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What Is Creosote, and Why Does It Matter?

November 8, 2026 · Chimney Care

What Is Creosote, and Why Does It Matter?

Creosote is a black or brown residue that forms when smoke and unburned wood particles cool and condense on the inside of your flue. Every wood fire produces some.

The three stages

  • Stage 1: Light, flaky soot that brushes away easily.
  • Stage 2: Crunchy, tar-like flakes that take more effort to remove.
  • Stage 3: A shiny, hardened glaze that is very difficult to remove and highly flammable.

How to reduce creosote

  • Burn dry, seasoned hardwood
  • Give the fire enough air; avoid smoldering fires
  • Have your chimney inspected yearly and cleaned when needed

Not sure how much buildup is in your chimney? Call or text 469-960-2007 for a free estimate.

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