A drone flies the elevation; every defect is traced at pixel level — cracking,
peeling, hollow render, staining and erosion. No ladder, no cherry picker, and the whole face
covered rather than the parts someone could reach.
Every defect, traced
Cracks followed along their length, not boxed. A surveyor on a ladder can see
this damage too — on the part of the wall they can reach, on the day they are there. The
value is the whole elevation, traced the same way every time, and comparable against the next
survey.
