It is often the case that you may not easily have sight of what is happening on your roof. It could be that the gutter is not easily visible from ground level, and in some cases even from an elevated position it is difficult to see what is possibly wrong. It could be that it is difficult to obtain a scissor lift/cherry picker/boom lift, or that the location is not suitable for one, it could even be that it is just quite expensive. But even when one is obtained it is not always possible to get the full picture. Several of these shots are on internally facing elevations that would have not been seen by line of sight from around the edge of a building.