To say creosote is a minor problem would be an understatement. Creosote is neither rare nor harmless. Every wood-burning fire that you burn in your fireplace and chimney system produces smoke that rises up the chimney. The smoke is filled with hot gases, particles, soot, and creosote that covers the chimney interior. Though soot can be corrosive to the chimney liner and masonry, creosote presents a whole different set of problems.
Soot is made up of carbon, but creosote is made up mostly of tar–a sticky substance that is also flammable. Because of the sticky nature of creosote, it collects easily in a chimney, covering parts, clogging the clean out area, and creating a fire hazard. As the creosote builds up, it can become a serious obstruction–and when it reaches stage 3 buildup it is also difficult to remove.
Stage 3 Creosote
Stage 3 creosote, also called glazed creosote becomes a problem only when the chimney isn’t cleaned regularly. When the creosote isn’t removed on a regular basis, it builds up. When it becomes heated, the creosote boils, causing all the moisture in it to evaporate, and leaves a hardened mass of condensed fuel in the flue. Once it reaches this stage, the creosote can’t be brushed away during a standard chimney sweep. It decreases the chimney’s efficiency, increases the amount of creosote produced by the inefficient fire, and raises the risk of flue fire.
Creosote will not damage the chimney when it is cleaned regularly and properly. Once creosote reaches stage 3 buildup it can be difficult to remove without damaging the liner. You cannot remove it with brushes and a homeowner or handyman attempting to do so with tools will cause damage. Additionally, if it isn’t removed, the glazed creosote can cause a creosote fire that damages the masonry, the liner, and even the structure of the chimney. If you suspect a flue fire, you should call a chimney professional for an assessment right away.
Prevent Creosote Buildup
You cannot stop creosote altogether, but you can prevent dangerous buildups.
Schedule Regular Chimney Sweeps – Your chimney sweep appointments will keep your chimney working properly and the chimney professional will assess it with each appointment.
Burn Properly Seasoned Wood – Burning wet or “green” wood that is freshly cut will drop the efficiency of your fireplace. Green wood is harder to light and burns with less heat, often burning incompletely. This leads to more creosote. Burn only properly seasoned firewood in your fireplace to keep your chimney system working properly.
When you do have a creosote buildup in your chimney, it’s important to call the professionals for proper and safe removal. Billy Sweet Chimney Sweep technicians use an industrial product to remove the creosote without damaging the liner and then we clean the entire flue.
Give us a call before you try to remove creosote yourself. It’s harmful to breathe, may irritate your skin, and can destroy your flue if it results in a fire.
Talk to a professional today at 617-469-4528.