Yes – a twin wall flue can travel internally within your house or externally on an outside wall. If your house does not have an existing chimney but you want to install a Wood Burning stove you will need to use a Twin Wall insulated flue pipe.
Will I Need Planning Permission?
The installation of a stove and new flue system does not normally have anything to do with your local planning authority. However if you are living in a listed building is it a possibility this may be required. If you have decided your new flue piping is going to run up the outside of your house then dependant on the position of the piping you may need to check first with your local Planning Department.
Any work undertaken affecting an existing chimney or creating a new one is considered as building work and therefore comes under the Building Regulations. It is worth noting prior to installing your chimney you are required to notify Building Control – unless you are a HETAS engineer or are approved to self certify.
Twin Wall Flue Pipe
A twin wall flue pipe is a system, which can safely take combustion gases produced by a Wood Burning stove and release into the atmosphere.
Twin wall flue pipe systems are designed to keep the flue gases warm. This insulation is essential; comprising of approximately an inch of insulation comprising of two stainless steel walls filled with a thick layer of insulation, usually rockwool.
If you do not use insulated pipe for your chimney the gases would cool and slow down rather than rising, as it should. If the gas does not rise this would cause the smoke underneath to come out of the vents instead of rising out of the chimney top.
This kind of insulation makes sure that the stove will draw as is required, so that it becomes easier to start a fire and to keep it lit. Also it will ensure the outside of the flue system is cooler than it is on the inside, which makes the clearance of the combustible materials less than it would be using a single wall flue pipe.
The twin wall flue system is made up of several different components, which slot together. These components may vary; it all depends on the route the system will take.
Before you get started, you have to choose where you want the flue to run through the house.
The first option you have is to exit the twin wall pipe via the wall from where the stove is – this would mean that most of the flue pipe runs externally, on the outside of your house.
The second option available would be to run the flue system internally via the ceiling from the lower floor up through the next floor until reaching the loft space to finally exit at the roof. This option can be appealing to some property owners as less flue can be seen from the outside with this option.
Twin wall flue commonly comes in a stainless steel finish as standard. Although some people might prefer a coloured finish such as black or white. You can choose a powder coating that gives a durable finish, which is both resistant to heat and corrosion.
For more information concerning stove installation or flue systems please do not hesitate to call us on: 01926 851 570 or email us
