Health Department Urges Homeowners to Clean Chimneys Before Winter Use

CLAY COUNTY, N.C. — With winter’s return and fireplaces being used more frequently, the Clay County Health Department is reminding residents to inspect and maintain their chimneys to prevent heating-related fires linked to poorly maintained fireplaces.

According to the National Fire Protection Association (NFPA), approximately three of every ten house fires caused by home heating equipment stem from dirty chimneys and poorly maintained fireplaces. EPA+1 The primary culprit is the buildup of creosote — a highly flammable, tar-like residue that forms when wood is burned and smoke condenses on the inside of the chimney flue.

“Creosote buildup is a hidden hazard,” said a spokesperson for the health department. “It only takes a spark or a hot ember to ignite it, and a chimney fire can quickly spread into the structure of your home.”

Data from the U.S. indicate that nearly 25,000 chimney fires occur annually, causing structural damage and loss. One recent state-wide alert noted that in Massachusetts last year, of ~1,351 heating equipment fires, nearly 500 involved chimneys and flues — many stemming from creosote accumulation.

How creosote builds up

Creosote forms when smoke vapors cool and condense on the chimney walls. Factors that accelerate the buildup include burning unseasoned (green) wood, low-temperature fires, restricted air flow, and cold flue temperatures. Over time the residue can harden, glaze, and become extremely flammable.

Key preventive steps homeowners should take

• Schedule an annual chimney inspection and cleaning by a certified technician. The Chimney Safety Institute of America advises at least yearly checks.

• Burn only dry, well-seasoned wood. Wood with high moisture content leads to incomplete combustion and more creosote.

• Ensure proper airflow — keep dampers open and avoid overloading the firebox.

• Clear the chimney cap and flue of debris, nests or blockages that can restrict smoke exhaust.

• Consider installing a chimney flue liner or insulation if the chimney tends to remain cold, which fosters creosote formation.

Why now matters

“Don’t wait until the first heavy fire in the fireplace,” the health department urged. “Take action now to keep your family safe this winter.” Homeowners are encouraged to visit the U.S. Environmental Protection Agency’s Burn Wise website at epa.gov/burnwise for additional guidance.

By addressing chimney maintenance ahead of the heating season, residents reduce the risk of fire, protect their homes and safeguard their families.