What are the current technical challenges associated with the implementation and maintenance of green roof systems in urban environments? Specifically, which design parameters (e.g., structural load considerations, insulation aspects, and hydrological management) require further optimization based on recent empirical studies? Additionally, how do the long-term performance metrics of green roofs align with sustainable building certifications and urban heat island mitigation strategies, and what cost‐benefit analyses exist that comprehensively assess their environmental impacts compared to traditional roofing solutions?