Architecture company develops a roof that collects rainwater and cools your house at the same time
https://returntonow.net/2019/06/22/bowl-shaped-roofs-collect-rainwater-and-cool-house/
A brilliant new bowl-shaped roof serves a double purpose for people living in hot, arid climates — providing free water and free air conditioning.
The “Concave Roof” is designed to “help even the smallest quantities of rain flow down the roof and eventually coalesce into bigger drops, just right for harvesting before they evaporate,” the architects told Arch Daily.
The shape of the roof is perfect not only for maximizing water collection but also for providing shade and airflow between itself and the interior layer of roof, helping keep the house below cool.