If you are thinking about having a chimney stack removed at your Attleborough home, here is exactly what the process involves from the moment we arrive to the moment we leave.
A chimney take-down is not a quick patch job. It involves scaffold, structural brickwork, roofing and debris removal, all on the same visit. Homeowners who know what to expect at each stage find the day far less disruptive, and they are better placed to check that the work has been done properly before they sign it off.
Dereham Roofers handles chimney take-downs across Attleborough and mid-Norfolk. What follows is an honest, step-by-step account of how the job runs.
Before any scaffold goes up, the job needs to be properly assessed. That means looking at the chimney stack from ground level with a good pair of binoculars, checking the condition of the brickwork, the flashings, and the cap. We look at the roof covering around the base of the stack to understand what the reinstatement will involve.
Inside the property, we check the chimney breast in the rooms below to understand how the stack is positioned relative to the roof structure. This matters because the stack has to pass through the rafters somewhere, and the structural repair at roof level depends on what is there. We also need to know whether the fireplace is blocked off and whether there is any risk of the flue still being in use.
At this point we can tell you what the job involves, what materials will be needed to match your existing roof covering, and what the cost will be. Nothing proceeds until you are happy with the plan.
Safe working at roof level is not optional. A chimney take-down requires someone to be working at height while breaking down brickwork and handling debris - scaffold is the correct way to do that.
A typical chimney take-down scaffold is a relatively modest structure: a platform at eaves level or slightly above it, with guard rails and toe boards, and access from a ground-level ladder. On a standard two-storey property, erecting the scaffold takes the better part of a morning on its own. The scaffold needs to be positioned so that it gives working access to the stack but does not damage the roof covering or guttering. Protective boards or pads are laid on the roof tiles where the scaffold makes contact with the slope.
The scaffold stays up until all the work is complete and signed off. It is not taken down between the demolition and the roofing stages.
Before a single brick comes off, the roof tiles or slates immediately below and around the stack are protected. Falling debris, even from a short height, can crack or shatter tiles. A piece of board or heavy-duty sheeting is laid on the roof surface in the working area.
Inside the property, the fireplace opening should be sealed or covered if possible. Dust and small debris can fall down through the flue as the upper courses of brickwork are removed. This is worth doing before the work starts rather than discovering a coating of brick dust on the living room carpet afterwards.
The stack is taken down course by course, working from the top. Bricks are removed by hand, broken free with a bolster and lump hammer, or cut where they are bonded into each other in a particularly solid section. The aim is controlled demolition rather than simply knocking the stack over - chimney stacks sit directly above occupied living spaces and the roof itself, so the work has to be done methodically.
Debris is passed down to the scaffold platform and from there to the ground. It is not dropped or thrown. Some brickwork is recoverable and can be reused; the rest goes into a skip or onto a waste vehicle.
The stack is taken down to just below the line of the roof covering. The last few courses of brickwork stay in place inside the roof void, below the tile level. These are trimmed back, levelled off, and capped to prevent water pooling on them in the roof space. The old flashing - lead apron, back gutter, and soakers - is stripped at this stage and taken away with the rest of the debris.
This is the part of the job that homeowners rarely see but that determines whether the finished repair lasts. The chimney stack passed through the roof structure. Removing it leaves a void between the rafters that needs to be properly closed.
New timber is cut and fitted to frame the opening. This provides a solid base for the roofing materials and restores the structural continuity of the roof at that point. Where the existing rafters were cut or notched to accommodate the stack, the new framework spans those cuts and ties the structure back together.
A breathable roofing membrane or sarking felt is then lapped over the new framework and dressed into the existing felt on either side. This secondary layer means that any rain water that gets past the tiles still has a barrier to keep it out of the roof space. The felt must be overlapped correctly - not just laid in, but lapped in the right direction so water runs off it rather than underneath it.
Where the existing roof has insulation - either between the rafters or laid flat on the ceiling joists - the repair area is insulated to match. Leaving a cold gap in the insulation at the old chimney position is a common source of condensation problems.
With the structural work done, tiles or slates are fitted to close the opening. The aim is a weathertight repair that matches the existing roof as closely as possible.
Tiles are bedded and hung to match the gauge of the surrounding roof. The courses need to line up with the existing tile courses on each side - a repair where the courses fall out of alignment stands out and, more importantly, creates points where tiles do not drain properly.
Ridge tiles, where they are affected, are relaid in fresh mortar. Any tiles disturbed to give working access around the old stack base are lifted, checked for cracks, and relaid. This is the point at which we also check the condition of the surrounding tiles - if anything was already cracked or slipping before we started, we flag it rather than simply re-covering it.
Once the tiling is complete, everything is checked from the scaffold platform. We look at the line of the new tiles, the junction with the existing covering, and the mortar work on any ridge tiles. Any loose material is cleared from the roof surface.
The scaffold is struck after the inspection. All debris - brick rubble, old lead, broken tile fragments, mortar dust - is loaded and taken away. The working area at ground level is swept and left clear.
We carry out a final check from the ground once the scaffold is down, looking at the overall appearance of the repair against the rest of the roof. If anything does not look right from ground level, it is addressed before we leave.
You do not need to go onto the roof yourself, but there are things worth looking at before signing the job off. Check that the new tile courses line up visually with the surrounding roof from ground level. Look at the ridge line if it was disturbed - it should be straight and the mortar bedding should be solid with no gaps. Inside the house, check that the fireplace area or chimney breast has no new cracks or damage that was not there before.
If you have any concerns, raise them on the day. It is much easier to address something while the scaffold is still standing than to bring it back afterwards.
If you have a redundant chimney stack that needs attention, call us to arrange an inspection. We will walk through the job with you, explain what is involved for your specific roof, and give you a clear quote before anything starts.
No obligation · We usually respond within 2 hours
Storm damage, active leak, damaged ridge - we aim to be on-site within 24 hours.
