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Lining And Insulating Your Chimney - Update

The efficiency of a wood burning stove means that approximately 80% of the heat is transmitted into your room. Compare this to an open fire, which allows 80% of the heat to dissipate up the chimney, and you will immediately see the distinct advantage of wood burning stoves.

It is worth noting, however, that the consequence of less heat dissipating up the chimney is that the stonework in the chimney will be unlikely ever to reach an operating temperature. The effect of this can be that the stove will not draw properly and that the smoke generated may condense in the chimney giving rise to soot and tar deposits. These can be particularly dangerous if allowed to accumulate over time and, for this reason, it is very important that you have your chimney swept regularly. Having said that, tar deposits will not be removed by the brush of a chimney sweep and may cause chimney fires. In addition, significant tar deposits may leak out through the bottom of the chimney and, possibly, back into your wood burning stove. Tar deposits can also degrade over time the mortar in the brickwork of your chimney. Lining your chimney will create a smooth internal surface thereby reducing the opportunity for tar deposits to form.

It is for these reasons that lining your chimney is highly recommended but do please note that any alterations and/or work undertaken on an existing chimney is now covered by building control. There is a link to the Building Regulations on the left-hand side of this page.

The most often used to type of chimney liner is the flexible steel liner, although pumice chimney liners are also popular and provide a permanent masonry insulated chimney. It is not the purpose of this article to give detailed advice on the fitting of either type of chimney liner and we would strongly recommend that this job is done professionally. One very important thing to note always is that there should be no join in the chimney liner in the chimney itself.

We also recommend that your chimney is insulated. The flexible steel chimney liner is best insulated with rockwool insulation, whereas the pumice chimney liner will be a more permanent installation and is, therefore, lined with a mixture of leca chimney insulation and cement. In other words, the gap between the pumice liner and the chimney itself is backfilled with the insulation/cement mix. With the flexible steel chimney liner, this gap is filled with rockwool insulation.

Insulating your chimney liner is advisable because it will help to reduce the condensation that gives rise to soot and tar deposits. A properly insulated chimney will allow for greater temperatures in the flue gases and this will not only reduce the condensation but it will also improve the draw of the chimney because hot air does, of course, rise!

We hope you have found this article useful. Certainly, if considering installing a new wood burning stove for the first time then we would strongly recommend that you check to ensure that the chimney is lined and insulated. Similarly, if moving into a new property that already has a wood burning stove in place, we would strongly recommend that you have it checked before use to ensure that the chimney is lined and insulated. This applies especially in the case of thatched properties.

Please see below for a great selection of chimney liners, chimney insulation and accessories available for sale right now on eBay but, again, we would reiterate that if you are in any doubt about the installation of your chimney liner you should seek professional advice. Remember too that the Building Regulations will apply and any installation will be subject to building control.

Flexible Stainless Steel Flue Chimney Liner For Woodburning Stoves / Solid Fuel
Flexible Stainless Steel Flue Chimney Liner For Woodburning Stoves / Solid Fuel
   £83.34
Stove  Flexible Fuel Flue Liner  Stainless Steel for Wood Burners Chimney 316 L
Stove Flexible Fuel Flue Liner Stainless Steel for Wood Burners Chimney 316 L
   £100.00
Chimney  Flu and liner for gas back boiler
Chimney Flu and liner for gas back boiler
   £0.99
Chimney liner
Chimney liner
   £15.00
Multi-Fuel Stainless Steel Flexible Chimney Flue Liner for Wood Burning Stove
Multi-Fuel Stainless Steel Flexible Chimney Flue Liner for Wood Burning Stove
   £130.00
ducting flue liner pipe air vent chimney extractor
ducting flue liner pipe air vent chimney extractor
   £150.00
Chimney Flue Liner Multi Fuel Flexible Pipe Multifuel Stainless Steel Stoves
Chimney Flue Liner Multi Fuel Flexible Pipe Multifuel Stainless Steel Stoves
   £29.78
Flexible Flue liner Installation Kit Mutli fuel & Wood Burning Stoves 5
Flexible Flue liner Installation Kit Mutli fuel & Wood Burning Stoves 5" 6" 7" 8
   £175.00
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