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Chimneys & Fireplaces Question
Flue liners - does it matter which way up they are installed?
I have had a 6" flue liner installed for a log burning stove. I understand that some liners have arrows on them to show which way up they should be fitted - This liner doesn't have the arrows, but looking on line, it has been installed the internal gills opening upwards rather than down - does this matter?
Thanks for answers.
Yes all liners have a direction which they should be installed regardless if they have arrows printed/stamped on them or not. The liners are essentially two interwoven spirals of steel. Where the liner flexes to accommodate a bend, or in some cases where it catches on internal masonry it will often bend out the internal skin slightly - this in itself is not an issue as long as the liner is installed the correct way round.
If you look up the liner or take a picture from the bottom and you can see the underside of this lip, then it is fine as any water coming down the chimney will simply roll off and continue to the bottom. If the liner is upside down these lips would allow small upward facing pockets which would collect water, and likely lead to premature liner failure.
Chimney Care and Repair.
Answered 21st Aug 2012