How to Avoid Chimney Fires: Essential Tips for Homeowners

 

Chimney fires can be a devastating event for homeowners, leading to extensive damage and posing serious safety risks. Understanding the causes and implementing preventive measures is crucial for maintaining a safe home environment. This article will explore effective strategies to avoid chimney fires, ensuring that your fireplace or wood stove remains a source of warmth and comfort rather than a potential hazard.

Understanding Chimney Fires

Chimney fires occur when the buildup of creosote—a highly flammable substance formed from burning wood—ignites within the chimney flue. This can lead to flames shooting out of the chimney, causing significant damage to the structure and potentially spreading to other parts of the home. Recognizing the signs of a chimney fire and understanding its causes is the first step in prevention.

Causes of Chimney Fires

1.       Creosote Buildup: The primary cause of chimney fires is the accumulation of creosote, which can ignite when exposed to high temperatures. All types of wood create creosote. 

2.       Improper Burning Practices: Burning unseasoned wood or using excessive amounts of fuel can lead to incomplete combustion, resulting in more creosote production.

3.       Obstructions: Debris, animal nests, or blockages in the chimney can restrict airflow, increasing the risk of a fire.

4.  Improper Maintenance: Lack of proper maintenance, including sweeping to remove creosote, and inspections to check the condition of the chimney, can lead to chimney fires. 

Regular Inspections and Maintenance

Annual Chimney Inspections

One of the most effective ways to prevent chimney fires is to schedule annual inspections with a certified chimney sweep. These professionals will thoroughly examine your chimney for any signs of damage or buildup and perform necessary cleanings.

What to Expect During an Inspection:

·         A thorough cleaning of the flue to remove soot and creosote.

·         An inspection with a Chimney camera, visual inspection, and a detailed condition report outlining any issues
       found.

·         Recommendations for repairs or maintenance.

Cleaning Your Chimney

Regular cleaning is essential to prevent creosote buildup. Homeowners should consider the following:

·         Frequency of Cleaning: If you use your fireplace frequently, aim for at least two cleanings per year. For occasional use, an annual cleaning may suffice. For wood stove burners: at least twice during the season. 

·         DIY Cleaning: If you choose to clean your chimney yourself, ensure you have the right tools, such as chimney brushes and rods, and follow safety precautions. This is not recommended because homeowners usually will not know how to identify problems with the chimney system. 

Proper Wood Burning Practices

Use Seasoned Wood

Burning seasoned wood is crucial for minimizing creosote buildup. Seasoned wood has been dried for at least six months, reducing moisture content to 20%, and producing less smoke.

Identifying Seasoned Wood:

·         Look for cracks on the ends of the logs.

·         The wood should feel lightweight and produce a hollow sound when struck together.

• Use a moisture meter to measure moisture content
  

Control Airflow

Understanding how to manage airflow in your fireplace or wood stove can significantly impact combustion efficiency.

·         Adjusting the Damper: Ensure the damper is fully open when starting a fire to allow for maximum airflow. Once the fire is established, you can adjust it to maintain a steady burn.

·         Avoid Overloading: Do not overload your fireplace or stove with wood, as this can lead to smoldering fires that produce more creosote.

Installing Safety Features

Chimney Caps

Installing a chimney cap can help prevent debris and animals from entering the chimney, which can obstruct airflow and increase fire risk.

·         Benefits of a Chimney Cap:

·         Keeps out rain and snow, reducing moisture buildup.

·         Prevents animals from nesting in the chimney.

Monitoring Fire Conditions

Use a Chimney Thermometer

A chimney thermometer can help you monitor the temperature of the flue gases. Keeping the temperature within the optimal range (300-500 degrees Fahrenheit) can help prevent creosote buildup.

·         Signs of Overheating: If the thermometer indicates temperatures above 500 degrees, reduce the amount of wood being burned or adjust the airflow.

Recognize Warning Signs

Being aware of the signs of a chimney fire can help you act quickly if one occurs. Look for:

·         Loud roaring or popping noises from the chimney.

·         Flames or sparks shooting from the chimney top.

·         Smoke suddenly backing up into the home.

Emergency Preparedness

Know What to Do in Case of a Chimney Fire

If you suspect a chimney fire, it’s essential to act quickly:

•     Call Emergency Services: Dial 911 immediately to report the fire.
•     Close the Damper: If safe to do so, close the damper to limit airflow and help extinguish the fire.
•     Evacuate the Home: Ensure everyone in the home is safe and evacuate if necessary.
•   Keep watch for several hours after the fire has been extinguished. Sometimes fires or heat that escape      the chimney can ignite nearby combustibles in the walls or attic and smolder for hours. 

Keep Fire Extinguishing Tools Handy

Having the right tools on hand can make a difference in an emergency:

·         Fire Extinguisher: Keep a Class ABC fire extinguisher near your fireplace or wood stove.

·         Chimney Fire Extinguishers: Consider investing in specialized chimney fire extinguishers that can be deployed in case of a fire.

Conclusion

Preventing chimney fires requires a combination of regular maintenance, proper burning practices, and awareness of potential hazards. By following these guidelines, homeowners can enjoy the warmth and comfort of their fireplaces and wood stoves while minimizing the risk of fire. Remember, safety should always be a priority, and when in doubt, consult with a professional to ensure your chimney is in optimal condition.

By taking proactive measures, you can protect your home and loved ones from the dangers of chimney fires, ensuring a safe and enjoyable heating experience throughout the colder months.
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Marge Padgitt is a seasoned veteran in the chimney industry, with over 40 years of experience. She is the author of Your House is Killing You, Wood-Fired Heating and Cooking, and The Chimney and Hearth Pro's Resource Book. Reach her at www.chimkc.com or email margepadgitt@gmail.com. 

How to Maintain a Masonry Chimney

 

Maintaining a masonry chimney is essential for ensuring its longevity and functionality. A well-maintained chimney not only enhances the aesthetic appeal of your home but also plays a crucial role in the safety and efficiency of your heating system. This comprehensive guide will walk you through the various aspects of chimney maintenance, from identifying signs of damage to performing regular inspections and repairs.

Understanding the Importance of Chimney Maintenance

Chimneys are exposed to various environmental factors, including rain, snow, and extreme temperatures, which can lead to deterioration over time. Regular maintenance is vital for preventing costly repairs and ensuring the safety of your home. Here are some key reasons why chimney maintenance should be a priority:

Safety Concerns

A poorly maintained chimney can pose serious safety hazards, including the risk of chimney fires and carbon monoxide poisoning. Creosote buildup, a byproduct of burning wood, can ignite and cause a fire within the chimney. Regular cleaning and inspections can help mitigate these risks.

Structural Integrity

Over time, moisture can seep into the masonry, leading to cracks and deterioration. If left unaddressed, these issues can compromise the structural integrity of the chimney, potentially leading to costly repairs or even collapse.

Efficiency

A well-maintained chimney ensures proper ventilation for your fireplace or heating system. Blockages or damage can hinder airflow, reducing the efficiency of your heating system and increasing energy costs.

Signs of Damage to Look For

Being proactive in identifying signs of damage can save you from more extensive repairs down the line. Here are some common indicators that your chimney may need attention:

Cracks and Gaps

Inspect the exterior of your chimney for visible cracks or gaps in the bricks or mortar joints. These can develop due to thermal expansion, settling of the foundation, or freeze-thaw cycles. Addressing these issues promptly can prevent further damage.

Spalling Bricks

Spalling occurs when the surface of the bricks begins to flake or chip away, exposing the inner layers. This can be caused by moisture infiltration, rain, and freeze-thaw cycles. Spalling not only affects the appearance of your chimney but also compromises its structural integrity. If you see spalling bricks, have them replaced. If a large area of the chimney is spalling it may need to be rebuilt. Soft bricks are more susceptible to moisture penetration than hard bricks, but unfortunately, builders use soft bricks in many cases because they are less expensive. 

Effleorescence

Efflorescence

Efflorescence appears as white stains on the chimney surface, caused by the migration of salts to the surface due to moisture evaporation. While not harmful in itself, it can indicate underlying moisture issues in the interior that need to be addressed. In most cases, efflorescense is seen on the utility flue side where the water heater, furnace, or boiler are located. Inspection of the interior flues in the chimney are critical to check for washed out mortar joints, gaps, or even missing flue tiles, and properly sized flue liners. 

Water Stains

Look for water stains on the ceiling or walls near the chimney. These can indicate leaks caused by damaged flashing or deteriorated chimney crowns. If left unchecked, water intrusion can lead to mold growth and wood rot. The chimney should be inspected by a professional, who knows how to do leak checks and find the source(s) of the problem. 

Smoke and Odors

If you notice smoke or unpleasant odors entering your home when using the fireplace, it may indicate blockages or airflow problems. Common causes include creosote buildup or debris obstructing the flue.

Regular Inspections: A Key Component of Maintenance

Conducting regular inspections is crucial for identifying potential issues before they escalate. Here’s how to approach chimney inspections:

Frequency of Inspections

It is recommended to have your chimney inspected at least once a year by a qualified professional chimney sweep. This ensures that any signs of damage or deterioration are caught early.

What to Expect During an Inspection

During a professional inspection, the technician will assess the condition of the chimney structure, check for signs of damage, and recommend necessary repairs or maintenance. They will also inspect the flue for blockages, make sure the damper is functioning correctly, check for proper sizing of the flue liner, inspect the smoke chamber, ensure that the chimney cap is in good condition and more. A pro will use a chimney camera system to inspect the interior of the chimney and provide a written report with photos. 

Cleaning Your Chimney

Regular cleaning is essential for maintaining the safety and efficiency of your chimney. Here’s how to approach chimney cleaning:

When to Clean

Schedule a professional chimney cleaning at least once a year, or more frequently if you use your fireplace or wood-burning insert regularly. If you notice a buildup of soot or creosote, it’s time for a cleaning.

DIY Cleaning Tips

If you choose to clean your chimney yourself, ensure that you have the proper tools, including a properly sized chimney brush, a vacuum, tarps, and protective gear. Start by removing the fireplace grate and any ashes, then use the brush to scrub the flue from top to bottom. Note: we do not recommend doing this job yourself unless a pro is not available. 

Waterproofing Your Chimney

Applying a waterproof treatment can help protect your chimney from moisture damage. Here’s what you need to know:

Benefits of Waterproofing

Waterproofing helps prevent water absorption, which can lead to brick deterioration and weakening or deterioration of mortar. It is recommended to reapply the sealant every 2-5 years or when water no longer beads up. Professional chimney sweeps have access to professional-grade water repellent that is not available to the public.

Installing a Chimney Cover

A chimney cap serves as a protective barrier against rain, snow, debris, and animals entering your chimney. Here’s why it’s important:

Benefits of a Chimney Cover

A properly installed chimney cap helps prevent moisture damage and reduces the risk of chimney fires caused by debris buildup. It also keeps birds and animals from entering your chimney and making flammable nests or blockages.

Maintenance of the Chimney Cover

Regularly inspect the chimney cap to ensure it is securely in place and free of debris. If you notice any damage, consider replacing it promptly.

Monitoring for Damage

Being vigilant about monitoring your chimney can help catch issues early. Here are some tips:

Visual Inspections

Conduct monthly visual inspections of your chimney and fireplace. Look for loose bricks, cracks, or signs of water damage. If you notice any issues, contact a professional for further assessment.

Seasonal Maintenance

Perform seasonal maintenance checks, especially before and after the burning season. In the spring, inspect and clean your chimney to remove smelly creosote and assure it is ready for fall. Also check for any damage that may have occurred during the winter.

Safe Burning Practices

Practicing safe burning techniques can help minimize creosote buildup and protect your chimney. Here’s how:

Use Seasoned Wood

Always use seasoned hardwoods in your fireplace or wood-burning stove. These woods produce less creosote compared to unseasoned or softwoods, however, all wood creates creosote that must be removed at some point. Do not burn hedge or dry pine because these woods burn very hot and fast and can lead to a chimney fire. Check moisture content with a moisture meter and make sure it is at or under 20%. 

Avoid Burning Trash

Never burn trash, cardboard, wrapping paper, railroad ties, or other materials that can release harmful chemicals and contribute to chimney damage. Stick to burning only dry, seasoned wood.

Scheduling Professional Repairs

If you notice significant damage or structural issues with your chimney, it’s essential to contact a certified chimney professional for repairs. Here’s what to consider:

Choosing a Professional

Look for a chimney service provider with experience and positive reviews. Ensure they are certified and knowledgeable about masonry repairs.

Importance of Timely Repairs

Addressing chimney issues promptly can prevent further damage and ensure the safety and efficiency of your heating system. Don’t wait until minor problems escalate into major headaches.

Conclusion

Maintaining a masonry chimney is crucial for ensuring its longevity, safety, and efficiency. By conducting regular inspections, cleaning, and addressing any signs of damage promptly, you can keep your chimney functional for years to come. Remember, when in doubt, consult a professional to ensure that your chimney remains a safe and reliable part of your home.

By following these guidelines, you can enjoy the warmth and ambiance of your fireplace with confidence, knowing that your chimney is well-maintained and safe for use.

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Marge Padgitt is the co-owner of HearthMasters and HearthMasters Publishing. She was a Certified Chimney Sweep from 1990-2004, and an NFI Certified Woodburning Specialist from 2003-2024, when she semi-retired from contracting. Marge is the author of Wood-Fired Heating and Cooking, Your House is Killing You, and The Chimney and Hearth Pro's Resource Book. www.chimkc.com 

Chimney Fire in Prairie Village, KS Captured on Camera

 

A chimney fire occurred in February of 2023 in the 4600 block of West 82^nd St, Prairie Village Kansas. The neighbor captured photos of the fire department putting out the fire and sent them to us. The neighbor happens to be a client of HearthMasters. Since it is not common to get photos of chimney fires while they are in progress, we decided to post this event in order to warn people about the dangers of chimney fires.

Chimney fires occur when flammable creosote ignites inside a smoke chamber or flue due to an errant spark, a fire that is too large, or the use of paper, which can be pulled upward by draft and ignite the creosote. The amount of creosote inside the flue, along with draft, will determine how long the fire keeps going.

Most chimney fires are extinguished by expanding creosote, and often homeowners are unaware that they occurred. The damage may be found later by a chimney sweep. The interior and exterior of a chimney may be severely damaged by expansion and contraction caused by the heat of a chimney fire, making it unusable, and causing thousands of dollars of damage. Chimney fire damage is covered by homeowner’s insurance.

Some chimney fires are noticed at the time the occur, and that is when the fire department is called to put it out. Homeowners should always call the fire department when a fire occurs because it might not be contained inside the chimney if there are any breechings in the masonry or if combustible framing is incorrectly installed next to the chimney, which unfortunately happens too often. 

One of our customers stayed up all night watching his house after a chimney fire occurred, and had to call the fire department back three times because it kept reigniting combustible framing in the wall area. Had he not stayed up the house may have burned completely, 

After a chimney fire has occurred, the chimney should be inspected by a qualified professional chimney sweep using a chimney camera. If damages are found, which is very likely, the sweep should document the damages with photos and a written evaluation report for insurance purposes. Homeowners should not attempt to remove burnt creosote or do an inspection themselves.

Close up of firemen on the roof

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Marge Padgitt is president of HearthMasters, Inc. in Independence, Missouri. She is the author of The Chimney and Hearth Pro's Resource Book and Wood-Fired Heating and Cooking. www.chimkc.com 

Holiday Decor Ideas for Fireplaces 2022

During the holidays, people usually place decor on mantels and around the focal point of the house - the fireplace. Here are some inspiring ideas. Remember to keep stockings away from the front of the fireplace as they can be a fire hazard, and never burn a Christmas tree in the fireplace because they burn too hot and too fast and can cause a house fire. 

Fireplace not working? No problem - use candles for a welcoming atmosphere. 

Above and left: These faux fireplaces work great for focal points for your holiday decorations. 

Real fireplace - real fire - and nice decor without any stockings hanging down in front of the fireplace. We give this one an A+!

Whoops!  Looks nice, but do you see the problem? 

A stunning historical fireplace that is nicely done

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Marge Padgitt is the president of HearthMasters, Inc. and author of Wood-Fired Heating and Cooking. www.woodfiredpub.com or www.chimkc.com. Sign up for blog notices so you don't miss an article!

How to avoid chimney fires

Chimney fires occur during cold weather months when people use their chimneys. A chimney fire occurs when accumulated creosote in a flue or smoke chamber ignites from a spark.

All wood creates creosote - even dry hardwoods- so it is imperative that flues serving fireplaces or wood-burning stoves, or fireplace inserts are swept regularly to remove this flammable substance. The NFPA recommends sweeping once per year for fireplaces, and at least twice during the season for heating appliances (wood stoves or inserts). A house fire can occur if the fire in the chimney escapes the flue liner or if burning embers fly out of the top of the chimney onto the roof. (Asphalt roofs can catch fire as well as wood shingle roofs). 

Most chimney fires are of short duration and go unnoticed by the homeowner - with damages usually found later during an inspection by a chimney sweep. 

 

Signs of a chimney fire:

•  Loud whooshing or roaring or freight train like sound
•  Flames shooting out the top of the chimney
•  Red glowing stove pipe
•  Backup of smoke into the house
• Sudden poor draft

It is a good idea to keep a chimney fire extinguisher near your fireplace or wood stove and use it if you notice a chimney fire, then get out of the house and call the fire department immediately. Fire can spread to nearby combustibles and cause a house fire. Be sure to keep an eye out for smoke smell or flames even after the fire department is gone because interior wood framing could smolder for hours afterwards and ignite if it gets enough oxygen. 

 

Blown out section of tile liner

After the fire: Call your local professional chimney sweep to have a thorough inspection and any needed repairs completed before using the appliance again. Most chimneys are severely damaged on the interior during a chimney fire and should not be used until inspected by a qualified professional. Any breaks or blown out sections in flue tiles or warped or buckled seams in steel liners or chimneys can be a fire and Carbon Monoxide hazard.

For more information about Carbon Monoxide, visit COHeadquarters.com.

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The Chimney Lady, Marge Padgitt, is a veteran chimney professional, trainer, and author. She is the co-owner of HearthMasters chimney and fireplace service in Kansas City, Missouri. Contact her at office@chimkc.com.

Tis the Season for Chimney Fires

 

By Marge Padgitt

Chimney Fire: Source: Marlboro FD, VA

It’s that time of year again – the season for chimney fires. As a chimney and fireplace service company we see the results of the lack of proper maintenance and improper installation that can cause fires and destruction of property, and in some cases injury or death. Chimney fires are preventable and should be avoided because of the risk that they could escape the chimney and catch the house on fire.  

All types of wood – even hardwood- creates creosote when burned. It accumulates on flue and smoke chamber walls and must be periodically removed. Chimney sweeping should be done by a professional chimney sweep who has the proper equipment to do the job right. First, tarps and a vacuum are set up. Then the sweep brushes the flue with wire brushes for masonry flues, or poly brushes for metal flues, and removes the creosote from the flue and fireplace or wood stove. Next, the sweep should run a chimney camera through the chamber and flue to inspect it and make sure there are no broken flue tiles, missing mortar, or blockages, or in the case of a manufactured fireplace or stove, that all of the metal pipe seams are solid and unwarped. The chimney sweep will then do a visual inspection of the interior and exterior chimney, check for proper clearance to combustibles and proper installation of components, then provide a report on its condition.

Chimney sweep  Source: Adobestock.com

It is very common for repair issues to arise with any type of chimney. Regular maintenance is
needed in order to keep the system functioning properly. Exterior masonry repairs should be done in the spring or summer, but if the chimney needs a new flue liner this can be done any time of year. Chimney fires can cause costly damage to a masonry or metal chimney system. If relining is necessary, it will cost thousands of dollars. Fortunately, chimney fires are covered by homeowner’s insurance. However, it is best to avoid a chimney fire in the first place.  

According to the U.S. Fire Administration there were 83,300 house fires caused by heating in 2018.  The National Fire Protection Association’s latest press release dated November 22, 2010 estimates that 66,100 home fires caused 1.1 billion in property damage, 1,660 injuries and 480 deaths in 2008, which was a 0.5% decline from 2007.  15,200 (23%) of all home heating fires are creosote fires, which the NFPA calls “failure to clean” fires that were confined to a chimney or flue, or involved solid-fueled space heaters, chimneys, connectors, and fireplaces.  See the entire news release at www.nfpa.org

Tips:

1.       Never burn a dry Christmas tree in a fireplace.

2.       Only burn dry, seasoned hard or soft cordwood in a stove or fireplace

3.       Only burn one piece of hedge to two pieces of other types of wood.

4.       Have the chimney inspected and swept annually, or twice per season if using a wood stove.

5.       Have a Draw Collar installed for hard-starting wood stoves.

6.       When purchasing a new home have the chimney inspected by a CSIA Certified Chimney Sweep prior to closing so you know what you are getting into.

7.       If you hear a whooshing sound, or freight-train like sound, or the room fills with smoke, get out of the house and call the fire department. Go outside and see if flames are shooting out the top of the flue.

 

See more information about chimney and fireplace maintenance and how to choose an appliance in Marge and Gene Padgitt’s new book Wood-Fired Heating and Cooking: How to choose, maintain, and operate a wood-burning appliance at Amazon.com or hearthmasters.net.