Property Types & Audiences
A tenement flat chimney is swept from inside the flat, like any other, but the stack it runs up is shared with every flat in the building. That means the first job is confirming which flue belongs to your fireplace, and the second is making sure it is sound, because a crack or a collapsed divider between flues can let smoke into a neighbour's home. A sweep, and often a camera survey, answers both before you start using the fire again.
Many tenement fireplaces were boarded up decades ago and have not been used since. Reopening one is a good reason to have the flue swept and checked rather than simply lighting a fire and seeing what happens.
Why tenement flues need extra care
Each flat usually had a fireplace in several rooms, so a single stack can carry a dozen or more flues, separated only by thin walls. Over the years some of those walls crack or partly collapse, and flues that belong to different flats end up joined. Pots may have been capped or removed at different times by different owners, so what you see on the roof does not always match what is inside.
- Many flues running side by side in one stack
- Thin dividing walls that can crack with age
- Pots capped or removed by previous owners
- Neighbours above and below sharing the same stack
How the sweep works
We protect the room and the close, open the fireplace or stove and sweep upward with the debris drawn into a sealed vacuum. A clear run to the top tells us the flue is open; if the brush stops, there may be a blockage, a capped pot or a closed-off section. A sweeping certificate is issued afterwards for your records, your insurer or your tenants.
When a camera survey or smoke test is worth it
If you plan to fit a stove, if a neighbour has reported smoke, or if the fireplace has been closed for a long time, a CCTV survey shows the condition of the flue and whether it is sound enough to use or needs lining. A smoke test can confirm the flue does not leak into other flats. Both are more straightforward before a stove goes in than after.
Owners, factors and neighbours
Work on the shared stack, such as pots, flashing or repointing, is usually a common repair arranged through the factor or the other owners. Sweeping and lining your own flue is normally your responsibility. It helps to tell neighbours when the sweep is booked, particularly if you share a stair and a van will be parked outside.
Fitting a stove in a tenement flat
Many flat owners reopen a fireplace with a stove in mind. The same shared-stack considerations apply, with a few more. The flue normally needs to be sound and correctly sized for the stove, which in older tenements often means a liner. The hearth must suit the appliance and the floor construction, and a carbon monoxide alarm is essential. Because the building is shared, check whether your title deeds or factor have any requirements before work starts, and ask your local authority which building standards route applies.
A survey at the start answers most of these questions and avoids buying a stove that the flue cannot serve. It is also the moment to confirm which pot on the roof belongs to your flue, so any cowl or terminal is fitted to the right one.
Frequently asked questions
Can a chimney in a tenement flat be swept?
Yes. It is swept from inside the flat. The main difference is making sure the correct flue is identified and that it is sound, because the stack is shared.
Is it safe to reopen a boarded-up tenement fireplace?
Only after the flue has been swept and checked. Long-unused flues can be blocked, capped or cracked, which could send smoke into your room or a neighbour's.
Who is responsible for the chimney stack in a tenement?
The stack is usually common property, so repairs to it are arranged with the other owners or the factor. Your own flue and fireplace are normally your responsibility.
Do landlords of tenement flats need a sweep certificate?
Landlords should keep evidence that solid fuel appliances and flues are maintained, and a sweeping certificate from each visit is a straightforward record.
Tenement fireplace to sweep or reopen?
Sweeping, CCTV surveys and liners for flats. Call 07826 049704.