List of featured suppliers of ROOF OUTLETS Rainwater Water Retention Drains (Blue Roofs) on Building Products Index
Roof outlets are openings in the uppermost surface of a building that direct rainfall or other precipitation away from the structure and into a drainage system. Rainwater refers to the precipitation that collects on the roof surface and is directed into the roof outlet. Water retention drains, also known as "blue roofs," are designed to slow down or temporarily store rainwater runoff before releasing it into the drainage system.