Historic buildings are fragile, so climbing around on them is both dangerous and could result in significant damage. Bringing in large man lifts or bucket trucks is very expensive and requires street blockage permits. Those operations are intrusive, and they still can’t safely reach most of the areas that require close but gentle inspection.
Large cranes hanging bolsom chairs are both costly and cumbersome while providing limited results. Both methods as well as mast climbers or other conventional procedures bring significant safety concerns, inconvenience and disruption as well as huge expense. Why spend much more and expose workers to extreme danger when there are better ways to accomplish the task? Drone based camera platforms offer the best technology and are the proven option to complete these challenging but important tasks.