How to Put Out a Chimney Fire (And What to Do Immediately After)
A chimney fire is not just a “fireplace issue.” It’s a structural emergency.
Many homeowners assume that if flames aren’t shooting out of the top of the chimney, everything is fine. Unfortunately, that’s not always true. Some chimney fires are dramatic and obvious. Others burn slowly and quietly inside the flue, damaging the liner and surrounding structure without you ever realising it.
According to the National Fire Protection Association, heating equipment remains a leading cause of residential fires in the United States. The majority of chimney-related fires are linked to creosote buildup and lack of maintenance, both of which are preventable.
This guide will walk you through what’s happening inside your chimney during a fire, what to do in the moment, and what steps to take immediately afterward to protect your home and your family.
Everything Homeowners Must Know about Chimney Fires
When you burn wood, smoke rises through your chimney. As that smoke cools, it condenses along the inner walls of the flue and forms a substance called creosote. Creosote is highly flammable. Over time, it can accumulate in thick, tar-like layers.
When temperatures inside the flue get high enough, often from a hot, long-burning fire, that creosote can ignite.
A chimney fire can burn at temperatures exceeding 2,000°F. At those temperatures:
● Clay flue tiles can crack or split.
● Stainless steel liners can warp.
● Mortar joints can deteriorate.
● Heat can transfer to the framing inside the walls or attic.
Even if the fire seems brief, the structural damage can be long-lasting.
How to Know If You’re Experiencing a Chimney Fire
Some chimney fires are impossible to miss. You may hear a loud roaring sound, similar to a freight train passing through your home. You might see sparks or flames shooting from the chimney top. Thick smoke may fill the air.
Other times, it’s more subtle. You may notice a strong, unusual odor. Pieces of creosote may fall into the firebox. Weeks later, during an inspection, cracked liner tiles may reveal that a slow-burning chimney fire occurred without you ever knowing.
The danger in a “quiet” chimney fire is that homeowners continue using the fireplace afterward, unaware that the venting system has been compromised.
What to Do Immediately If You Suspect a Chimney Fire
The most important step is to treat the situation as an emergency.
Call 911 immediately. Even if the fire appears contained inside the chimney, it can spread into concealed spaces such as attic framing or wall cavities. Firefighters have the tools to check for hidden extensions.
While waiting for emergency responders, reduce the oxygen feeding the fire. Close the fireplace damper, shut any glass doors, and turn off HVAC systems that may circulate air. Fire needs oxygen to grow. Limiting airflow can help reduce intensity.
If you have a chimney fire suppressant product designed specifically for this purpose, you may use it according to the manufacturer’s instructions.
One critical mistake homeowners make is throwing water into the fireplace. Sudden temperature changes can crack masonry or create steam expansion that worsens structural damage. Avoid this at all costs.
Above all, prioritize safety. If smoke spreads indoors or you feel unsafe, leave the home and wait for professionals.
What Happens After the Flames Are Gone
Here’s where many homeowners make a costly mistake: they assume that if the visible fire is out, everything is fine.
Although the visible fire may seem to be out, surely it can severely damage the internal structure of the chimney.
Homeowners should not use their fireplace again until it has been professionally inspected.
Industry standards require what’s known as a Level 2 chimney inspection after a chimney fire. This involves a detailed visual assessment along with video scanning of the flue liner to detect cracks, separations, and heat damage.
Damage may include:
● Hairline fractures in clay liner tiles
● Warped or separated stainless steel liner sections
● Compromised chimney crowns
● Heat transfer damage to nearby framing
These issues may not be visible from the ground, or even from inside the firebox.
Why Chimney Fires Happen in the First Place
Most chimney fires develop slowly over time due to creosote accumulation. Burning unseasoned (wet) wood produces more smoke and accelerates buildup. Restricted airflow, improper drafting, and skipped annual cleanings further increase risk.
A fireplace system is not self-maintaining. Even if you only use it occasionally, creosote can accumulate enough to create a hazard.
Regular chimney inspections and cleanings dramatically reduce the likelihood of a chimney fire.
The Insurance and Liability Side After A Chimney Fire
After a chimney fire, documentation matters a lot because insurance providers require proof of professional inspection before approving the repair claims.
A certified inspection report conducted by professional chimney experts protects the structure of your home and saves you from any legal matters as well.
The Bigger Picture: Your Chimney Is a System
Your chimney isn’t just brick and mortar or some aesthetic addition to your home. It’s a venting system designed to safely carry combustion gases out of your home and keep your place warm and cozy during the cold season. When that system is compromised, there are major risks associated with it including –
● House fires
● Carbon monoxide exposure
● Smoke damage
● Structural instability
That’s why professional evaluation after a chimney fire is not optional—it’s essential.
How to Prevent a Future Chimney Fire
The safest chimney is one that is maintained before problems begin.
Annual inspections, routine cleaning, burning properly seasoned hardwood, and installing a chimney cap are simple steps that significantly reduce fire risk.
When creosote is removed regularly during chimney cleaning, it doesn’t get the opportunity to ignite.
Conclusion
A chimney fire is a warning sign. It indicates that something inside the system was unsafe long before the flames appeared.
If you ever experience one:
● Call emergency services immediately.
● Limit airflow safely.
● Do not reuse the fireplace.
● Immediately schedule a professional Level 2 inspection.
At A Step in Time Chimney Sweeps, we believe education is part of safety. Our role isn’t just to clean chimneys, it’s to help homeowners understand how their systems work and how to protect them.
If you suspect past chimney fire damage or want peace of mind before your next burn season, schedule a professional inspection with us.
Connor H.
Connor is expert in understanding various chimney cleaning, repair and every aspect of chimney.
