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Most chimney fires are quiet and slow burning. Quiet, slow-burning chimney fires are usually caused by either a stray spark or high temperatures that ignite creosote buildup in the chimney. Creosote is a highly combustible substance that often looks sticky and tar-like. It is produced by burning wood.
Similarly one may ask, what is the main cause of chimney fires?
The main culprit of chimney fires is creosote. If the temperature in the chimney flue (the space inside the chimney) is high enough, and the creosote build-up thick enough, creosote can catch fire—and that fire can spread and move up the flue.
- Have Your Chimney and Fireplace Cleaned and Inspected Annually.
- Build Small Fires.
- Use Seasoned Wood.
- Never Use Paper or Combustible Liquids in the Fireplace.
- Use a Chimney Liner.
- Install a Chimney Cap.
- Ensure Good Air Supply.
Likewise, people ask, what are the signs of a chimney fire?
Common Signs of Chimney Fires
- Puffy Creosote Deposits. When creosote burns, the deposits expand and leave a puffy residue.
- Distorted or Discolored Rain Cap or Damper.
- Damaged Flue Tiles.
- Roof Damage & Residue.
- Visible Cracks in the Exterior Masonry.
- Scorched Areas of the Flue.
- #1.
- #2.
Any combustion will cease when all the available fuel has been consumed. A flue fire will be extinguished when there is nothing left to burn. Flue fires rapidly reach temperatures in excess of 2000° F. The thermal shock caused by this rapid escalation of temperature will damage ceramic or clay flue liners.