Who this suits
Many homes in the North East have chimneys that were built for open coal fires and have not been used in years. Some are in good condition, but many have cracked or missing parging, leaking joints, or a flue that is far wider than a stove needs. A liner can make an existing chimney safe and help a stove draw well.
If your home has no chimney at all, which is common in newer houses, bungalows and extensions, a stove can often still be fitted using a purpose-made insulated flue system. This page covers both.
Types of liner and flue
Most stove installations into an existing chimney use a flexible stainless steel liner. Liners come in different grades, and the right one depends on the fuels you plan to burn, with multi-fuel use generally calling for a more resistant grade. The diameter has to suit the stove's flue outlet and the manufacturer's instructions. Where there is no chimney, a twin-wall system has an insulated layer between two steel skins, which keeps the flue gases hot so the stove draws well and the outer surface stays cooler.
What's included
Liner and flue work is usually carried out alongside a stove installation or stove replacement. Depending on the house, it can involve:
- Inspecting the chimney inside and out, including the stack and pot
- Smoke testing to check for leaks
- Installing a flexible flue liner of a suitable grade and diameter
- Fitting a register plate and the connecting flue pipe from the stove
- Fitting a suitable chimney pot, cowl or terminal
- Designing and fitting a twin-wall insulated flue where there is no chimney
- Labelling the flue with its details, as the regulations require
What needs a site assessment
Flue work depends heavily on what we find, so a site assessment is essential. We look at:
- The condition of the chimney and stack, and whether there are signs of damp, staining or leaks
- The height of the chimney and its position relative to the roof and nearby windows
- Whether the flue is shared, has bends, or connects to other fireplaces
- Access to the roof and chimney stack, and whether scaffolding or other access equipment will be needed
- For new flue systems, the route through walls, floors or the roof, and where the terminal can safely sit
If the chimney needs building repairs before it can be lined, such as rebuilding a stack or repointing, we'll tell you so you can plan for it.
How the assessment and installation work
1. Enquiry
Send us photos of the fireplace and of the outside of the chimney stack, plus anything you know about when the chimney was last used or swept.
2. Site assessment
We inspect the chimney or flue route and discuss the options with you.
3. Written quote
Your quote sets out the liner or flue system proposed, the access needed and any related work.
4. Installation
We install the liner or flue, connect the stove and test the system.
5. Handover
We explain how the flue should be looked after and swept, and provide the paperwork.
Fitting a stove with its flue is notifiable building work in England. It must be certified either by an installer registered with a government-approved competent person scheme or through Building Control. Our how it works page has more detail.
Safety and regulations in plain language
Carbon monoxide. A leaking flue can let carbon monoxide into the home. The Building Regulations require a carbon monoxide alarm in the room when a solid fuel stove is installed, and we fit one as part of a stove installation.
Clearances. Flues and flue pipes get hot, so they must be kept a safe distance from combustible materials such as timber joists and roof structures. Twin-wall systems are made for this, but the manufacturer's clearances still apply.
Data plate. The regulations require a notice plate recording the details of the hearth and flue, usually fixed near the hearth, the electricity consumer unit or the water stopcock, so anyone working on it in future knows what was installed.
Terminal position. Where a flue comes out of the roof affects how well it draws and where smoke goes, so it needs to clear the roof and nearby openings by the distances set out in the regulations.
Smoke control areas. A good flue won't make an unsuitable stove legal. The whole of Newcastle upon Tyne is a smoke control area, so a stove burning wood there needs to be Defra exempt.
Sweeping. Lined flues still need sweeping. HETAS advises at least twice a year when burning wood, and at least once a year for smokeless fuels.
What happens next
If you're unsure whether your chimney is usable, request a quote and include photos of the stack, along with anything you know about the chimney's history. We'll arrange a site assessment and explain the options in a written quote.