Pharos Data · Roofs and buildings
Find the leak before the ceiling does.
Water trapped under a flat roof holds heat after the sun goes down, and in thermal it shows up as a clear patch. A Pharos station surveys roofs, facades and gutters from the air, so nobody climbs a ladder to find out what the camera already sees.
The problem
Roof problems stay hidden until they cost you.
A roof can hold water for months before it shows inside. By the time there is a stain on the ceiling, the insulation and the deck are wet and the repair has grown. Checking by hand means scaffolding, ladders and someone walking on a roof that might not take it.
- Leaks that show inside long after they start
- Scaffolding and ladders just to look
- Storm damage with no clear record
- Large roofs that are impossible to check by eye
What we offer
What the station does for you.
After sunset, wet areas under the membrane hold heat and show in thermal. Each one is outlined on a roof plan.
Where a building leaks heat, thermal shows it: missing insulation, open joints and warm spots.
The telephoto camera reads cracks, loose sheeting, blocked gutters and damaged fittings from a safe distance.
The station goes up after a storm and records what changed, with a date and a position on every photo.
Where it helps
Roofs we survey.
Anywhere a station can reach, without a ladder.
Trapped moisture under membranes, outlined on a roof plan.
Many roofs in one flight, each with its own findings.
Large roofs checked for moisture, loose sheeting and blocked gutters.
A dated record of what changed, for your contractor and your insurer.
The aircraft
The Matrice 4TD, built for thermal.
The thermal and close inspection work is flown with DJI's Matrice 4TD, from the DJI Dock 3.
Radiometric, so every pixel carries a temperature.
Or ±2%, from −40 to 150 °C. Up to 500 °C in low gain, at ±5 °C or ±3%.
Three 48 MP cameras at 24, 70 and 168 mm, so small parts are read from a safe standoff.
Measures the distance to what the camera is looking at.
DJI's published specifications for the Matrice 4TD.
How we do it
How it works on your ground.
- 01A station on siteOn an estate, a campus or an industrial site, the station already there does the survey.
- 02Thermal at the right hourMoisture surveys are flown after sunset, when trapped water shows best.
- 03Visual on the same passColour and thermal are captured together, so a shadow is not reported as a leak.
- 04A marked-up roof planEvery finding outlined on a plan of the roof with a photo, ready for your contractor.
Built by Pharos
Our own software, working for you.
The aircraft and station are DJI hardware. What makes them one service is software we wrote ourselves. Here is what it does for you on this kind of site.
Our media pipeline checks, sorts and processes every capture as it comes off the aircraft. Each report is built with the same method as the last one, so month on month the numbers compare.
Our evidence chain seals every clip and every flight log the moment it is captured, with the pilot, station, time and position attached. If anything were changed afterwards, it would show.
Our own software sits between the DJI hardware and everything above it. The station, your alarms, the pilots and the reports run as one system, and it is ours to maintain.
What you get
What lands with you.
- A roof plan with wet areas outlined
- Photos of every finding, positioned and dated
- A repair list in priority order
- Before and after records for storm claims
Questions
Roofs and buildings, answered.
Why after sunset?
During the day the sun heats the whole roof. After sunset, dry areas cool quickly and wet areas hold their heat, so the difference shows clearly.
Does anyone go on the roof?
No. Everything is captured from the air, so there is no scaffolding and nobody on a roof that might not be safe.
Can you check a single building?
Yes, where the station can reach it. The site assessment tells you what is in range.
Do you cover rooftop solar?
Yes. See solar inspection for panel faults; roof moisture and panel faults can be flown on the same visit.
Book a site assessment
See what a station covers on your ground.
Outline your property on a satellite map and answer four questions, or leave your details. It costs you nothing and you are not committing to anything.