A specialized flashing piece designed to fit around circular penetrations like plumbing vents, conduits, or structural supports. It integrates with the horizontal membrane and extends up the vertical pipe to prevent water from running down the penetration into the building. They are usually secured with a stainless steel drawband and sealed at the top with sealant.
Heard on the job
Slide the flashing collar over the vent pipe and strip the flange into the base sheet.
Also heard as
- roof jack
- flashing boot
Do not mix it up with
- Boot: A boot is a specific type of flexible, pre-molded flashing collar, whereas a flashing collar can also be fabricated from sheet metal.
Related terms
Boot
A preformed or field-built collar that seals a pipe, rod or conduit where it passes through a membrane.
Flashing
Thin sheet metal or membrane installed at joints and interruptions in a wall or roof to direct water back outside.
Base flashing
The primary membrane plies that transition a roof system up a vertical surface.