Chimneys
Chimney repair and leadwork in Oxford
Repointing, rebuilding, new lead flashing and back gutters — the most common source of mysterious leaks.
Free survey, photos and a written quote. 10/10 from 189 Checkatrade reviews.
More of the unexplained damp we are called to starts at a chimney than anywhere else on a roof. The flashing fails before the brickwork does, and water gets in behind it.
We repair what can be repaired, and tell you when a stack genuinely needs rebuilding rather than repointing.
Common chimney problems
- Failed lead flashing at the abutment
- Cracked or missing mortar joints
- Saturated brickwork from a failed back gutter or tray
- Damp patches on the chimney breast inside
- Spalling brickwork, where the face of the brick has blown
- Crumbling or missing chimney pots and caps
Water travels. The stain on the ceiling is rarely directly under the hole, which is why we survey the whole roof rather than only the spot you can see.
Lead codes, briefly
Lead is specified by code, which is just its thickness. Using the right one is the difference between a flashing that lasts and one that splits.
- Code 4 — 1.8 mm. Standard for most chimney flashing work
- Code 5 — 2.24 mm. Extra durability for exposed locations
- Mortar mixed to match existing, with a sample for you to approve
What it costs
Guide ranges. Scaffolding, the height of the stack and how much of the brickwork has failed all affect the price.
confirm 2026/27 prices
Get a price for your roof| Work | Typical range | Usual time |
|---|---|---|
| Repointing a chimney stack | £400 – £1,200 | 1–2 days |
| New lead flashing | £300 – £800 | 1 day |
| Back gutter or tray replacement | £200 – £500 | Half a day |
| Chimney pot and cap fitting | £150 – £400 | Half a day |
| Partial rebuild | £1,500 – £3,500 | 3–5 days |
| Full stack rebuild | £3,000 – £6,000 | 5–10 days |
Chimney & leadwork questions
Still unsure? Call 07468 429000 and describe it. We will tell you whether it needs looking at.
We typically respond within 24–48 hours for standard repairs, and emergency chimney repairs often happen the same or next day depending on availability. Most leak repairs are then completed within one to two days.
The codes indicate thickness. Code 4 lead is 1.8 mm thick and Code 5 is 2.24 mm. We generally use Code 4 for chimney flashing and specify Code 5 for high-exposure locations.
Yes. We match mortar to the existing work — particularly important on visible chimneys on period properties. We make up sample mixes and only start the full job once you have approved the match.
Minor mortar deterioration or isolated brick damage normally only needs repair. Severe structural damage, extensive cracking or a leaning stack usually needs rebuilding. We assess it and recommend the most cost-effective option that is safe.
Most chimney work needs scaffolding or a tower for safe access. We include the access equipment in the quote so you know the total from the start.
Quality repointing with an appropriate mortar mix typically lasts 20–30 years. Lifespan depends on the mortar, the workmanship and the exposure of the stack.
We use appropriate traditional materials and techniques on heritage properties across Oxford, and we respect the requirement for listed building consent where a change of material is involved.
Still to be confirmed by the client
- Do you work on listed buildings? — confirm the client's listed-building experience before this claim goes live
Chimney & leadwork across Oxford and Oxfordshire
Request a free survey
Tell us what you have noticed and where you are. We reply within one working day.
Leaking right now? Call 07468 429000 rather than sending the form — active leaks get priority.