Once your chimney stack has been taken down and the roof made good in Eye, a small amount of ongoing attention is all it takes to make sure the repaired area stays sound for years.
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A chimney take-down means dismantling the stack from the top to just below the roof surface, then closing the opening with a timber-framed infill covered in felt and matching tiles or slates. The flashing around the old stack is removed, and the area where the stack met the roof is reseated and pointed. The result is a continuous, weathertight roof slope with no stack projecting through it.
It is a significant structural change to the roof, even though from the ground it may look like a straightforward patch job. The infilled area has its own felt, battens and tile fixings, and it meets the existing roof at two verge-like junctions that need to be properly sealed. Those junctions are the most common place where a chimney take-down fails over time, which is why aftercare matters.
In the twelve months after a chimney take-down, the repaired section settles into the surrounding roof. Some very minor mortar cracking at the edges of the patch is not unusual as the new material acclimatises. What you should not see is:
If you notice any of those, call the roofer who did the work promptly. A small remedial fix in the first year is trivial to carry out. Left for a winter, a hairline gap in the edge pointing can allow water to track in and cause damage to the felt layer beneath, which then means stripping tiles to get at it.
You do not need to go on the roof to keep an eye on the repaired area. Once a year, ideally in late autumn before the worst of the weather, spend five minutes looking at the patch from the ground with binoculars.
Look at the tiles in the patched area. They should sit flat and consistent with the rest of the slope. A tile that has lifted slightly at one corner or slipped down will be visible. Look at the mortar line where the patch meets the surrounding roof on each side. It should be continuous with no obvious gaps or dark lines where moisture has got behind it. Look at the ridge or hip tile nearest to where the stack used to be, as these can sometimes be disturbed during the removal process and are worth confirming are still properly bedded.
Do the same check inside. In the loft space, shine a torch at the underside of the roof deck in the area where the stack used to penetrate. You are looking for any sign of staining, dampness or daylight. Even a very small amount of light visible through felt is a sign that attention is needed.
Chimney stacks are often positioned where two roof slopes meet, sometimes close to a valley or a parapet gutter. Once the stack is gone, the water run-off pattern in that area changes slightly. It is worth checking that the gutter directly below the patched area is clear and flowing freely.
Blocked gutters are among the most common causes of damp in properties, and the area around a recent chimney take-down is worth checking specifically because debris from the work itself can sometimes end up in the gutter below. Leaf build-up in autumn adds to this. A gutter that overflows in heavy rain will push water back under the eaves and into the fascia, leading to damp in the top of the wall below.
Removing the stack at roof level leaves the chimney breast inside the house intact. Leaving the breast in place is perfectly fine structurally. However, if you want to remove the internal breast at some point, that is a separate project.
Internal chimney breast removal requires building regulations approval, usually a structural engineer's specification, and a padstone or beam to carry whatever load the breast was helping to support. It is not a job for a roofer. You would need a builder with experience of structural alteration, and the beam size would need to be calculated for your specific situation. Do not assume that because the stack has gone, the breast is no longer loadbearing - many are, and removing one without proper support causes serious structural damage.
On many properties, the chimney that has just been removed was deteriorating partly because the roof around it had not been maintained. Once the take-down is complete, it is worth looking at the wider roof condition while you have a roofer's assessment fresh in your mind.
Pointing on ridge tiles and hip tiles elsewhere on the roof, condition of any remaining lead work, the state of the felt in the loft, and the security of any other flashings are all worth reviewing at the same time. A small amount of planned maintenance prevents the same pattern of deterioration that made the chimney an urgent job.
A chimney take-down patch done with correct materials and proper workmanship should last as long as the surrounding roof. The tiles or slates used are the same products as the rest of the roof, and the felt and batten beneath them are to current standard. The mortar at the edges, as with all exterior pointing, will benefit from inspection every ten years or so, but there is nothing inherently weaker about the patched area once it is correctly finished.
The junction between new and existing felt beneath the tiles is the detail that matters most. If the roofer has lapped the new felt correctly over the existing felt, water that gets past the tiles has a clear path to the gutter. If it has been rushed or cut too short, it will find its way into the roof space instead. This is not something you can check after the tiles are on, which is why it is worth asking specifically about this detail before work starts.
If you had a chimney taken down recently and want a second opinion on how the patch has bedded in, or if you are considering a take-down in Eye for the first time, call Diss Roofers to arrange a roof survey.
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Call any time. Calls are answered day and night and passed straight to our roofers.
