A roof inspection is most useful when it provides a specific description of the condition of individual locations. A general statement that the sheet metal looks good says little about the laps and seals. It is worth examining ridge tiles, barge flashings, gutter aprons and chimney flashings separately. Each group performs under different conditions. A good inspection record helps distinguish ordinary soiling from a defect requiring repair. From the ground it is possible to assess the line of the flashings, larger bends and traces of water on the façade. A detailed check of the fixings usually requires suitable access. It is worth commissioning this to a contractor equipped to work at height. There is no need to go onto the roof yourself to begin documenting a problem you have noticed.

After strong wind, a bent sheet corner is the easiest thing to notice. Less visible are disturbed fixings and gaps beneath the flashing. Barge flashings protect the side edges of the roof slope, so it is worth inspecting them during a roof check. Their good appearance from the ground does not yet confirm correct fixing. Conversely, a slight unevenness does not have to mean structural damage. The condition of the specific joint determines what to do next. From a safe position, check whether the barge flashing has kept a straight line. Look for raised ends, opened laps and sections standing away from the substrate. A photo taken from several sides is more useful than a close-up of the damage alone. It shows the position of the flashing relative to the covering.