What type of flashing is appropriate for plumbing stacks and vents?

The appropriate type of flashing for plumbing stacks and vents is cylinder-shaped flashing with a boot. This design is specifically suited for addressing the unique challenges posed by plumbing stacks and vent penetrations that extend through the roof surface. The cylinder shape allows the flashing to conform closely to the contours of the plumbing stack, effectively sealing around it to prevent water infiltration. The boot component enhances this seal by providing an additional layer of protection against leaks, particularly in areas where water may pool or run down the roof.

In the context of roofing applications, it’s crucial to select flashing that not only fits the shape of the penetration but also properly channels water away from the stack. This consideration helps ensure the longevity of both the roofing material and the plumbing stack, reducing maintenance needs and preventing costly repairs down the line.

Flat sheet flashing, continuous flashing, and corner flashing each serve specific purposes in roofing systems but are not tailored for the unique needs of plumbing stacks and vents, which require a design that accommodates vertical pipes specifically.