What is the peakiest part of a roof called where flashing is often installed?

The peakiest part of a roof is referred to as the ridge. This is the highest point of the roof where two slopes meet, creating a peak. Flashing is typically installed at the ridge to prevent water infiltration at junctions where different roof surfaces meet or where roofing materials change. The purpose of the flashing is to redirect water away from vulnerable areas, ensuring that the roof remains watertight.

In roofing terminology, the crest usually refers to a similar area but is less commonly used, while a valley is the low point formed by intersecting slopes, and the hip describes the external angle formed where two roof slopes meet but does not represent the peak itself. Understanding these terms is vital for identifying where specific roofing elements are installed for effective water drainage and overall roof integrity.