If your chimney stack in Soham is crumbling, leaning or letting in water, a full or partial rebuild is often the only lasting fix - and choosing the right contractor to do the work properly is the most important decision you will make.
Call any time. Calls are answered day and night and passed straight to our roofers.
A chimney rebuild is not a patch-up job. When brickwork has deteriorated to the point where repointing will not hold, or the stack has started to lean, the only sound approach is to take it down to a safe level and rebuild from there. Depending on how far the damage extends, that might mean rebuilding from the flaunching - the mortar collar that seals the base of the chimney pots - or taking the entire stack down to roof level and starting again with fresh brickwork.
Every rebuild should include new lead flashing where the stack meets the roof slope. Flashing is the most common point of failure on any chimney: if it has lifted, cracked or pulled away from the brickwork, water tracks straight into the roof structure and the walls below. A contractor who rebuilds the stack without addressing the flashing is leaving the root cause in place.
There is no safe or accurate way to rebuild a chimney stack from a ladder, and any contractor who tells you otherwise is cutting a corner that matters.
A chimney stack sits at the highest and most exposed point of your roof. Wind and frost get to it before anything else on the building. Mortar joints erode over time; once water gets into the brickwork and freezes, it expands and accelerates the breakdown. Left alone, a stack that looked slightly scruffy two winters ago can become genuinely unstable.
Water from a deteriorated chimney does not always show up as a ceiling stain directly. It can track down inside wall cavities, soak into timber wall plates and rafters, or appear at a ground-floor level long after it entered at the top. By the time damp is visible inside, the damage has usually been building for a season or more.
This is where most homeowners go wrong - not in understanding the work, but in picking who does it. Here are the questions worth asking before you agree to anything.
Scaffold is non-negotiable for a proper chimney rebuild. It gives the roofer a stable platform to lay bricks accurately, bed lead flashing correctly and check the work as they go. Ask directly: will you erect scaffold? If the answer is no, or if they offer a rope-and-harness approach as a cost-saving measure, the quality of the finished job will reflect that.
A good contractor will want to look at the stack before giving a price. That means checking the condition of the brickwork from ground level at minimum, and ideally from scaffold or a roof ladder before the full scaffold goes up. Be cautious of any quote given purely from a photo you have taken on your phone. The extent of the damage - how far down the stack the bad brickwork goes, whether the flashing is salvageable, whether the chimney pots are cracked - directly affects the price and the scope of work.
Chimney stacks should be rebuilt using a lime-based or hydraulic lime mortar rather than a pure cement mix. Hard cement mortar is less flexible than the brickwork itself; in a chimney that moves slightly in the wind, a rigid mortar cracks and lets water in faster than a softer mix would. Ask the contractor what mortar they intend to use and why. A roofer who cannot answer this question has probably not thought about it.
For the flashing, ask whether they are using lead or an alternative. Lead is the standard material and, when properly dressed and clipped, will outlast most other options by decades. Aluminium or self-adhesive flashings are cheaper but do not perform as well long-term on a stack that sees significant thermal movement.
Chimney rebuild quotes should itemise scaffold hire and erection, the extent of the demolition (how many courses of brickwork are coming down), materials including bricks, mortar and lead, and whether the chimney pots and flaunching are included. If a quote is a single lump sum with no breakdown, ask for one. It makes it much easier to compare two quotes fairly and to understand what you are paying for.
Typical costs for a partial chimney rebuild - from the flaunching up, including new pots and lead flashing - run from around £800 to £1,500 for a straightforward single stack, depending on the height of the roof and the extent of the work. A full rebuild from roof level, including scaffold, will generally cost between £1,500 and £3,000 or more depending on the stack size and access. These are honest UK ranges; be wary of quotes that fall significantly below them.
Once scaffold is up and work begins, it is not unusual to find that damage runs deeper than it appeared from below. Ask the contractor upfront: if you take down the stack and find the damage goes lower than quoted, how will you handle the additional cost? A straightforward contractor will tell you they will stop, show you what they have found and give you a revised price before continuing. One who gives vague answers to this question may present a much larger bill at the end.
Ask how the new brickwork will be pointed and whether the finished mortar joints will be slightly recessed (known as struck or weathered pointing) rather than flush or proud of the brick face. Recessed joints shed water more effectively on an exposed chimney. Ask whether they will rebed the chimney pots in fresh flaunching mortar and whether the lead flashing will be stepped into the mortar joints or dressed over the surface. Stepped soakers set into the joints are the more durable method.
We carry out chimney rebuilds across Soham and the surrounding area, including Cambridge and nearby towns and villages. If you can see that your stack is in poor condition - mortar dropping from joints, bricks that have spalled or cracked, pots that sit at an angle, or flashing that has pulled away - call us to arrange a roof survey. The sooner a deteriorating chimney is assessed properly, the more options you have and the lower the likelihood of emergency work later.
Call Cambridge Roofers to book a chimney survey in Soham.
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.
