Creosote & Chimney Fire Safety in Connecticut

What creosote is

Creosote is the tar-like residue left when wood smoke cools and condenses inside a flue. It builds in three stages: flaky soot, crunchy tar, and finally a hard, glazed coating that is difficult to remove and highly flammable. Connecticut's long burning season, cold flues, and slow overnight fires are ideal creosote conditions — which is why annual sweeping is the standard here, not a suggestion.

What a chimney fire looks like

Many chimney fires are not dramatic: a loud roaring or cracking sound, dense smoke, a hot smell, or sparks from the chimney top. Some burn slowly enough that homeowners only discover them when an inspection finds heat damage. Either way, stop burning, get everyone out if there is any doubt, call the fire department, and do not use the chimney again until it has been inspected.

How to keep creosote down

• Burn only seasoned hardwood — dry wood, split and stacked for at least a year, burns hotter and cleaner.
• Avoid slow, smoldering overnight fires that let smoke cool and condense in the flue.
• Sweep every year before heating season, and sooner if you burn heavily.
• Never burn trash, treated lumber, or glossy paper — all of them add deposits and toxins.
• Install and maintain smoke and carbon monoxide alarms on every level, especially near sleeping areas.

After a chimney fire

Even a small fire can crack clay liners and damage masonry you cannot see from the ground. A Level 2 camera inspection is mandatory before the chimney goes back into service — see our inspection page for what that covers.