Replies

1. 
   razzman | Mar 12, 2006 05:25am | #1

   Greetings b,

   This post, in response to your question, will bump the thread through the 'recent discussion' listing again.

   Perhaps it will catch someones attention that can help you with advice.

   Cheers

   'Nemo me impune lacesset'
   No one will provoke me with impunity

2. 
   razzman | Mar 16, 2006 03:21am | #2

   bump

   'Nemo me impune lacesset'
   No one will provoke me with impunity

3. 
   philarenewal | Mar 16, 2006 04:30pm | #3

   Bryan, there's more to it than just sealing off the abandoned stove pipe that somebody ran up the furnace flue.

   If your furnace chimney is big enough to fit a stove pipe plus vent the furnace, it's likely oversized.  It's also likely unlined.  But maybe not, and maybe the old stovepipe should be removed instead of just capped.

   You really need to get a licensed mechanical contractor to look at it.  Too dangerous to fart around with.

    

   "A job well done is its own reward.  Now would you prefer to make the final payment by cash, check or Master Card?"

4. 
   csnow | Mar 20, 2006 10:31pm | #4

   I like to use a heavy piece of bluestone or similar to cap a brick chimney.

   Ideally, it would overhang on each side somewhat.

   You can use a poly caulk, such as PL Roof and Flashing to hold it down.

   You want to get it airtight.

1. 
   philarenewal | Mar 20, 2006 11:15pm | #5

   Uh . . . maybe I read his question wrong, but I think there is still an operating furnace that uses the chimney. 

   "A job well done is its own reward.  Now would you prefer to make the final payment by cash, check or Master Card?"

1. 
   csnow | Mar 21, 2006 12:07am | #6

   "Uh . . . maybe I read his question wrong, but I think there is still an operating furnace that uses the chimney."

   I dunno.  Would be best not to cap an active chimney.

2. 
   seeyou | Mar 21, 2006 12:07am | #7

   You need to be sure the chimney is air tight from the inside or you'll get condensation on the inside which will freeze in northern climates if you cap it airtight at the top. I've seen one split open from the above problem.Birth, school, work, death.....................

   http://grantlogan.net/

3. 
   bryank | Mar 21, 2006 09:29pm | #8

   "Cap" was the wrong word. The chimney is active and I'm certainly not capping the top at the roof. It's plugging an opening in the chimney where a wood stove pipes into a chinmey shared by the furnace. I needed to plug the hole where the pipe from the woodstove connected into the side of the chimney.

   Thanks. B.

1. 
   csnow | Mar 21, 2006 10:26pm | #9

   Brick?

   Perhaps you could screw down a steel plate over it.  Seal with RTV silicone.

   You could also mortar in some new bricks.

2. 
   philarenewal | Mar 24, 2006 05:32am | #10

   If you had only said just that in your first post . . .  ;-)

   Before you cap it with brick ot a metal plate as csnow suggested, I have to ask, is there still a short stub of pipe sticking out of the chimney and is this short stub of pipe at or very near the base of the chimney interior?

   If it is, it maybe was or could now be used as a cleanout for the chimney.

   If not, forget I mentioned it.  ;-) 

   "A job well done is its own reward.  Now would you prefer to make the final payment by cash, check or Master Card?"