Is a drone useful for high, steep or difficult roofs?

Because inspecting them costs money before anyone knows whether work is needed. Scaffolding a three-storey property or a steep slate pitch just to look is a serious expense, so the look is postponed, and problems are found only when water arrives inside.

Removing the cost of looking changes that. Condition can be established as a matter of routine rather than a decision.

Upper slopes and ridges on tall buildings. Steep pitches where foot access risks damaging the covering. Hidden valleys and box gutters between roofs. Areas behind parapets. Chimney heads and pots. Roofs over rear extensions overlooked by nothing.

These are also the areas where failures do the most damage before they are noticed, because water has further to travel and more to wet on the way.

Wind at height, rain, and proximity to obstructions all affect whether a flight is possible and how close it can safely get. Sites have to be suitable under the CAA's rules for the surroundings. Dense tree cover or very confined spaces can restrict what is achievable.

Where the survey cannot cover part of a roof, that should be stated in the report and an alternative arranged, not quietly omitted.

Physical testing of fixings, lifting components, opening up, and the repair work itself. On a difficult roof, knowing the scope first is what makes the access proportionate — which is where most of the saving actually comes from.

A survey establishes what the visible surface is doing, which on a difficult roof is usually the missing piece of information. It does not remove the eventual need for someone to test a fixing, lift a component, or inspect the roof space where findings suggest concealed condition matters.

The practical sequence is survey first to decide whether that access is warranted, then plan the access around what was actually found rather than guessing at the scope before anyone has looked.