The Economic Times

In a 2013 study, researchers found a healthy green roof cooled air by 1.58C at night, while drought damage cut that measured benefit to 0.78C

While green roofs can significantly reduce urban heat, they demand regular maintenance to sustain their efficacy. Recent findings indicate that roofs in disrepair fail to deliver adequate cooling during dry spells. Municipalities pursuing green roofing initiatives must account for ongoing maintenance costs. Without proper care, the ecological benefits of these roofs can erode over time, emphasizing their status as a continuous operational expense, rather than a singular investment.