Where should roof flashing be installed?

Roof flashing is a critical component in preventing water intrusion at vulnerable points on the roof. It should be strategically installed at intersections where the roof meets other structural elements. This includes areas around pipes, ducts, chimneys, skylights, and valleys. When flashing is properly placed around pipes and ducts, it helps to direct water away from these penetrations, reducing the risk of leaks and water damage.

Focusing specifically on the choice that was selected, installing flashing at intersections with pipes and ducts is essential because these are common areas where water can seep through if not adequately protected. Proper flashing ensures that water flows over the surfaces instead of pooling or infiltrating through potential gaps.

While other choices mention important locations for flashing, such as skylights and chimneys, the most comprehensive answer involves those areas that are not solely dependent on one component but include multiple penetrations of the roof surface. This reinforces the importance of comprehensive protection at all potential leak points on the roof, thereby enhancing the overall integrity and durability of the roofing system.