flue liner

Where does it say it would be against building regs to line a flue with a flexi flue liner?
It is good practice to have the flue diameter the same size as the outlet of the stove, prevents over firing. This is achieved by using a flexi flue liner backfilled with vermiculate. It also reduces the cooling of the flue gasses, reducing the buildup of tar in the chimney. It also makes sweeping chimney easier.

I'm no expert, just have done the research.

johnytwentyten wrote: »

if i install the liner will that also mean that when i clean the chimney il be removing the soot from the stove itself? seen some diagrams where they install a soot door at the back of the fireplace opening, dont think this would work for me. this is where i seen the point about building regs http://chimneysolutions.ie/flexible-steel-lining must point out that only against regs if installing liner in clay lined chimney

Your are misreading! A chimney by Regulation must have a liner, but there are many types of liners. It is not against regs to install a flexible liner within a clay liner.

You must also properly clean a clay liner before installing a flexible liner for obvious reasons.

how high does the liner have to go up?

Ok, was wondering, I was looking at some inset stoves so they would fit into the existing space with out kangoing stuff out (the type with a door, but not the back boiler type) to replace the open gas fire as its not used. I was thinking of just getting one to burn logs, to give a small bit of added heat to the living room and possibly the room above, but also for the tidier look.and stop the gale going up it.
I had a look at the info on the boxes and they dont seem to suggest a flue is needed to go all the way up, just a certain amount.
Im not even sure if it would be possible to get a solid flue of 600mm or even less up my chimney as there is a bit of an angle back the way it goes to the chimney, the chimney effectively goes up the outside of the house (maybe not great design as I think it might allow heat out than keep it in the house all the way up the chimney).

Robbie.G wrote: »

With insert stoves it's nearly impossible to fit a 600mm connecting flue pipe.In those cases I get a pipe made up as long as possible.Measure up to the gather unit (that's where the clay liner starts) and order a pipe that distance.If you connect flexi straight into stove it won't last as there is too much heat at that point even though a good flexi is rated for 600c.Its your choice if you don't want to line the complete chimney I'm only stating what has to be done to comply with building regs.

Personally I'd prefer to have the whole thing lined as the chimney backs onto a bedroom, but I'm wondering how much lining the whole chimney would cost, that might be the crux of whether it will be affordable/worth it.
I didnt realise the regulations required it, I was going by the installation instructions I saw on a few stove packagings, they seemed to suggest only a few metres was required at max.

Robbie.G wrote: »

The regs don't state that you have to line a chimney once you fit a stove its just that it makes it more efficient.There are currently very few regs governing stoves.As you say that in some stove instructions you can fit to the way they say the main thing to remember is no 90degree bends allowed in solid fuel and no horizontal run of pipe longer that 150mm.There are hundreds of threads covering stoves here I hope some of this is of some help to you

I'm afraid they do say just that. Most people confuse the words chimney & flues. You can fit a flue into a chimney but you cannot fit a chimney into a flue!
The regs state you cannot used an unlined chimney & it must be lined with liners such as clay, flexible, etc.