What Does a Drone Roof Survey Involve? Costs, Benefits and When You Need One

A drone roof survey uses a camera drone to photograph and film a roof in close detail from the air, without scaffolding or ladders. A Chartered Surveyor then reviews the images and reports on the roof’s condition, the defects found and what should be done about them.

At K&A Surveyors, every drone flight is carried out by a Chartered Surveyor who is a registered operator with the Civil Aviation Authority (CAA). We use a 4K camera drone and are fully insured. This guide explains what happens on the day, what a drone can and cannot show you, and when it is worth adding to your survey.

Key Takeaways

• A drone roof survey gives close-up photographs and video of roof areas that cannot be seen safely from the ground.
• It is most useful for older roofs, tall or large buildings, chimneys, valleys and flat roofs, and after storm damage.
• A drone shows the outside of the roof only. It cannot inspect roof timbers, insulation or condensation inside the roof space.
• It usually adds 30 minutes to an hour to a survey visit. Larger and commercial buildings take longer.
• The fee depends on the property. It is lower when the drone survey is added to another survey.

What happens during a drone roof survey?

A typical drone roof survey follows five steps:

1. Airspace and permission checks. Before the visit, we check for flight restrictions. Parts of London fall within restricted zones around airports, which need extra permission. We only fly where we have permission and there is no restricted airspace.
2. Weather check. Drones cannot fly safely in rain or strong wind, and wet roofs make defects harder to read. If the forecast is poor, we rearrange.
3. Pre-flight checks on site. The surveyor checks the drone, batteries and surroundings, and plans the flight to stay within the boundary of the property being surveyed.
4. The flight. The drone captures 4K photographs and video of every roof slope, the ridge, valleys, flashings, chimneys, gutters and any flat roofs.
5. Review and report. The surveyor reviews the footage, identifies defects and includes the findings, with annotated photographs, in your report.

What can a drone roof survey find?

From the air, a drone picks up defects that are often impossible to see from the street or a garden:

• Slipped, cracked or missing tiles and slates
• Chimney defects, such as cracked or missing flaunching, loose pots and eroded mortar
• Lead flashing that has lifted, split or been poorly repaired
• Valley gutters blocked with debris or showing signs of failure
• Gutters and downpipes that are blocked, misaligned or leaking
• Flat roof surfaces with ponding water, splits or blistering
• Defects around extensions and loft conversions, where new and old roofs meet

Finding these early is the main benefit. A slipped tile or failed flashing is a small repair. Left alone, the water it lets in can rot timbers and damage ceilings.

What a drone roof survey cannot show

A drone records the outside of the roof. It cannot assess:

• Roof timbers, rafters and purlins
• Insulation, ventilation or condensation in the roof space
• Hidden decay beneath coverings
• Defects that are concealed by moss or debris

That is why we treat a drone as part of a survey, not a replacement for one. In a Level 3 Building Survey, the surveyor also inspects the roof space from inside where it is accessible. The drone images and the internal inspection together give the full picture.

When is a drone roof survey worth it?

A drone roof survey is most useful when:

• You are buying an older property. Period homes often have complex roofs, chimneys and valleys that cannot be seen from the ground. Adding a drone to a Level 2 or Level 3 survey closes that gap.
• The building is tall, large or hard to access. Blocks of flats, commercial units and terraces with rear roofs are expensive to scaffold just to look.
• You have a leak or storm damage. A drone can locate the likely source quickly and provide photographs for an insurance claim.
• You manage property. Landlords and managing agents use regular drone inspections to plan maintenance before small defects become emergencies.
• Neighbouring work is planned. A drone can record roof condition as part of a Schedule of Condition before building work starts next door.

How much does a drone roof survey cost?

The fee depends on the property: its size, the roof’s complexity and whether the drone survey is booked on its own or with another service. We offer a discounted rate when a drone survey is added to one of our other surveys, which is the most cost-effective way to use it.

Compared with a scaffold or a cherry picker, a drone is usually the cheaper way to get a close look at a roof. It also causes less disruption, with no equipment to erect and no one needing to climb onto the roof.

Drone survey rules: CAA registration and safety

In the UK, drone flights are regulated by the Civil Aviation Authority. Before you book, check that your surveyor:

• Is a registered operator with the CAA
• Holds insurance that covers drone flights
• Checks airspace restrictions and obtains any permissions needed
• Respects neighbours’ privacy, flying only over the property being surveyed

Just as importantly, check who interprets the images. Photographs alone do not tell you whether a defect is cosmetic or urgent. At K&A Surveyors, the person flying the drone is a Chartered Surveyor, so the footage is assessed by someone qualified to judge the roof.

What happens after the survey?

If the drone survey finds defects, we can help with the next steps:

• Preparing a Schedule of Works that describes the repairs
• Obtaining quotes from contractors
• Project managing the repairs through to completion

Summary

A drone roof survey gives you a close, safe and detailed view of a roof without scaffolding. It is most valuable on older, larger or hard-to-reach roofs, after storm damage, and when you are buying a property with a complex roof. It shows the outside of the roof only, so it works best alongside a full survey that also inspects the roof space.

Want a drone roof survey in Kent, London, Essex, Surrey or Sussex? Find out more about our Drone Roof Inspections, call 01322 914058 or contact us for a quote.

Frequently Asked Questions