What term describes where two different sections of roof meet?

The term that describes where two different sections of a roof meet is "valley." In roofing terminology, a valley is formed when two sloping sections of a roof intersect at an angle, creating a trough-like area that facilitates the drainage of rainwater down the roof's surface. Valleys play a critical role in directing water away from the roof and preventing leaks, making them important components of roof design and construction.

Other terms mentioned, such as ridge and beam, describe different aspects of roofing structure. The ridge refers to the horizontal line at the top of the roof where two sloping sides meet, signifying the highest point of the roof. A beam is a structural element that supports weight and spans openings, but it is not specifically related to the intersection of roof sections. The saddle, typically used in different contexts, does not pertain directly to roof junctions in the same way that a valley does. Thus, "valley" is the most accurate term for describing the area where two different sections of the roof converge.