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There are three levels of creosote:
Level 1: creosote is usually a light powder or soot and can easily be removed.
Level 2: creosote is often shiny and hard black flakes. This level of creosote is more difficult to remove.
Level 3: The most severe and challenging form of creosote is level 3. It is extremely thick and hardened. It is similar to tar. Level 3 creosote is extremely difficult to remove and poses a severe fire hazard.
Level 3 creosote is also called glazed creosote. It forms when creosote rapidly accumulates in the flue before the previous layers have dried. As it hardens, glazed creosote dries into a hard, dense substance that can damage the flue and chimney structure. Glazed creosote can be caused by burning unseasoned wood or by burning a fire at a low temperature for a long time.
What is most dangerous about glazed creosote is that it is highly flammable. A fire can easily cause the glazed creosote to ignite. This can lead to a fast burning chimney fire.
If you believe that there is glazed creosote in your flue, give Emberstone Chimney solutions a call!
Source: Chimney Sweep Raleigh NC | Chimney Sweep Charlotte NC
