Mr. Smokestack Blog

What Causes Chimney Odors?

smelly_chimney_mr-smokestack-chimney-service_raleigh_ncHaving a fireplace can increase your enjoyment and relaxation in your home; however, sometimes, unpleasant odors can invade your house from your chimney through your fireplace. No one wants to spend time in a smelly room, so chimney odors can be inconvenient. These odors can also signify problems existing within your chimney, so when you do notice stinky smells coming from your fireplace, be sure to contact Mr. Smokestack so we can look for the cause behind the odor. If you are smelling odors in your home, you may have an issue with air pressures in your home. Any foul odors present in your home will need to be addressed because it is affecting the air quality in your home.

What are some of the causes of chimney odors? We would like to tell you about a few of the culprits behind smelly chimneys as well as how we can solve your odor problems.


According to, an online resource for homeowners and chimney professionals, creosote is the main cause behind chimney odors. With a strong, acrid smell, creosote odor tends to worsen in wet weather or in the summer when your chimney is less effective in drawing this stinky odor up and out of your chimney. Moisture makes the creosote odor even worse, so if your chimney is missing a chimney cap, you will most likely have to endure this unpleasant smell every time it rains. Our CSIA-certified chimney sweeps at Mr. Smokestack can rid your chimney of deposits of creosote buildup during an annual chimney sweeping. However, you should keep in mind that creosote can penetrate your chimney lining so there may still be odors remaining after the sweeping. One thing you can do in the summertime to keep the creosote odor out of your home is disconnecting the stove pipe and sticking a metal cap in the thimble (the hole in your chimney). Blocking off your chimney during the summer helps greatly to keep odors from seeping into your house through the fireplace.


Sometimes animals like birds, squirrels, and raccoons like to take up residence inside your chimney, and the debris and droppings from these animals can give off unpleasant odors. Even worse, an animal can become trapped and die within your chimney, and the stench of a dead animal can be unbearable. If you suspect your chimney odor is caused by either living or dead animals, call a professional animal remover to take care of this problem for you.


If your chimney is experiencing water leaks, there is a good chance mold could be growing inside your chimney. Not only does mold present a dangerous health hazard to you and your family, but it also causes that distinctive musty odor. Most people are familiar with the smell of mold, and if you do ever notice the tell-tale smell of mold coming from your fireplace, you most likely do have mold growing within your chimney. As breathing in mold can cause serious respiratory problems, you should contact Mr. Smokestack whenever you suspect mold growth in your chimney.

If you are experiencing unpleasant odors coming from your chimney, do not hesitate to contact Mr. Smokestack today. We can clean your chimney to get rid of those stinky smells.

By Robbie Markey on September 29th, 2014 | Tagged with: Tags: , , , , , | Leave a Comment

The Dangers of Creosote

Many people who use their fireplaces may have noticed an unpleasant smell occasionally coming from their chimneys. This is most likely caused by an accumulation of creosote, a chemical that is left behind in the chimney from treated wood or coal. It is important to understand that there is more to creosote than the unfavorable odor that it leaves behind in the home. If someone is exposed to it directly or it if makes its way into the environment, the chemical compound can actually be very dangerous.

Creosote is Dangerous - Raleigh NC - Mr. Smokestack

Creosote is Dangerous – Raleigh NC – Mr. Smokestack

One of the most basic concerns that people have as far as creosote in the chimney goes is that it is extremely flammable. If the creosote builds up over the years and is never cleaned out, it increases the risk of a chimney fire in the home. A spark that lights in the fireplace and catches the leftover creosote could simply cause this. In the worst cases, the fire will spread beyond the chimney and affect the entire household. Even if this never takes place, however, there are health risks associated with exposure to creosote.

Physical exposure to creosote can result in a number of different health problems, depending on exactly how the exposure takes place. If it is somehow ingested, for example, it will cause a burning sensation in the mouth and throat as well as, in some cases, severe stomach pain. When ingested, it can also cause significant damage to major organs such as the liver and kidneys. There are even health risks associated with simply touching the substance, including skin rashes and irritation. In the most severe cases, any type of exposure to creosote can result in death.

It is also important to note that creosote can enter the environment through the air and soil. If this happens, it can have a negative impact on all plants and animals with which it comes into contact. This is something to keep in mind for anyone who has pets in the home or who regularly eats vegetables that they grow indoors or in their garden. If the garden is exposed to creosote through the air or soil, anything it produces may be dangerous to ingest. This also means, of course, that pets as well as people are at risk for health problems.

Parents should keep in mind that their children may also be at an increased risk for exposure to creosote. This is because they may not wash their hands as frequently as adults and are more likely to put their hands in their mouths. If a child touches the inside of the fireplace, wood, coal or soil that has been treated with creosote, they may be at risk. In fact, exposure in children can lead to potentially lethal poisoning. It is important to make children aware of this danger and to keep them away from any treated materials.

In the case of adults, there are a few common sense ways to reduce exposure to creosote. When dealing with the chimney, fireplace or any treated materials, it is best to wear clothing that covers the hands and arms completely. After completing the task at hand, the clothing should be washed immediately and the person who wore them should wash thoroughly. There is no medical test that determines whether or not a person has been exposed to creosote, so it is necessary to take all precautions and avoid the issue completely.

Luckily, exposure to creosote is relatively low for a person that takes the proper precautions. In most cases where people suffer negative effects, they absorb the chemical through their skin. In order to avoid in a situation in which someone is at risk of creosote related health problems, have the chimney cleaned on an annual basis. Having the chimney inspected and cleaned by a chimney sweep ensures that nobody in the family will accidentally expose themselves to this harmful material.

By Robbie Markey on July 12th, 2013 | Tagged with: Tags: , , , , | Leave a Comment