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How To Install a Flue Liner

What is needed:


*Angle grinder with metal cutting wheels, hacksaw or tin snips.


*Length of rope longer than your chimney is tall, twice as long ideally.


*Flue Liner


*Nose cone.


*Gloves, mask, goggles, suitable clothing.


*Two people.


How to fit a chimney flue liner is, for the first time installer, possibly the most daunting of the tasks when it comes to fitting a Multi Fuel Stove. The task can be very easy or it can be a nightmare. We have installed flue liners in less than 20 Mins and we have also had a flue liner take 2 days. This was a extream flue liner that was 20 meters long and with a blockage within the chimney.


The task can be very difficult – some flue liners, usually 6" (150mm) rather than 5" (125mm), do not like tight chimneys as in the issue we had above. You must not mind working at heights if you are to install a flue liner as it is still slighty jelly legs for the best of us.


However, in many cases it can be very straightforward, especially if scaffolding is used (or a cherry picker), or if suitable cat ladder and a harness.


Note that you can always employ a local roofer to fit your liner, who will often be done and dusted withing a couple of hours max. and they are much easier to find than stove fitters (especially in winter!).


Do not underestimate what it’s going to be like “up top”. It is very easy to look up and think that it can be done but you must be sure in you can see the job through.


This is the most usual method of installing a chimney liner.


You have swept the chimney haven’t you? This is a MUST. Otherwise the loose soot is still a fire hazard and the person helping fit a chimney liner from inside the property will be covered in soot. The room may also fill with billowing soot dust.


Sweeping from bottom to top also tells you which pot belongs to your fireplace, something you obviously need to know. Shortly you will be dropping a weight attached to a rope down the chimney; you do not want this knocking loads of soot off the walls of the flue and into the fireplace of another room.


Before we go any further let’s do a quick overview of what is going to happen.


*You are going to drag a long length of stainless steel tube to the top of your chimney stack.


*You are going to drop a rope down the chimney (with a weight on the end) so your helper can grab it from within the fireplace (your end secured to one end of the liner).


*You are going to use both hands to feed that liner down the chimney whilst your helper pulls down with the rope. The liner might get stuck on a bend. Then you have to pull it back up a bit, then push it down a bit and even maybe spin the whole lot 180 degrees (remember you might have a number of metres of the liner being dragged around your roof at this stage).


The liner will likely arrive in a coil. Uncoil it. It may have arrows printed on it. These arrows should always point to the sky when the liner is fitted (they show the smoke direction). DO NOT fit the liner upside down.


Fit the nose cone to the liner using strong tape lots of it or self tapping screws. If the cone has no “tie off handle” then you need to drill a hole in it and slip a short length of rope through, tying a large knot inside the cone.


Connect your long rope to the short rope connected to the cone. Connect a weight to the other end of that long rope. Take the weight to the top of the chimney and lower it down slowly until your helper has it.


Feed the liner down the chimney. Your helper is pulling and you are pushing. Hopefully the liner will slip easily down the chimney.


But if the liner stops and will not feed further then stop and take a breather. When ready pull it back and try again, hopefully after a few attempts it will go.


If it will not go then you have to start thinking why? If it is in the first few metres then it will likely be getting stuck in the loft area (where chimney flues often split away from each other and run off to their various rooms).


If the liner does get stuck here then you can try the following to fit your chimney liner:


Try “turning the liner 90 degrees” whilst you and your helper attempt to pull push as before. This works if the liner has turned one bend and is not set up for the next bend (has bent itself to point the wrong way). Then try 180 degrees.


Any “spinning” is a lot easier for a double bend lower down in the chimney than this high up though; due to the sheer amount of liner sticking out of the chimney and lying on the roof.








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