If you want to know exactly what happens when a chimney stack comes down on an Elmswell property, this page walks through the process step by step.
A chimney take-down removes a redundant stack to below roof level and closes the roof over so it is fully watertight again. For homeowners who no longer use a fire or stove and have no plans to do so, it removes a structure that would otherwise need ongoing maintenance to stay weather-tight.
We carry out chimney take-downs for homeowners in Elmswell and across the surrounding area, including Stowmarket, Haughley, Thurston, Great Barton, Pakenham and Bury St Edmunds. The process described below is what a properly carried out take-down looks like, regardless of property type.
Before any work is priced or booked, the stack should be looked at properly. A ground-level inspection gives a general idea of the stack's condition and size, but a close-up look from scaffold or a ladder tells you much more: the state of the pointing, whether the flashing has lifted, the condition of the pots and haunching, and how the stack sits relative to the ridge and the surrounding tiles or slates.
The survey also establishes what tile or slate is on the rest of the roof, because that determines what material will be needed to close the patch. On some roofs, a good match is straightforward. On others, particularly those with older or discontinued tile profiles, it requires sourcing reclaimed material and that takes a little more time to arrange.
A good surveyor will also check the condition of the lead flashing around the base of the stack, the underlay or felt beneath the surrounding tiles, and whether any water has already tracked into the roof space. If there is existing damage to timbers or sarking felt, it is better to know about it before work starts rather than after.
Chimney take-downs cannot be done safely without proper access. A scaffold tower or full tied scaffold is erected before any dismantling begins, depending on the height of the property and the position of the stack. For a stack on a two-storey house, a standard scaffold lift is typical. A chimney positioned toward the centre of a large roof span may require additional bridging to allow the roofer to work safely across the slope.
Scaffold should be in place before any bricks are disturbed. Dismantling a chimney from a ladder is not safe practice and creates a real risk of dropped materials damaging gutters, tiles and anything below. If a contractor suggests doing the job without proper scaffold to reduce cost, that is a risk worth taking seriously.
Before the stack is taken down, the fireplace opening or the flue at ceiling level inside the house should be covered or sealed. Even on a dry day, breaking out brickwork sends fine dust and debris down the flue and into the room below. A sheet of heavy-duty polythene taped across the opening at each floor level keeps the interior clean and makes the job significantly less disruptive for the people living in the house.
If the flue connects to a closed-off fireplace, the same applies. A sheet pushed up inside the opening and secured is usually sufficient.
Dismantling starts at the top. The chimney pots come off first, then the haunching (the mortar that beds the pots) is broken away, followed by the courses of brick down to just below the roof line. The bricks are lowered by hand or in a rubble bag to the scaffold platform rather than thrown. This protects the roof tiles and the scaffold itself.
The number of courses that need to come down depends on where the stack sits on the roof. The goal is to reduce it to a point where the roof can be tiled over in a straight, neat line that sheds water properly. Typically this means taking the stack down to at least one full course below the top of the surrounding tiles or slates, so the new tiling lies flush rather than bridging a step.
Any loose or deteriorated brickwork that is exposed during demolition is taken down as well. There is no benefit in leaving questionable material in place below the finished tile line, because it can still hold moisture and expand in frost.
Once the brickwork is at the right level, the remaining surface needs to be prepared before tiling begins. Any rough or projecting mortar is cut back so the surface is flat. If the flue is open at this point, it should be capped with a small concrete or mortar fillet to prevent birds nesting in it and to stop water sitting in the void. The felt or membrane beneath the surrounding tiles is checked and, if necessary, extended or patched so there are no gaps beneath the new tile work.
This preparation stage is where some of the less obvious but important details happen. The junction between the tile work and the remains of the stack needs a proper lead detail to prevent wind-driven rain from getting underneath. Code 4 lead is the standard minimum for this type of work.
New tiles or slates are laid across the patched area, cut to fit the angle and shape of the surrounding roof. Matching the existing roof covering is the aim on every job. On roofs with standard concrete interlocking tiles, a close match in profile is usually achievable. On older clay-tiled roofs, reclaimed tiles in the same or a very similar profile give the best result. On natural slate roofs, reclaimed slate in the appropriate thickness and origin is the honest way to get a good match.
The tiles are laid from the bottom of the patch upward, with each course overlapping the one below in the same way as the surrounding tiles. The ridge tiles across the patch area, if the stack was at or near the ridge, are relaid in mortar or re-bedded using a dry-fix system to match what is already there.
The lead details at the edges of the patch, particularly where the new tiling meets the existing roof on each side, are dressed and pointed to ensure water cannot track underneath at those junctions. This is the part of the job that most determines how well the repair performs over the next decade. A tile patch that is correctly laid but poorly flashed at the edges will develop a slow leak that can be difficult to diagnose later.
On a properly finished job, the lead is dressed neatly into the tile courses and any pointing at the perimeter is fresh and well-bonded. There should be no open joints and no reliance on sealant as a substitute for proper lead work.
All the brickwork, broken mortar, old pots and tile offcuts are cleared from the scaffold platform and removed from site. The gutters immediately below the working area should be checked and cleared of any debris or dust that has settled during the job. Any polythene sheeting inside the house is removed at this stage.
The scaffold is then stripped once the tiling work has been signed off. On a standard single-flue stack take-down, the total working time on site is typically one to two days, not counting scaffold erection and collection, which is arranged separately by the scaffold contractor.
Once the scaffold is down, it is worth doing a ground-level check of the finished roof. The tile patch should sit flush with the surrounding roof surface, the ridge line should be continuous without any humps or dips, and there should be no visible open joints at the edges of the patch. If anything looks off from the ground, raise it with the contractor before they leave the area.
Inside the house, the fireplace opening or sealed flue should show no sign of debris or dust coming through. If there is any staining on walls or ceilings around the old chimney breast in the weeks after the job is done, that may indicate a pre-existing leak that was already present before the take-down, rather than new damage.
If you want a straightforward assessment of what your chimney take-down will involve and what it is likely to cost, call us to arrange a roof survey. We cover Elmswell, Stowmarket, Haughley, Thurston, Great Barton, Pakenham, Wickhambrook, Rede and the wider area back into Bury St Edmunds. Call us to book a site visit at a time that suits you.
No obligation · We usually respond within 2 hours
Storm damage, active leak, damaged ridge - we aim to be on-site within 24 hours.
