Protecting Your Home from Creosote Build-Up

At this time of year, when fireplace use is finally slowing and coming to a halt, creosote buildup raises two issues. First, whatever creosote is inside your flue, contact with moisture is going to make the fumes it produces much worse. Secondly, simply shutting those smells out of your house by closing the damper does not solve the greater issue.

Image courtesy of Dennis Lamb, Owner, The Mad Hatter Chimney Service in Indianapolis, IN.

Build-Up Stinks

Generally speaking, when you can smell something inside your house, it is time to really do something about it! For many of us, the solution is to throw the smelly item away or clean up the mess. However, a smelly chimney is just a bit more involved.

Many of us like to be able to use the chimney as the vent it is. That means a damper left open and a cap on top which naturally improves the chimney’s draft and keeps water out. Neither one is safely possible with creosote buildup greater than ¼” of SOOT or 1/8^” of later stage creosote.

…And It’s Bad For Your Chimney’s ‘Skin’

Every chimney cap will do a lot to keep wind gusts that cause downdrafts out of your chimney. It makes no sense at all, however, to cap a flue that contains unacceptable amounts of creosote. The longer that creosote stays in your flue, the more damage it does, which is the second type of harm you need to prevent.

Not only does creosote emit toxic fumes, unnecessarily exposing you to harmful carbon monoxide, but it is corrosive. Furthermore, the greater its accumulation, the more difficult it is to remove and the more dangerous it becomes. Protecting your home from creosote build-up means not allowing it to accumulate to any significant amount. When buildup is noticed, it is time to call a CSIA certified chimney sweep to take care of this problem.