A buildup of creosote is the main reason that it’s important to have your chimney cleaned and inspected annually, but did you know that there are three stages of creosote? Tar, soot, and creosote are all byproducts of wood burning, and “creosote” is what the mix of the three components is usually called. What’s needed to properly clean your chimney depends upon what level of creosote there is on the flue lining. Creosote in all of its forms is dangerous because it can cause chimney fires.
First Stage
Creosote which contains a high percentage of soot is the first stage of the substance. This type of creosote is easier to remove from your chimney than the other kinds. All that is needed to remove first-stage creosote is a chimney brush.
The way to end up with the easiest creosote to clean is to burn seasoned wood in an environment in which there is plenty of air so that the flue is warmed by the fire’s heat. If a house is sealed too tightly, there may be a restriction in the air supply in the fireplace, which can cause more smoke to enter the home and can keep the chimney flue from getting properly heated.
Second Stage
Creosote in the second stage is a bit more complicated to remove than first-stage creosote. The second-stage variety is a buildup of hard, shiny black flakes, which contain hardened tar. This type is best removed using a rotary loop. This piece of equipment is a stainless steel cable attached to a hub which has metal rods that are turned by a special type of powerful drill, and it works effectively.
Second-stage creosote is the type that is formed in the above-mentioned scenario when there is a restriction to the amount of incoming air. It’s not unusual for people to get this type of creosote if they have glass doors on their fireplace or wood stove.
Third Stage
Third-stage creosote is a tough problem to deal with, and it’s not unusual for people to replace their flue liners in order to be rid of it. This kind of creosote looks like tar running down the inside of your chimney. It’s a highly concentrated fuel which hardens and can form a thick layer when recoated repeatedly.
The cause of third-stage creosote is burning wood when the flue isn’t warmed and temperatures in the flue are too low. Deposits of third-stage creosote are also the result of incomplete combustion.
To avoid having to deal with third-stage creosote, avoid burning unseasoned firewood and make sure there is enough air for combustion to occur in the fireplace. Another cause of this problematic type of creosote is attaching an appliance to an oversized flue. There are restrictions on the size a flue should be for a wood-burning appliance. It’s best to hire a professional to install fireplace inserts and wood stoves, to make sure everything operates properly.
Third-stage creosote easily catches fire, which is dangerous. Chimney fires can lead to house fires. But if this kind of creosote does burn, it’s easier to remove, since it takes on a different form.
It’s very difficult to remove third-stage creosote. A rotary head with chains can typically get the job done and is a safe method but any cracked tiles which already existed may show up as a result of the chains and the procedure is often blamed.
There are chemicals which do a fair job of removing third-stage creosote.
A chimney inspection can help determine if any creosote build-up is in your chimney. Whatever type of creosote is in your chimney, let our professional chimney sweeps eliminate this safety hazard from your home. Get in touch for a Chimney Inspection today.