Hail storms are a good example, where damage may occur to buildings that have passed their serviceable life.
For us the definition of serviceable life is whether the element can continue to provide the expected performance as designed by the manufacturer.
In the below example there is clearly hail damage to this roof however it also showing signs it has passed its serviceable life.
Close-up of corrosion through roofing sheet
Lead head nails that have popped
Condition of sheet and ridge capping
Condition of paint and sheet surface
Would you authorise repairs on this roof?