If your chimney stack is crumbling, spalling or leaning, North Walsham Roofers carries out full chimney rebuilds for homeowners in Brundall and the surrounding villages.
A chimney rebuild is not the same as a repoint. Repointing addresses the mortar joints between existing bricks that are still sound. A rebuild is necessary when the brickwork itself has deteriorated, when the stack has moved or cracked structurally, or when mortar failure has gone so far that individual courses have become unstable. At height, unstable masonry is a safety risk, not just an eyesore.
We rebuild chimney stacks from the lead flashing upwards, or from the roof line where the damage extends further down. The lead flashing at the base of the stack is replaced as part of the job because old flashing is almost always the reason water got into the stack in the first place. Where a pot is being retained, it is reset in fresh mortar and checked for cracks. Haunching - the sloped mortar collar around the base of the pot - is reformed to shed rainwater away from the stack.
Bricks are matched as closely as possible to the original. On older properties this matters because mismatched bricks stand out and can affect planning considerations. We use a mortar mix suited to the existing brickwork - a modern hard cement mortar on a softer Victorian brick will cause the brick faces to spall and make things worse, not better.
Chimney work sits at the intersection of bricklaying, leadwork and roofing. A contractor who is strong in one but weak in another will leave you with a problem elsewhere. Ask specifically whether they will replace the lead flashing as part of the rebuild, or whether they expect you to arrange that separately. If the answer is vague, that is a warning sign.
Scaffolding is non-negotiable for a proper chimney rebuild. Working from a ladder on a chimney stack is dangerous and makes it impossible to do the job well. Any quote that does not include scaffold should be treated with caution. Ask what type of scaffold will be used - a chimney scaffold or a full roof scaffold - and how long it will be in place. This affects both the cost and how the job is planned around your household.
Price is not a reliable guide to quality on chimney work. A very low quote often means corners are being cut on mortar mix, on brick matching, or on the leadwork. A quote that is notably higher than others is worth examining carefully too - ask what is included that the others have not priced for.
Before signing anything or paying a deposit, work through these questions with any contractor you are considering:
A contractor who answers these questions directly and without irritation is a good sign. One who deflects, gives vague answers, or pressures you to decide on the spot is not.
When the scaffold comes down and the job is complete, there are things you can check without going on the roof yourself. The new brickwork should look uniform and tightly bedded, with no mortar smeared across the brick faces. The haunching around the pot should be smooth and sloped, with no cracks or gaps where it meets the pot. The lead flashing at the base of the stack should be tucked neatly into the mortar joint, not just stuck to the surface with sealant.
Inside the house, if damp was coming through the chimney breast before the rebuild, it should clear within a few weeks once the stack dries out. If it does not, the source was elsewhere - possibly the roof covering around the stack rather than the stack itself. A good contractor will help you identify this before work starts, not afterwards.
Ask for a photograph of the completed work taken from the scaffold before it comes down. Most contractors will do this without being asked. It gives you a record of the condition of the stack immediately after the job, which is useful if any question arises later.
Chimney stacks deteriorate for a handful of well-understood reasons. Frost is the most destructive - water gets into small cracks in the mortar or brick, freezes, expands, and forces the crack wider. Over several winters this can reduce a structurally sound stack to one where individual courses shift under hand pressure.
Sulphate attack is common on stacks that have been used with solid fuel. Combustion gases carry sulphates that react with the mortar over time, causing it to expand and eventually crumble. You will see this as horizontal cracking running through the mortar bed joints, often with a powdery residue. Once sulphate attack has taken hold, repointing alone will not fix it because the damage is within the brick itself in some cases.
Failed lead flashing is responsible for more damp chimney breasts than any other single cause. If the lead has lifted, cracked, or if previous repairs used bitumen sealant that has now failed, water will be running down inside the stack and into the house. This is not always visible from the ground.
Lime mortar failure on older properties is normal after many decades of weathering. Victorian and Edwardian stacks were built with lime mortar that was designed to be softer than the brick. If a previous repair used hard cement mortar, the brick faces often spall because the mortar cannot flex with the stack. A rebuild is the only proper fix at that point.
Chimney rebuild costs in Norfolk depend on the height of the stack, how much of it needs to come down, whether the pot is being replaced or retained, and what access is required. A standard partial rebuild from the flashing upwards on a two-storey property typically costs between £800 and £1,800 including scaffold, leadwork and pot resetting. A full rebuild from the roof line on a taller property can cost £2,000 to £3,500 or more. These are typical current ranges for the area and will vary depending on the specifics of your chimney.
Get at least two written quotes that itemise scaffold, brickwork, mortar, leadwork and removal of debris separately. A single lump-sum quote makes it very difficult to compare what is actually being offered.
We carry out chimney rebuilds throughout the villages around Brundall, as well as in North Walsham, Aylsham, Acle, North Burlingham and across into Norwich. If you are unsure whether your postcode is covered, ask before you book.
To arrange for us to take a look at your chimney stack and give you a clear, itemised quote, call North Walsham Roofers directly. We will tell you honestly whether a repair will do the job or whether a rebuild is the right course of action.
No obligation · We usually respond within 2 hours
Storm damage, active leak, damaged ridge - we aim to be on-site within 24 hours.
