Chimney installations

 
ABOVE: Lining a chimney using a multi fuel flexible liner for wood burning stoves.
 
Reasons for lining a chimney when installing wood burning stoves
 
For a wood burning stove to work correctly it must be connected to a sound chimney and correctly sized flue, therefore it is always recommended fitting a chimney liner when installing a new multi-fuel stove.

If a chimney liner is not installed there are a number of problems that you may experience.

1. Smoke and fumes from wood burning stoves leaking into other rooms or parts of the building.

2. Tar seeping through the chimney walls causing staining.

3. The old flue surface has deteriorated, resulting in poor up-draught.

4. The flue is much too large for the type of appliance being used resulting in poor up-draught.

5. The flue is cold and damp especially if it’s on the outside wall, reducing the heat of the smoke and gases resulting in poor up-draught.

 

Can I do the work myself?

Although lining a chimney for wood burning stoves now falls under building control it’s not a complicated job and can be done by a competent DIYer, however you must inform your local building control department who will inspect the work once the job has been completed. Please click here for Building Regulations that apply to stoves. Document J

If you would like your chimney liner to be installed for you, please see our HETAS installer page.

Tools required to install a flexible chimney liner

There are no specialist tools needed to fit a flexible chimney liner for wood burning stoves, however you will need access to the top of the chimney stack using roof ladders or preferably scaffolding, it is highly recommended to use harnesses when working at height, other safety equipment should include masks, goggles and gloves.

Installing the flexible flue line

1. Before you start the chimney must be swept and inspected for structural defects and the area around the stove should be protected from debris and dust.

2. If you are using our chimney pot hanging cowl, you can skip this step, otherwise you will need to remove the chimney pot and mortar on top of the chimney stack.

3. Cut the register plate to size and fix the angle iron in place.

4. You will need a piece of rope 5 meters longer than the liner. Tie a weight to it and lower it down the chimney.

5. Attach the nose cone to the bottom of the liner (the liner is directional, arrows pointing upwards) and if using Rockwool, Chimwrap or k-wrap secure this to the liner.

6. Tie the rope to the nose cone and lower the liner down the chimney, if there are bends in the chimney and the liner gets stuck it is possible to open up the chimney from inside the house to help the liner navigate the bend.

7. Once the chimney liner is in place, connect the chimney liner to the appropriate adaptor using stainless steel self-tapping screws then fit the stove pipe, now fit the register plate, put the stove in place and seal around the register plate and flue pipe with fire cement.

8. If you have pre insulated the flexible flue liner it is recommended that you put adequate vermiculite insulation above the register plate to stop the heat escaping in to the chimney void, this should be done before putting the top plate on.

9. If you haven’t pre insulated the flexible flue liner then it is recommended you fill the chimney void with vermiculite insulation.

10. If you are using a chimney pot hanging cowl cut the flexible flue liner to length and attach the chimney pot hanging cowl to the chimney liner using the provided fixing straps, insert the cowl into the chimney pot and attach using the straps provided.

11. If you are using the traditional method cut the liner to length and fit the top plate and insert and then the top clamp.

12. Re-fit the chimney pot and leave for 34 hours before performing a smoke test.

Wood burning stoves should always be treated with care, regularly maintained and well installed. A poorly installed or poorly cared for wood burning stove can cost lives. These instructions are designed as a guide only to help safe installation but if you are unsure on how to install your wood burning stove then please do contact a professional.

6 thoughts on “Chimney installations”

  1. Hi,I’m looking at one of the log burners and have an existing chimney previous used for a central heating back boiler that was removed when I changed the boiler to a combi.
    I am looking at a log burner just as a basic one with the best price for installation.
    Please could you advise me on these costs as an estimate possibly using the cowl option if the simplest.
    Thanks,

  2. Hello, I am looking to purchases one of your boiler stoves to heat a house and/or water. I was looking at your “Broseley Hercules 30kw Multifuel Wood Burning Boiler Stove” now I understand 30kw may not be the size I need but can be worked out at a later date.

    I have a few questions. First is will I need to install a pump to use your boiler. Bearing in mind the water tank and/or some of the radiators will one 2 stories above the stove (in a converted attic).

    How does the out up on a wood burn compare to a gas combie boiler (at the moment the boiler is 8-9’s)

    I was think about not installing some register plate and blocking the chimney of at the second floor. Then an aircon vent system in the floor to heat the house. I’m not sure your heaters have been used is such a fashion but any comments would be very helpful.

  3. Hello, am looking at your “Broseley Snowdon 26kw Multifuel Wood Burning Boiler Stove” I can’t think it is more expensive that your 30kw model.

    What does multifuel mean?

  4. Hi we’re thinking of installing a Henley Ascot 5kw multi fuel wood burning stove to an existing fireplace opening that was used for an open fire with no back boiler. My worry is that the opening is height 22′ by width 24′ and the burner measurements are height 20′ by width 16′ would this be adequate? I’m worried that the heat would not be projected into the room. Thanks in anticipation of your reply.

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