Which element is NOT typically included in a low slope roof system?

In a low slope roof system, the fascia is not typically included as an integral component. The fascia is a board that is installed along the edge of the roof, primarily used for aesthetic purposes and to support the lower edge of the roof covering. It is essential for protecting the roof edges from weather damage and providing a finished look, but it does not play a critical role in the water management or insulation aspects of the roofing system.

On the other hand, insulation, membrane, and flashing are essential components of low slope roofs. Insulation helps in temperature regulation, the membrane serves as the waterproof layer ensuring water does not penetrate the building, and flashing is crucial for directing water away from vulnerable areas and preventing leaks. These components work together to ensure the effectiveness and longevity of the roof, making them vital in a low slope roof system.