17/08/2026
๐ฅ ๐๐๐๐๐๐๐ ๐๐๐๐: ๐๐๐๐ ๐๐๐๐๐๐๐ ๐๐๐๐๐ ๐๐ ๐๐๐๐๐๐๐ ๐๐๐๐๐๐๐ ๐๐๐!
A chimney isn't simply a pipe through the roof or wall.
For a wood burner to work properly, heat, draught, airflow, insulation, fuel and correct installation all have to work together.
And here's where things get interestingโฆ ๐
๐ก๏ธ ๐๐๐๐๐๐ผ๐๐๐๐ โ ๐๐๐๐๐๐๐ ๐๐๐ ๐๐๐ผ๐ ๐๐๐๐๐ ๐๐ ๐๐ผ๐๐๐๐๐
Your flue gases need to stay hot enough to rise effectively.
If a flue isn't properly insulated, those gases can cool too quickly. As they cool, they don't rise as effectively, reducing the natural draw of the chimney.
That can mean:
โก๏ธ Poorer draw
โก๏ธ Less efficient combustion
โก๏ธ More smoke and deposits
โก๏ธ Greater potential for tar and creosote build-up
๐ง ๐๐๐ ๐พ๐๐๐๐๐๐ โ๐๐๐๐ผ๐๐๐๐โ
When hot combustion gases meet a cold flue, moisture can condense inside it โ something often described as the chimney โsweating.โ
That moisture can contribute to the formation of tar and creosote deposits.
And once those deposits start accumulating, you can potentially end up with:
โก๏ธ Reduced flue capacity
โก๏ธ Poorer draw
โก๏ธ Blockages
โก๏ธ Increased chimney-fire risk ๐ฅ
๐ชต ๐๐ฉ'๐จ ๐ฃ๐ค๐ฉ ๐๐ช๐จ๐ฉ ๐ฉ๐๐ ๐๐๐๐ข๐ฃ๐๐ฎ - ๐๐ฉ'๐จ ๐ฌ๐๐๐ฉ ๐ฎ๐ค๐ช ๐ฅ๐ช๐ฉ ๐๐ฃ ๐ฉ๐๐๐ง๐
Wood that contains too much moisture has to use part of the fire's energy simply to evaporate that water.
That means a cooler, less efficient burn, more smoke and potentially more creosote formation.
For good burning, properly seasoned firewood should generally be around 20% moisture content or less.
And don't just take the seller's word for it!
๐ฅ Split it. Stack it. Keep it ventilated and protected from rain. Then test it with a moisture meter.
The moisture reading from the freshly split inside of the log is much more useful than testing the dry-looking outside.
Because wood that looks dry isn't necessarily dry enough to burn.
๐จ ๐พ๐๐๐ฟ ๐ผ๐๐ ๐ผ๐๐ฟ ๐ฝ๐ผ๐ฟ๐๐ ๐๐๐ผ๐๐๐ฟ ๐
๐๐๐๐๐
A correctly installed flue needs the appropriate tightness and correctly fitted connections.
Unwanted air entering the system can interfere with the intended airflow and chimney performance, while leaking joints can allow combustion products to escape.
And this brings us to one of the stranger things that can be found in an installationโฆ
๐ ยก๐ฅ๐ช๐ฃ๐คษนษ สษส ฦ๐ช๐คษนส วษฅส ๐ฅวสสฤฑษ ว๐ฤฑ๐ วษฅส
Yes REALLY. Some stove pipes have been fitted upside down.
Some stove connector pipes have a specific direction in which the joints should be assembled.
If they're installed incorrectly, liquid or condensed creosote can potentially run towards โ and escape through โ the joints.
Instead of staying contained inside the flue, you can end up with black, sticky tar leaking from your chimney connections.
It's not just unsightly.
๐จ It's a sign that something deserves investigating.
๐ฌ๏ธ ๐๐๐ ๐พ๐๐๐๐๐๐ ๐๐๐ โ ๐๐๐๐๐ ๐๐๐ ๐๐๐๐ฟ ๐พ๐ผ๐ ๐พ๐๐ผ๐๐๐ ๐๐๐๐๐๐๐๐๐๐
You can have a perfectly good fire, a hot flue and a correctly installed chimneyโฆ
โฆand still have problems at the top.
Wind doesn't simply travel past your chimney.
As it moves over roofs, walls and other structures, it can create areas of turbulence and changing air pressure around the chimney termination.
Get the position or termination wrong and the wind can interfere with the natural upward flow of the flue gases โ and in some conditions can even create downdraught or blowback.
The symptoms can include:
โก๏ธ Smoke being pushed back towards the stove
โก๏ธ Poor or unstable draw
โก๏ธ Difficulty lighting or maintaining the fire
โก๏ธ Smoke entering the room when conditions are windy
This is one reason why chimney height, position and the design of the terminal/cowl matter.
A chimney that works beautifully on a calm day can behave very differently when the wind starts doing its thing. ๐ฌ๏ธ
And that's where inspection matters.
Because a chimney can look perfectly acceptable from the outside while having:
โ Poor insulation
โ Incorrectly assembled joints
โ Inadequate sealing
โ Excessive cooling
โ Wet or poorly seasoned fuel being burned
โ Wind-related downdraught
โ Poor draw
โ Tar and creosote accumulation
A chimney isn't just โa hole for the smoke to get out.โ
It's a carefully balanced system.
๐ฅ GET THE HEAT RIGHT.
๐จ GET THE DRAW RIGHT.
๐ชต BURN THE RIGHT FUEL.
๐งฑ GET THE INSTALLATION RIGHT.
Because when your chimney is involved, โit seems to workโ isn't quite the same thing as โit's working safely.โ
Do you know what's actually happening inside your chimney?
