Reply by Fred Hargis

That sounds like snaplock, and you only use it in the room. At the ceiling you would want to transition to a triple wall type of pipe that would go through the attic/roof, to the chimney cap. At the roof you will need the appropriate flashing/storm collar. Take a look at the illustration in the link, it shows the parts.

-- I long for the days when Coke was a cola, and a joint was a bad place to be (Merle Haggard)