Drone Roof Inspection

Drone roof inspection uses small unmanned aircraft systems (UAS) fitted with cameras to capture images and video of a roof. Roofers, inspectors, insurers and building owners use drones to assess condition, document storm damage, measure roofs for estimates and monitor large commercial roofs, often without anyone climbing onto the roof.

What drones can capture

• High-resolution photographs and video of slopes, ridges, chimneys, valleys and flashings.
• Orthomosaic maps and 3D models, produced by flying automated grid patterns and stitching the images with photogrammetry software. These support measurements of area, pitch and edge lengths.
• Thermal images, with radiometric infrared cameras, to support moisture surveys on low-slope roofs under suitable conditions.
• Close-up inspection of areas that are unsafe or impractical to reach, such as steep or fragile roofs.

Benefits

• Safety: reduces the need to walk on roofs, especially damaged, steep, wet or fragile ones.
• Speed: large or multiple roofs can be documented quickly.
• Records: dated, geolocated images give a baseline for later comparison and for insurance or warranty records.

Limitations

• Drones cannot feel bruised shingles, test for soft decking, lift laps or probe seams. Hail and wind assessments often still need hands-on checks.
• Image quality depends on light, weather, wind and the pilot's skill.
• Thermal imaging needs specific environmental conditions and trained interpretation, and anomalies must be verified by cores or other methods.
• Battery life limits flight time.

Regulation

Drone flights are regulated by national aviation authorities. In the United States, commercial operators fly under the FAA's Part 107 rules, which require a Remote Pilot Certificate, aircraft registration, and operation no higher than 400 ft (about 122 m) above ground level, with the aircraft in visual line of sight. An exception allows flight within a 400 ft radius of a structure up to 400 ft above the structure's highest point, which is relevant to inspections of tall buildings. Canada, the United Kingdom, the European Union, Australia and other jurisdictions have their own licensing, registration and airspace rules. Privacy and neighbour concerns, flights over people and controlled airspace near airports are common restrictions.