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Safety

Creosote

Tar-like residue from incomplete wood combustion. Highly flammable.

All glossary terms

What is Creosote?

The black, sticky-to-glassy substance that builds up inside a chimney flue when wood smoke condenses on cool walls. Stage 1 is dust, Stage 2 is crunchy, Stage 3 is hard glaze — and Stage 3 is what causes most chimney fires. Annual sweeping removes Stages 1–2; restoration removes Stage 3.

Related terms:SweepFlueChimney Fire

Need a creosote inspection or repair?

We work on creosote every week across DFW. CSIA-certified, written quotes, financing available.

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Chimney, ducts, vents and insulation — book the services your North Texas home needs and we'll knock them out together. Schedule your free estimate today.

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Water coming in, a critter in the flue, smoke trouble, or damage after a fire? A real person picks up from 7 AM to midnight, every day, and answers in under two minutes. We aim to have a crew at your door within two hours during the day, as soon as one is free after hours.

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