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This usually happens if a stove is not working hard enough. If flue gases cool before they've exited the flue when leaving the stove, this can create condensation, which seeps back into the stove. If that condensation is allowed to sit in your stove, it can cause corrosion and rust.
Thereof, how do I stop condensation in my chimney?
Apply a salt neutraliser and replaster Then, you will need to apply a salt neutraliser before replastering. For further protection in preventing condensation and damp forming in your chimney, you can also apply a damp proof membrane. These work by stopping moisture and salts from permeating into your wall.
In this manner, what causes a chimney to sweat?
Normal Chimney Condensation When it's cold outside and the warm, humid air inside the home contacts the cold walls of the chimney, the warm air will condense on the cold surface and result in dripping. The sweating in this case is normal and will cease once a fire is built and the chimney heats up.
To make the air in your home more humid, there are a few ways to retain or add moisture.
- Set a cast-iron kettle of water on top of the stove.
- Plug in a humidifier on each level of your home.
- Stack an armload of green wood a safe distance from the wood stove.
- Weatherize your home.