Which of the following aspects is NOT typically included in the assessment of a roofing system?

The assessment of a roofing system generally focuses on various components that contribute to the integrity, performance, and longevity of the roof. While the presence of solar panels can influence certain aspects of a roofing system, such as load capacity or potential points of failure, it is not inherently a core part of evaluating the roofing system itself.

Typically, the evaluation concentrates on aspects like the type of flashing used, as this plays a crucial role in preventing water intrusion at roof penetrations. The condition of gutters and downspouts is also vital, as these systems manage water runoff and can directly affect the roofing system's performance by preventing water from pooling on the roof. Additionally, the age and historical performance of the roof provide essential context regarding its expected lifespan and potential issues that may arise over time.

In contrast, while solar panels may be relevant in specific contexts—especially if they are installed improperly or affecting the roof's drainage—they do not form a foundational aspect of the roof's assessment in the same manner that the other factors do. Thus, their presence is not a standard criterion in the comprehensive evaluation of roofing systems.