Chimney Lining...

[Gordon Henderson]

I'm thinking of DIYing a chimney lining. (Mostly because I can't get someone to do it until Feb) Background is that I opened up a fireplace which had a hideous gas fire, got it swept - sweep suggested a liner as it looked like it had had a chimney fire in the past - there already is a register plate and it seems OK, so want to install a wood burner, but need the liner in.

I've read a few things online & watched someone line another chimney in the house for a range cooker (big aga-like thing) and it seems fairly straightforward. Access to the roof will be the hardest part due to the local topology, but ought to be managable.

Put the liner in, fill with vermiculite, seal it up, put pot back on, connect stove and off I go?

So any gotchas, pointers, etc. ?

Cheers,

Gordon

[mcbrien410]

Gordon, are you going to use the flexible stuff or a jointed sections?

Chris.

[Henry]

As I understand it any work on a flue requires building control approval nowadays.

Henry

[Jonathan Pearson]

I'd start here

[Gordon Henderson]

Flexible. Only becaue I've never heard of jointed stuff!

Gordon

[Chris Bacon]

1) Do you really need a liner? It's a lot of trouble, if not needed. 2) The corrugated flexible liners are not suitable for solid fuel.

[Gordon Henderson]

When the chappie was in to sweep the chimney (2 weeks ago) he recommended it. He said it looked like the chimney had had a fire in recent years (it's been blocked with a gas fire in it for the past 7 or 8). There were a lot of glassy tarry deposits on the walls, and when he swept it what came back down wasn't soot, but a bucket load of crumbly mortar and half a brick...

Other houses in the street aren't lined (that I know of), but then they might not have suffered a chimney fire either...

Ah, that's good to know. No-one has mentioned that to me before.

Thanks,

Gordon

[mmzz]

You do need a liner. the internal dimension should be matched to the woodburner you use. There are different grades depending on fuel, ie for gas, wood, coal

[John Anderton]

I'm not sure if this is what Chris means but my chimney liner consists of a number of 1m long steel(?) pipes of about 20cm diameter which you slot together and then slide up the chimney. This means you can build up from the bottom (If there's room to work) which was great for me because a) I can't stand heights and b) my chimney is difficult to get to from outside.

OTOH I do have a 'walk-in' fireplace so that made it easier :-)

Cheers,

John

[AJH]

The double skinned flexible stuff for wood stoves has to be installed in one, un jointed, length. It also has to be fed from top down and in the right direction. I don't think diameter less than 125mm is allowed for solid fires.

AJH

[Gordon Henderson]

Ah right. I see now. Unfortunately, the flue isn't vertical. Theres a zig-zag as it goes up to get round the bedroom fireplace directly above it.

Gordon

[Gordon Henderson]

Thanks for this and the other replies! I'm not looking for solid fuel, wood only!

If I can easilly get all the bits locally, I'll have a bash at it between the solstice and the new year.

Cheers,

Gordon

[Chris Bacon]

I was referring to single-skinned S/S "hosepipe".

[Tim S]

Hi

This thread sparked an interest...

Out of interest, can a liner be used with an open wood/coal fire and if so, what sort of size is needed - bigger than that for a stove presumably?

Cheers

Tim

[Rob Morley]

Since when is wood not a solid fuel?

[The Natural Philosopher]

Might pay you to ge a new double insulated pipe scetioned thing...rather than install a flexible.

You have to drop from the top dowm. Really needs scaffolding.

Easy unles your flue is kinky. Then you have serious problems.

[The Natural Philosopher]

No ity doesn't.

I had it dione about 4 years ago and it came in sections.

You can't transport 6 meters of kinked double walled pipe on many lorries :D

[The Natural Philosopher]

Do you really need a house fire?

[david lang]

I thought you only need the double skinned, double insulated stuff if it was possible for some to touch it and accidentally burn themselves?

Dave

[Gordon Henderson]

It's kinky...

Gordon