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Why line and insulate your chimney?

Stove Help & Advice Home

Read this in conjunction with:
Chimney Fires page - including what to do if you have a chimney fire.
Chimney Fire Stats page.
Chimney Tar, Soot and condensates page.
Ways to reduce the risk of chimney fires page.
Chimney sweeping brushes and rods

Reasons for lining and insulating a chimney


When using a woodburning or multifuel stove

  • Insulating your chimney liner reduces tar and soot deposits thereby reducing the risk of chimney fire.
  • Lining your chimney creates a continuous smooth chimney with less surfaces for tar / soot to condense onto. Tar that does form can flow directly back to the stove to be recombusted as opposed to building up in the rough crevices of a masonry chimney.
  • Insulating your chimney liner increases the temperature of the flue gases which in turn will tend to improve the draw of a chimney since warm air rises.
  • Lining your chimney will cure problems of smoke leaking out through cracks in a masonry chimney.
  • Lining your chimney will stop new tar from leaking out through cracks in the chimney or onto your stove.
  • If your chimney is very large then lining your chimney for use with a stove can be a safer option as flue gases in a large chimney cool very quickly resulting in a high level of condensates which are hard to remove when sweeping.
  • Containing the flue gases in a pipe of consistent diameter maintains the flow and velocity of the gases in the system - ie the flue gases will travel faster. This will reduce deposits (as the gases spend less time in the chimney and cool less) and will also improve draw.

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