction: when people underestimate robots

• Big flat floors cleaned nightly. Commercial floor-scrubbing robots are now a normal subscription product.
• Anything mapped. If a surveyor quotes days of fieldwork, ask about a drone survey.
• Confined spaces. Pipe and tank crawlers mean nobody has to climb inside.

TL;DR

Still not sure? Describe the job. Or compare: drone roof inspection prices, high-rise window cleaning. We'll tell you honestly if it's a robot job, and if it isn't, you've lost nothing but two minutes.