What is the minimum roof slope required for modified bitumen roofing?

The minimum roof slope required for modified bitumen roofing is 1/4 inch in 12 inches. This specific slope is essential because it helps ensure proper drainage of water from the roof surface. A slope that meets this minimum requirement reduces the likelihood of water ponding, which can lead to potential damage and shorten the lifespan of the roofing material. Proper drainage is crucial for maintaining the integrity of roofing systems, especially in areas where snow and rain are common.

Using a slope that's too low may result in drainage issues, increasing the risk of leaks and deterioration of the roofing system. Therefore, adhering to the minimum slope requirement is an important aspect of roofing design and is often enforced in building codes to protect both the structure and the occupants.