Which type of flashings are typically found between a traditional shingle roof and a vertical surface?

Step flashings are specifically designed for installation at the intersection between a sloped roof, such as a traditional shingle roof, and a vertical surface, which could be a wall or a chimney. The purpose of step flashings is to effectively channel water away from the vertical surface and prevent moisture intrusion by overlapping each course of shingles. Each piece of step flashing is installed alongside the shingles, allowing for a layered effect that enhances the roof's waterproofing.

This installation method is crucial because it ensures that water flows down over the flashings and off the roof, rather than potentially seeping behind the shingles or into the joint between the roof and the vertical surface. Proper installation of step flashings is essential for maintaining the integrity of the roof and preventing leaks in areas that are particularly vulnerable to water penetration.