Which of the following types of observers must be able to see granule loss for it to be considered functional damage?

The term "granule loss" refers to the erosion of granules from roofing materials, particularly asphalt shingles, which can lead to functional issues, such as diminished effectiveness in protecting the underlying structure from water infiltration and UV damage.

For a situation to be classified as functional damage due to granule loss, it is important that the observer can recognize and identify this specific type of deterioration. The casual observer, often a homeowner or non-specialist, is typically considered to have the least technical knowledge about roofing materials and systems compared to other observers.

However, they must still be able to see the granule loss to identify it as a functional problem. Casual observers may not have the training necessary to fully comprehend the implications of granule loss on the integrity of roofing systems. Still, they are capable of noticing visual indicators—such as dark patches on the roof or granules in gutters—prompting them to understand that there could be an issue without needing specialized knowledge.

Other roles, like building inspectors or expert analysts, may rely on more detailed assessments, utilizing their experience to ascertain the implications of granule loss beyond mere visual observation. Therefore, while they might possess the skills to recognize functional damage effects, the casual observer's requirement to visually identify gran