What is a common feature of a flat roof that certified reviewers assess?

A common feature of a flat roof that certified reviewers assess is the proper drainage systems to prevent pooling water. Flat roofs have a minimal slope, which means that without an effective drainage system, water can accumulate on the surface. This standing water can lead to various issues, including leaks, structural damage, and deterioration of roofing materials. Proper drainage systems, such as scuppers, drains, and sloped areas to direct water flow, are crucial in maintaining the roof's integrity and longevity.

While enhanced insulation properties, aesthetics, and the presence of solar panels are important considerations in roofing assessments, they do not directly address the immediate functional requirement of managing water on flat roofs, which is critical for their performance. Hence, the focus on drainage systems is paramount in ensuring that the roof remains functional and durable over time.