13 Jan 2024
Chimney fire blog

As the weather gets colder and the cosy crackling of a fireplace becomes more inviting, it’s important to be aware of the hidden dangers that can lurk in our chimneys. Chimney fires are more common than you might think and can cause devastating damage to your home and put your family at risk.


In this article, we will delve into the alarming facts and lesser-known risks associated with chimney fires, equipping you with the knowledge you need to keep your loved ones and property safe. From the causes and warning signs to preventive measures and maintenance tips, we’ll explore every aspect of chimney fire prevention.


Whether you use your fireplace regularly or occasionally, understanding the hidden dangers and taking preventive steps is crucial. Don’t wait until it’s too late to educate yourself about chimney fires and their potential hazards. Stay informed and empowered to protect your home and loved ones.


Join us as we uncover the unseen dangers of chimney fires and learn how to safeguard your home from this potentially catastrophic risk.

A total of 3,243 ‘reported’ chimney fires occurred in England, Wales and Scotland in 2022/23, with around 40% of chimney fires taking place in England between January and March.

What is a chimney fire?


Chimney fires are a terrifying and potentially destructive occurrence that can happen in any home with a fireplace. Understanding how chimney fires start and spread is the first step in preventing them.


Chimney fires occur when there is a buildup of flammable substances, such as creosote, in the chimney. Creosote is a highly combustible substance that forms when wood or fossil fuels are burned. Over time, creosote can accumulate on the inner walls of the chimney, creating a dangerous situation.


When a fireplace or stove is lit, the intense heat can cause the creosote to ignite as well. This can result in a fast-spreading fire that can quickly engulf the entire chimney and even spread to the rest of the house. It’s important to understand that chimney fires can happen without any obvious signs or warning. This is why regular maintenance and inspections are crucial to prevent these hidden dangers.


Chimney Fire

What are the signs of a chimney fire?


Detecting a chimney fire can be challenging since it often occurs inside the chimney and may not be immediately visible. However, there are some signs that can indicate a chimney fire has taken place.


One of the most common signs of a chimney fire includes the sound and sensation of air surging through the room as the fire draws in oxygen. Residents have likened the sound of the air rushing to fuel the chimney fire to that of a jet engine preparing for takeoff.


Another sign of a chimney fire is dense smoke or flames coming from the top of the chimney. This can be an indication that there is a fire burning inside the chimney.


In some cases, chimney fires can cause visible damage to the exterior of the chimney, such as cracks or gaps in the masonry. If you notice any signs of damage to your chimney, it’s important to have it inspected by a professional as soon as possible.


What are the causes of chimney fires?


Understanding the causes of chimney fires is essential for preventing them. While creosote buildup is the primary cause of chimney fires, there are several factors that can contribute to its formation.


One of the main causes of creosote buildup is burning unseasoned or wet wood. When wood has a high moisture content, it produces more smoke and releases more unburned particles. These particles can then condense on the inner walls of the chimney, forming creosote.


Another common cause of chimney fires is restricted airflow. If the chimney is not properly designed or if there are obstructions such as nests or debris, it can restrict the airflow and cause smoke and gases to linger in the chimney. This can lead to the formation of creosote and increase the risk of a chimney fire.


Using improper fireplace techniques, such as overloading the fireplace with too much wood or closing the damper too soon, can also contribute to the formation of creosote and increase the risk of a fire.


a dirty chimney before and after

What are the dangers of chimney fires?


Chimney fires can have devastating consequences for both your home and your family’s safety. Understanding the dangers associated with chimney fires is crucial for taking preventive measures and protecting your loved ones.


One of the most immediate dangers of a chimney fire is the risk of the fire spreading to the rest of the house. The intense heat and flames from a chimney fire can quickly ignite nearby combustible materials, such as walls, ceilings, and furniture, turning a small fire into a full-blown house fire.


Chimney fires can also cause structural damage to the chimney itself. The extreme heat can crack or collapse the chimney, leading to costly repairs or even the need for a complete chimney rebuild.


In addition to the immediate dangers, chimney fires can also have long-term effects on your health. The smoke and gases produced by a chimney fire can contain toxic substances, such as carbon monoxide, which can be harmful if inhaled. Prolonged exposure to these toxins can have serious health consequences.



Preventing chimney fires – regular maintenance and inspections.


The best way to prevent chimney fires is through regular maintenance and inspections. By taking proactive measures, you can significantly reduce the risk of a chimney fire and ensure the safety of your home and family.


One of the most important steps in preventing chimney fires is to have your chimney professionally cleaned and inspected at least once a year. A professional chimney sweep will remove any creosote buildup and identify any potential issues that could lead to a fire.


In addition to annual cleanings, it’s also important to perform regular visual inspections of your chimney. Look for signs of damage, such as cracks or gaps in the masonry, and address them promptly to prevent further issues.


Using the right type of fuel is another key factor in preventing chimney fires. Make sure to use only seasoned wood or approved alternative fuels that produce minimal smoke and combustion byproducts. Avoid burning materials like paper, cardboard, or trash, as these can contribute to creosote buildup.


Proper fireplace techniques are also essential for preventing chimney fires. Avoid overloading the fireplace with too much wood and correctly control the airflow. It’s also important to NEVER allow the fire to ‘tick’ over through the night by closing the air vents.


Brush from pot in London 

Chimney fire safety tips

While preventive measures are crucial, it’s also important to be prepared in case of a chimney fire. Here are some safety tips to keep in mind:

  1. Have the chimney professionally cleaned at least every year.
  2. Install smoke detectors and carbon monoxide detectors near your fireplace and throughout your home.
  3. Have a fire extinguisher nearby and make sure everyone in the household knows how to use it.
  4. Create and practice a fire escape plan with your family.
  5. Never leave a fire unattended, and always make sure it is completely extinguished before leaving the house or going to bed.
  6. Keep flammable materials, such as curtains, furniture and fuel, a safe distance away from the fireplace.


What to do in case of a chimney fire


If you suspect a chimney fire, it’s important to act quickly and take the necessary steps to protect your loved ones and property.


The first thing to do is to evacuate everyone from the house and call the fire brigade. Do not attempt to extinguish the fire yourself, as chimney fires can be unpredictable and dangerous.


Once the fire has been extinguished, it’s essential to have the chimney swept, inspected and leakage tested by a professional before using the fireplace again. The extremely high temperatures can damage the flue, which can cause fumes to leak.


Chimney inspection 

The importance of proper design and installation.


Proper installation and design play a vital role in preventing chimney fires. A well-designed chimney will provide proper airflow, minimising the risk of creosote buildup and ensuring efficient combustion.


When installing a stove or fireplace, it’s essential to work with a qualified professional who understands the principles of chimney design and can ensure that the chimney meets all safety regulations.


The size and height of the chimney, as well as the materials used, are important considerations. A chimney that is too short or narrow can impede proper airflow, while using the wrong materials can increase the risk of heat transfer and structural damage.


Investing in a specialised professional from the start can save you from potential problems and ensure the long-term safety and efficiency of your fireplace.



Does insurance cover chimney fires?



While taking preventive measures is crucial, it’s also important to ensure that you have adequate insurance coverage in case of a chimney fire.


It’s essential to review your policy and understand whether your homeowner’s insurance policies typically cover damages caused by chimney fires, including the cost of repairs and restoration, the specific coverage limits and exclusions.


To ensure that you have sufficient coverage, consider contacting your insurance provider to discuss your policy and make any necessary adjustments. It’s better to be prepared and have peace of mind knowing that you are protected in case of a chimney fire.




Regular professional inspections and annual sweeping of the fireplace significantly reduce the likelihood of a chimney fire. Ensuring that the flue is clean and constructed appropriately while adhering to proper distances from combustible materials virtually eliminates the need to ever encounter a chimney fire.


Keep your home and family safe; arrange an appointment today with SweepSmart