Cleaning Creosote


Hello, I had a question for you regarding my chimney. What should I do about cleaning creosote in my chimney? If I look up the chimney I can see creosote build up and that worries me. Is there anything I can do to remove this creosote myself without having to pay for a professional chimney sweep cleaning? My husband and I are really looking to save some money.

Thank you,

Theresa J., MI


Thanks for your question! People actually wonder this a lot. Cleaning creosote is very important and you are very right in assuming that the fireplace should not be burned. Creosote buildup is a major concern for us in the chimney industry. Built up creosote can cause chimney fires or will fuel a chimney fire and cause it to last longer and burn stronger. If a fire sparks in the chimney’s flue, creosote is likely to catch. A puffy creosote will act as fuel for for the fire. Another danger of having creosote buildup in your chimney is that it can cover a vertical crack in the flue tile or a missing mortar joint which are signs that a chimney fire has already occurred.

When it comes to cleaning creosote out of your chimney, your best bet is going to be having a chimney professional come out to sweep the chimney. A chimney professional who completes a video inspection of the chimney’s flue after sweeping it is worth the money because he can actually look in the chimney’s flue to make sure that there are no physical problems after removing all of the pesky creosote that builds up over time. NFPA 211 recommends that chimneys be swept yearly or after you burn through a cord of wood.

Creosote sweeping logs

Creosote sweeping logs are an option available to you in between having your chimney professionally serviced. As stated on the package, these logs should not replace a chimney professional servicing your chimney, but is great for use before a chimney professional comes to service the chimney. Creosote sweeping logs prevent new creosote from building up and treats existing creosote to make it easier to remove all creosote, even glazed creosote when the professional comes out.

Some folks will invest in their own chimney sweeping brushes. This one time investment allows them to clean their chimney’s flue yearly without having to call out a pro. If you wish to sweep your own chimney, more power to you. I would still absolutely recommend having a professional come out to evaluate the integrity of the flue system every year. Not all creosote is easily removable. Glazed creosote can ignite when the temperature in the flue system reaches a certain level and the creosote coats the walls of flue system. Usually glazed creosote is found in the flue after a chimney fire.

There are so many variables when it comes to creosote in your chimney and chimney sweeping. As I said before there is a lot of money to be saved in purchasing your own chimney sweeping equipment. Or, you can burn a creosote removal log prior to your professional coming out. But, having a professional coming out yearly to inspect your chimney is invaluable.

When it comes down to it you can never be sure what exactly is happening in your flue system without a video inspection of the chimney’s inner walls. Glazed creosote and excessively tall chimneys prevent problems for people who want to save money and sweep their own chimneys. At the end of the day I would honestly recommend doing some shopping when hiring a chimney professional. You should also have them come out to inspect the chimney yearly, even if you do want to sweep it yourself. But, in my opinion it is not worth the cost or effort.

For more information, check out our YouTube channel or other blogs!

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Clay Lamb

Clay Lamb is a Cincinnati Chimney Sweep contractor and the executive producer of the YouTube channel, podcast, and blog Ask the Chimney Sweep. He is also an award-winning educator and public speaker in the chimney and fireplace industry.….Educational Videos….American Chimney Cincinnati, OH We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.

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