Creosote and the damage it can do

Creosote is a flammable and corrosive material that can build up over time on the walls of your firebox and flue system. In it's worst form it is a gooey, bad smelling, corrosive and combustible material. It happens when unburned wood particles, ash and other gases mix as they exit the flue system.

Ongoing burning of unseasoned fuel and incorrect operation of the appliance on a low burn setting will promote creosote build-up. As the build up progresses, it will start corrosion of the flue pipe and potentially the flue spigot and upper burn chamber and in worst cases, could result in the failure of your firebox and flue system or even a flue fire.

Burning dry well seasoned fuel, maintaining a bright burning fire and regular flue system/firebox servicing will all assist with the longevity of your appliance.

Burning dry wood produces a cleaner burn with less smoke and emissions. Less smoke means less creosote.
Burn the smoke and you burn the gases.

Creosote can condense onto the inner walls of your flue pipe and firebox, which then dries and gradually hardens into one of the three stages below.

• Stage 1 creosote, which is like a velvety soot
• Stage 2 creosote, which is porous and crunchy
• Stage 3 creosote, which is a shiny, rock hard glaze

Layers of creosote accumulate quickly when previous creosote doesn’t dry completely. The new layers then insulate the previous deposits from the heat that dries them. This results in a heavy buildup of gooey creosote that solidifies. This creates the solid material known as ‘flue glaze’.

Flue systems need to be cleaned to remove creosote and soot deposits. This will prevent corrosion of the flue system and/or firebox and improve the draw of the flue system as well. How often the flue system is cleaned depends on how frequently the wood burning appliance is used, how it is operated and the type of installation.

Creosote is very corrosive and excessive buildups will result in the flue pipe and potentially the flue spigot and upper burn chamber failing. Failure of the flue pipe or firebox due to creosote build up is not covered under warranty as creosote build up is only possible from either unseasoned fuel or incorrect operation of the appliance, or a combination of both