What is the recommended slope for roof drainage?

The recommended slope for roof drainage is 1/4 inch per foot. This slope is generally accepted as an effective measure to ensure that water is directed towards the drainage systems and away from the roof surface. This particular gradient balances the need for sufficient drainage with practical considerations regarding the construction and aesthetics of the roof. A slope too steep could lead to challenges with installation and may interfere with roofing materials, whereas a slope that is too shallow might not effectively carry water away, causing potential water pooling or leaks.

This slope supports proper drainage requirements and is widely endorsed in building codes and industry standards to maintain the integrity of roofing systems while minimizing the risk of water damage. When constructing or assessing roof designs, adhering to this recommended slope can significantly enhance the longevity and functionality of the roof.