It's also a bad idea to use an existing roof vent for bathroom exhaust. You'll partially block the vent with the duct pipe, reducing the flow of cooling air through your attic. Moreover ...

The plumbing vent is typically located on your roof. There are usually several fixtures connected to a single drain pipe in order to minimize the number of vents poking out of the roof.

“Your [expletive] goes straight through this pipe, into my nose,” Brewster said, pointing to the affected pipe in question. The roofer then pretended to gag, signaling that the smell could be ...

Jaimes suspects that the snake got into her toilet via a vent in her roof. Her husband has now put chicken wire across the vent to prevent any more slithery visitors from entering their home.