I suspect you need double-wall insulated pipe for everything starting below the ceiling all the way up through the roof...but I think ERBenoit's right to suggest you consult somebody closer to the scene of the action to be sure.
Try to make a living, not a killing. -- Utah Phillips
Don't believe everything you know. -- Bumper sticker
Everybody is ignorant, only on different subjects. -- Will Rogers
There are lots of people who mistake their imagination for their memory. - Josh Billings
Law of Logical Argument - Anything is possible if you don't know what you are talking about.