No damper or cap on chimney

miles27 1 post Nov 04, 2009 5:00 AM	Can the chimney balloon still work if we don't have a chimney cap or damper on top? Will rain affect the ballon? We have a damper below.
jasonr 56 posts Nov 04, 2009 8:25 AM	Hi Miles, The Chimney Balloon will still work in a fireplace that does not have a cap or top damper on the chimney. The precipitation does not effect the balloon at all. As a matter of fact, an open chimney top is often the case with large older constructions buildings with fireplaces (especially pre 1900's). However, there is something to be said about what a large amount of precipitation does to the inside of your chimney. Bricks are pourous and absorb moisture, so when your chimney is getting wet on the inside and outside it can be a hard on the bricks and tuck pointing. Sealing off the flue with a chimney balloon will eliminate the air current that flows through the chimney and assists in drying it out. If this is a fireplace you use I would recommend you look into a cap for it. If this is a fireplace that you do not use at all, you may want to cover the chimney crown with some type of simple metal or wood weighted lid to keep the precipitation from having free access to the inside of the chimney. ---------- Jasonr Moderator
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