If you have noticed something wrong with a chimney stack at your Kedington home, Haverhill Roofers can assess and rebuild it properly - but in the meantime, knowing what to do and what to avoid can make a real difference.
Call any time. Calls are answered day and night and passed straight to our roofers.
When a chimney stack above the roofline is leaning, has bricks falling away, or is letting water into the house despite previous repointing, a rebuild is the correct course of action. That means carefully taking down the deteriorated brickwork to the first sound course, relaying with an appropriate mortar mix, forming fresh flaunching around the pot base, and fitting or replacing lead flashings where the stack meets the roof slope.
Haverhill Roofers carries out this work for homeowners in Kedington and across the surrounding area. All chimney work is done from scaffold - there is no safe alternative for work at this height.
The signs that a chimney stack needs more than a patch repair include bricks that are cracking or spalling, flaunching that has broken away from the pot so rain drains into the stack, lead flashings that have lifted from the brickwork, and a visible lean in the stack itself. Damp patches on an interior chimney breast wall - particularly higher up - often indicate that water has been getting in through the stack for some time, even if the roof immediately around it appears dry.
Once you have spotted a problem and arranged for a chimney survey or rebuild, there is often a gap of days or a few weeks before the work can take place. How you handle that period matters. There are practical steps that reduce the immediate risk to your home, and things that seem helpful but can actually make the situation worse or more expensive.
If the flaunching has cracked open or fallen away so that the pot is sitting loose or rainwater is clearly running into the flue, a temporary cover over the pot mouth can reduce water ingress while you wait. A piece of lead or a purpose-made pot cover, sitting over rather than wedged inside the pot, is the safest option. Do not attempt to climb onto the roof or reach the chimney to fit this yourself - see the section below on what not to do.
If you can see that bricks are loose or have already fallen, keep people and vehicles away from the area below the chimney until the work is done. A single loose brick falling from chimney height causes serious injury and considerable damage. If the chimney is on a shared or party wall, make your neighbour aware so they can do the same on their side.
If the stack is visibly cracked, leaning or has missing mortar throughout, using the fire below can make things worse. Thermal expansion from a hot flue puts additional stress on weakened mortar joints. There is also a risk that a cracked or collapsing liner allows combustion gases or sparks to reach the roof structure. Stop using the appliance until the stack has been inspected and repaired.
If you have noticed water coming through on an interior wall, or heard something fall, make a note of the date and take photographs from a safe ground-level position. This helps your roofer understand the timeline and prioritise the most urgent elements when they inspect. If the chimney has been previously repaired, note who did the work and when if you can - that information can be useful during the survey.
Keep an eye on any damp patches inside the house. If you mark the edges of a stain with a pencil and the date, you can see whether it is actively growing. A stain that spreads over a few days indicates active water ingress that is ongoing. If ceiling or wall materials begin to deteriorate or plasterwork sounds hollow, let your roofer know when you speak to them, as this may affect how urgently the job needs to be prioritised.
It is natural to want to do something while you wait, especially if water is getting in. But chimney work involves height, unstable structure and specialist materials, and well-intentioned improvisation frequently creates additional problems.
A domestic roof is not designed to be walked on without the right equipment and experience. Tiles crack or dislodge, and a weakened chimney base provides no safe handhold. Falls from roofs are among the most serious causes of injury to homeowners who attempt their own roof work. Even a short fall from eaves height is dangerous. Do not attempt to inspect or reach the chimney from the roof surface without professional equipment.
Silicone sealant, roof mastic and expanding foam are sometimes used as emergency chimney fixes. The problem is that they do not address the underlying movement or failure, they trap moisture against the brickwork, and they complicate the proper repair when a roofer does attend. Sealant that has been applied over failed mortar or lifted lead needs to be fully removed before correct work can be done, which adds time and cost. If water is getting in, catching it internally with a bucket or towels is better than applying sealant externally.
Mixing and applying mortar at chimney height without the right access equipment, the right mix and the right technique produces results that fail quickly and sometimes create additional structural issues. Mortar applied to a wet or frost-contaminated surface will not bond. The wrong mix will crack. If the underlying brickwork is moving, adding more mortar on top achieves nothing.
The opposite mistake is to leave a failing chimney entirely unmonitored until the repair appointment arrives. Water that is actively entering the stack works through the roof timbers and into ceiling materials faster than most people expect. Monitoring internally and acting on any rapid changes is important.
When the roofer arrives, scaffold is erected to give full safe access to the stack. The chimney is inspected closely to establish exactly how far the deterioration runs. Deteriorated brickwork is taken down course by course to a sound level. New brickwork is laid in an appropriate mortar mix for the age and type of brick used. Flaunching is formed at the top, sloping away from the pot base. New or replacement pots and cowls are fitted as specified. Lead flashings are installed at the chimney-to-roof junction, dressed into the mortar joints and fixed with lead wedges before being pointed over.
A partial rebuild on a standard domestic stack, including scaffold access, typically costs £900 to £2,000. A full rebuild with new lead flashings generally ranges from £1,500 to £3,500, depending on the height of the stack, the extent of the work and whether new pots or cowls are included. These are typical current figures for this area; the actual cost depends on what the survey finds.
If you have a chimney that is showing signs of failure at your Kedington property, call us to arrange a chimney survey. We will inspect from scaffold height, tell you exactly what we find and give you a clear written assessment of what the stack needs. Do not leave it to deteriorate further over winter - call us now.
No obligation · We'll call you to arrange a free visit
Call any time. Calls are answered day and night and passed straight to our roofers.
