Why roofs fail quietly
Most flat and low-slope roofs don't leak dramatically — they absorb. Insulation below the membrane soaks up water year after year while the surface looks fine. By the time a stain appears on the ceiling, the wet area is often ten times the visible damage. Thermal imaging finds the wet insulation first, because water changes how a roof holds and releases heat.
Timing is the whole survey
A thermal roof survey flown at noon on a sunny day shows mostly the sun, not the roof. The reliable window is after sunset or before dawn, when dry areas cool quickly and wet insulation stays warm — glowing in infrared against the cooling field. Wind above a light breeze, rain within a day, or reflective coatings all shrink the window, which is why we plan thermal flights around physics, not convenience.
Reading the patterns
- Amorphous warm blotches that persist through the night window — classic trapped moisture.
- Linear warm tracks following seams or penetrations — flashing and joint failures.
- Patchy mottling across insulation boards — degraded or displaced insulation.
- Hot rectangles with hard edges — often equipment heat or reflections, not moisture. Context matters.
From thermograms to budgets
A useful report doesn't end with colorful images. Ours maps each anomaly onto RGB reference photos, grades severity by temperature delta and area, and separates fix-now failures from watch-list patterns. Roofers price directly from it; owners phase work across budgets; and a verification re-flight after repairs proves the dry — closing the loop instead of guessing.