I have a wood insert with a flex liner going up and out the chimney. We are getting a downdraft coming down around the flex liner into the room, from around the insert. There is a rain cap at the top of the chimney, but it doesn't seal around the flex liner. Is that suppose to be air tight so that air can't go down around the flex liner? I don't want to cause CO to get into the room by sealing the chimney, around the flex liner, but I don't know how else to solve this issue.
How best to cap a wood insert?
- Thread starter tchescat2000
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There is insulation around the liner at the top and a open cap on top. I say open cap, because there is no way to seal around the liner pipe itself, as the cap only goes around the whole chimney.
Are you talking about sealing between the liner and the top plate like at the 10:15 mark in this video?
Ctwoodtick
Minister of Fire
Wanted to revive this thread to see if using silicone between the liner and top is needed, as shown in the above video.
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