Metal tape on furnace flue?
Asked Oct 14, 2006, 01:43 PM
My furnace flue is a double walled pipe, 6-inch (I think) inside 8-inch (I know). It goes up through a chase in the middle of the house to the attic, where it basically comes out of wooden framework and continues on to the roof. The chase is open to the attic. I want to close off the top of the chase where it enters the attic. I've cut a large piece of roof flashing so it fits snugly around the flue and covers the chase, and I need to close the cut that I made in the cover so I could get it around the flue. I assumed that metal tape would be okay for this, but I'm not sure. (For that matter, is it okay to use the cover of aluminum flashing, since it would be touching the flue, which I assume is not aluminum?) I also was told that I should put fireplace caulk around the flue to close the gap where the new metal cover touches it, and I wonder if anyone has any words of wisdom about doing this.
Thanks for any info.
Last edited by dinkins; Oct 14, 2006 at 01:51 PM.