Clean your chimney often to prevent stage three and to avoid costly removal. Chemical treatment or special rotary chain whips are often required to remove stage three creosote. This stage is very dangerous because the creosote can catch fire at lower temperatures. Stage three creosote will appear as a thick tar like coating on the inside of the chimney walls. Stage three creosote should be dealt with right away. Stage two creosote will be much harder to remove and you will need a much stiffer bristle brush and other tools to possibly scrape the creosote from the inside of the chimney walls. This stage will restrict the flue pipe and can cause a wood stove or fireplace to smoke.
Stage two creosote looks like chunky tar flakes. Stage two creosote is much more concerning. However, it is very important to remove the creosote to prevent restrictions in the flue pipe. Stage one creosote is a dust like soot coating on the wall of the chimney. You will see it even if you are burning your stove or fireplace correctly with good hot fires and dry wood. There are three stages of creosote and it is important to identify the level of creosote you have and remove it before it becomes too dangerous. Totally preventing creosote buildup in your chimney is unavoidable when burning wood.
It must be handled with care when removing. The particles and organic compounds of the unburned fuel are carried into the chimney in smoke form, this becomes the makeup of creosote when the flue gas condenses.Ĭreosote is a flammable substance which can burn at extremely high temperatures and is also a carcinogenic (potentially cancer causing) material in the unburned state. When the smoke from a fireplace or a wood stove leaves the firebox, it often condenses in the chimney or the connector pipe. Creosote is the byproduct of incomplete combustion when wood is burned.
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