What is the vertical distance from the bottom of the rafter to the top of the ridge called?

The vertical distance from the bottom of the rafter to the top of the ridge is called the rise. In roofing terminology, the rise is a crucial measurement as it determines the angle or pitch of the roof. The concept of rise is essential for understanding how roofs are constructed and how they manage water drainage, insulation effects, and aesthetic appearance.

In contrast, the run refers to the horizontal distance from the wall plate to the center of the ridge, while span is the total distance across the building, from the outside of one wall to the outside of the opposite wall. Overhang refers to the portion of the roof that extends beyond the walls of the building. Thus, rise specifically identifies the vertical component of rafter measurement, which is fundamental in both design and structural integrity of the roofing system.