If your chimney stack in Feltwell is showing visible damage, cracked joints or crumbling brick, it needs to be looked at without delay - a failing stack is a structural and safety risk, not just a cosmetic one.
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There is a point where patching a chimney stack stops making sense. Repointing cracked joints or re-bedding a loose pot buys time when the underlying structure is sound. But when the brickwork itself has deteriorated - when courses are shifting, mortar is washing out faster than it can be replaced, or the stack is visibly leaning - a full rebuild from the roof level up is the safer and more economical long-term choice.
Brandon Roofers carries out chimney rebuilds for homeowners in Feltwell and the surrounding area. We take the stack down to a sound base, rebuild it with matched brick and properly mixed mortar, bed the pot, and apply fresh flaunching to seal the top. The result is a stack that is structurally solid and weathertight.
Most chimney problems give visible signals before they become dangerous. The difficulty is that chimneys sit high up and are easy to overlook from ground level. Here are the signs worth acting on promptly:
Understanding the cause matters because it determines whether a repair will hold or whether a rebuild is genuinely needed.
Brickwork that stays damp is vulnerable in cold weather. Water expands when it freezes, and repeated freeze-thaw cycles slowly break down both the brick face and the mortar joints. Older stacks built with soft handmade bricks are particularly susceptible because those bricks were not fired to resist prolonged saturation the way modern engineering brick is.
The lead flashing where the chimney meets the roof slope is the joint most likely to fail first. Flashing fails because the mortar chase that holds it into the brickwork erodes, because the lead was poorly fitted to begin with, or because it has simply reached the end of its serviceable life. Once flashing is letting water past, damp tracks down into the stack and speeds up the deterioration of the brickwork above roof level. Failed flashing is one of the most common causes of chimney problems in older properties.
Many stacks were built with mortar mixes that were too strong relative to the softness of the brick. Hard mortar does not flex with the movement a chimney experiences, and it cannot absorb the slight thermal expansion and contraction that happens throughout the year. Over time the brick cracks to accommodate the stress that the mortar refuses to take. A rebuild using a lime-based or appropriately gauged mortar matched to the existing brickwork avoids repeating this error.
A chimney that has not been inspected for many years may have developed problems invisibly. Flaunching cracks go unnoticed; a pot that has shifted slightly goes unfixed; hairline cracks in joints widen season by season. By the time the issue becomes visible from the ground it is often more advanced than it looks.
Before any rebuild work is quoted or begun, the stack needs to be inspected properly - not just from the garden with binoculars, but from the roof itself. A close inspection tells us exactly how far down the damage goes, whether the flashings need replacing, whether the existing bricks can be salvaged for re-use, and what mortar type is appropriate for the rebuild.
During an inspection we check the condition of every accessible course of brickwork above the roof line, the flaunching, the pot, the lead flashings and the pointing at the junction with the roof tiles. We also note the chimney's current use - whether the fireplace below is in active use, unused, or has been blocked. This affects what work is needed and what specification the rebuild should follow.
Older properties and listed buildings can present specific challenges when it comes to chimney rebuilds. Matching the original brick size, colour and texture is important both aesthetically and, in the case of listed buildings, as a planning requirement. Original soft handmade or stock bricks should be matched wherever possible rather than replaced with modern pressed brick that will look visibly wrong.
If your property is listed, it is worth checking with the local planning authority before work begins - some authorities require listed building consent for chimney work that alters the external appearance. We can advise on what the work involves; formal consent is a matter for you and the relevant authority.
Once scaffolding is in place and the inspection is complete, the damaged sections of the stack are carefully taken down course by course to a sound base. Any bricks in good enough condition are set aside for potential re-use. The rebuild goes up using new brick matched as closely as possible to the existing, laid in a mortar mix appropriate to the age and type of the building. The flashings are replaced or re-dressed in lead, the pot is re-bedded, and the flaunching is applied in a mix that will shed water effectively without being so hard it cracks the pot neck.
As a rough guide, a chimney rebuild from the roof line up on a standard semi-detached or terraced property typically costs between £1,000 and £2,500, depending on the height of the stack, how many courses need to come down, and whether the flashings also need replacing. Taller or more complex stacks on detached houses can cost more. Scaffold hire is usually the largest single variable - if you have other roof work to do at the same time, combining jobs on a single scaffold can save a meaningful amount.
These figures are indicative; the only way to get an accurate price is to have the stack inspected from the roof. Call us to arrange a roof survey for your Feltwell property.
A repair - repointing, re-flaunching, re-bedding a pot - is appropriate when the brickwork itself is structurally sound and the problem is confined to joints or the cap. A rebuild is needed when the bricks themselves are crumbling, when the stack is leaning, when multiple courses are structurally compromised, or when the cumulative cost of repeated repairs has exceeded the cost of doing the job properly once.
Yes. A chimney that is visibly deteriorating, leaning, or has significant open joints should not be used until it has been assessed and any necessary work completed. Using a structurally compromised flue is a fire and carbon monoxide risk.
Lead flashing fails most often because the mortar holding it into the chase in the brickwork erodes over time, allowing the lead to lift and water to get behind it. It can also fail if it was not adequately dressed to the brickwork when first installed, or simply because it has reached the end of its life. When we rebuild a stack, the flashings are replaced or properly re-dressed as part of the same job.
The work is carried out externally, from scaffold. There is no need to access the interior of the house in most cases. If the fireplace is in use we would advise covering it inside to contain any dust or debris that falls through the flue while the pot is off.
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Call any time. Calls are answered day and night and passed straight to our roofers.
