What term is used for the last course of the roof where two areas of the roof intersect?

The term "Ridge Course" refers specifically to the last course of roofing material that is installed along the ridge, which is the highest point where two roof slopes meet. This course plays a critical role in both aesthetics and functionality, as it provides a finished appearance to the roof and helps in facilitating water runoff away from the intersection of the slopes.

Understanding why "Ridge Course" is the appropriate term involves recognizing its practical purpose: it seals the joint between the two sections of the roof, preventing water penetration. Furthermore, this course often includes materials designed to withstand wind uplift and resist wear from exposure to the elements.

In contrast, other terms like "Ridge" generally refer to the actual peak itself, while "Ridge Board" denotes the horizontal structural member that supports the rafters at the peak of the roof. "Ridge Shingles" might refer to the specific type of shingles used on the ridge, but it does not encapsulate the entire concept of the last course that covers the intersection. Thus, "Ridge Course" accurately captures the essence of the roofing element at that critical junction.