Knaresborough has one of the highest densities of original chimney stacks per street of any town in North Yorkshire. The Georgian and Victorian housing concentrated in the medieval street grid above the Nidd gorge means that almost every property has at least one substantial stack — many have two or three. Built predominantly in local limestone or traditional brick, the mortar pointing on these stacks has been under the pressures of Knaresborough's climate for 100–200 years.
The gorge microclimate is particularly damaging to chimney mortar. High ambient humidity prevents mortar from ever fully drying out, while the freeze-thaw cycles of a North Yorkshire winter work ice into any existing cracks. Portland cement — used in many 20th century repointing jobs — is too rigid for this environment and eventually cracks. The correct specification for Knaresborough's limestone and older brick stock is lime mortar — flexible, breathable, and appropriate to the original construction.
Lead flashing at the junction between chimney stacks and the roof covering is the second major chimney repair category in Knaresborough. Gorge-side properties on Water Bag Bank, Chain Lane and the streets looking out over the Nidd see lead oxidation and lifting accelerated by the persistent moisture exposure. We re-dress existing lead where possible, and replace where deterioration is too advanced for effective repair.
Scaffold, Skips & Street Access
Most chimney stacks are too high for safe ladder work, so scaffold is usually required and included in the quote; low single-storey stacks may allow tower access. Scaffold is specified for: almost all chimney work — stacks sit at the highest, most exposed point of the roof - always itemised in your written quote, never a hidden extra, and we arrange it.
Knaresborough’s gorge-side and market-town properties sit on steep, narrow streets where scaffold and skip placement need careful planning. Pavement scaffold and skip permits go through North Yorkshire Council; allow a few working days on streets like the steep streets down to the Waterside, Briggate, Kirkgate where space is tight.
Chimney Repairs Prices in Knaresborough
| Job | Typical range | Notes |
|---|---|---|
| Flashing re-dress | £200-£500 | Lead around the base |
| Stack repointing (accessible) | £150-£400 | Lime mortar on period stacks |
| Full stack repointing + scaffold | £450-£800+ | Exposed high stacks |
| Flaunching renewal | £150-£350 | Mortar cap around pots |
| Cowl supply and fit | £80-£200 | Per pot |
| Partial stack rebuild | £600-£1,500 | Per scope |
What moves the price
- Stack height and exposure — scaffold is usually essential
- Lime mortar matching on Harrogate’s period stacks
- Whether flaunching, pots, or a cowl also need work
- The prevailing-weather face is always first to fail
Worked example: Two exposed stacks on a Harlow Hill Edwardian semi repointed in lime mortar with flaunching renewed: around £700-£1,100 including scaffold.
Staged payment on larger stack work; nothing before materials are on site. VAT included. Written 10-year guarantee.
Covering HG5 and surrounding postcodes.
Your Guarantee, Explained
Chimney repairs carry a written 10-year workmanship guarantee; we use correctly matched lime mortar on period stacks so the repair lasts.
- Covered: workmanship for 10 years, in writing, transferable if you sell.
- On top: manufacturer warranties on materials (terms vary by product).
- Not covered: storm or impact damage - that is an insurance matter, and we will document it for your claim.
If a fault appears in covered work, we come back and put it right. No quibbling, no re-charge.
📞 Call 01423 203744 for a free, no-obligation quote.