Cracked mortar joints let water into the stack and then into your bedroom ceiling. We repoint chimney stacks across Beverley using lime mortar on period brickwork, plus flaunching, cowls and capping. Free survey. Call 0148 290 8437.
Chimney repointing in Beverley typically costs £350 to £750 per stack, using natural hydraulic lime mortar on pre-1920s brickwork rather than cement, which traps moisture and spalls the brick. Flaunching, cowls and capping are itemised separately. Because chimney access is expensive, batching all stack work into one visit is markedly better value.
Repointing a stack is more than smearing mortar over the joints. Here is what a proper job on a Beverley chimney involves.
Chimney work in Beverley divides sharply between the period stacks of the conservation core and the Victorian streets, where lime mortar and matched brick are essential, and the post-war estate stacks, where the issues are different. Getting the mortar right is the single most important decision, and it is the one most often got wrong.
Pre-1920s brickwork — the Victorian terraces around Queensgate, the Georgian and period property of the conservation core — was built with lime mortar for good reason. Lime is softer than the brick and vapour-permeable, so it sacrifices itself preferentially and lets the wall breathe. Cement is harder and impermeable; repointing a period stack in cement traps moisture in the brick, which then freezes and spalls the face, destroying the very material the pointing was meant to protect. On Beverley's period stacks, natural hydraulic lime is the correct and often the only appropriate specification.
A chimney is a column of masonry standing above the roofline in the full weather, and Beverley's position on the edge of the Wolds gives its stacks a harder time than sheltered valley property. The prevailing south-westerlies drive rain into the windward face, and the freeze-thaw cycling of an East Yorkshire winter works the mortar joints hard. Stacks on the higher western side of town and on exposed corner plots weather faster and need attention sooner.
Water entering through failed pointing or cracked flaunching runs down inside the flue or through the brickwork and emerges as damp on the chimney breast, often at first-floor ceiling level and sometimes on the floor below. It is regularly blamed on the roof covering, on condensation, or on rising damp. Where a chimney breast has been damp for years with no roof-level cause found, failed pointing and flaunching are usually the reason — and on older stacks, an absent lead tray damp-proof course.
Many Beverley stacks no longer serve a working fire, and for these the options are repoint and retain, reduce and cap, or remove. On period and conservation property a stack is part of the roofline and removing it changes the elevation — often requiring consent — so repointing to keep it sound is usually the right call. A disused flue should be ventilated at both ends and capped with a ventilated cowl, not sealed, or it becomes a condensation trap that damps the breast below.
Chimney access is the most expensive access on a domestic roof, usually needing a tower or a full scaffold with a chimney lift. That cost is largely fixed once the access is up, so piecemeal stack work is poor value. If the pointing needs doing, it is almost always worth renewing the flaunching, replacing a cracked pot and fitting a cowl in the same visit rather than paying the access cost again twelve months later. On the shared party-wall stacks of Beverley's Victorian terraces, coordinating both halves at once saves both households.
Indicative prices per stack. Access is the main fixed cost, so batching pointing, flaunching, pot and cowl work into one visit is markedly better value.
Localised repointing where sound elsewhere.
Full stack in matched lime mortar.
Reinforced mortar, weathered and belled.
Per pot, with flaunching renewal.
Bird guard, anti-downdraught or capping.
Where damp persists after pointing.
Historic England advises that pre-1919 masonry should be repointed in lime-based mortar, because cement mortar is harder than the surrounding historic brick and traps moisture within the wall, causing the brick face to spall.
Source: Historic England, Repointing Brick and Stone Walls
"Damp on the bedroom chimney breast that two other firms blamed on the roof. These found it was the pointing and flaunching, repointed the stack in lime, and it dried out over the summer. Proper diagnosis."
"Repointed our period stack near the Minster in matched lime mortar and renewed the flaunching and pot in the same visit. Knew exactly what the conservation area needed. Excellent."
"Shared stack with next door was leaking on both sides. They did both halves in one scaffold and split it fairly between us. Sensible and tidy."
Repointing a full stack typically costs £350 to £750 in matched lime mortar, with localised repointing from £150. Flaunching, pots and cowls are itemised separately. Because chimney access is expensive, batching all stack work into one visit is markedly better value than separate call-outs.
Pre-1920s brickwork was built with lime mortar, which is softer than the brick and vapour-permeable. Cement is harder and impermeable, so repointing a period stack in cement traps moisture in the brick, which then freezes and spalls the face. Lime is the correct specification for Beverley's period and conservation stacks.
Often it is the stack. Water through failed pointing or cracked flaunching runs down the flue or brickwork and emerges as damp on the breast, frequently misdiagnosed as a roof leak, condensation or rising damp. Where no roof-level cause is found, failed pointing and flaunching are the usual culprits.
Repointing specifically renews the mortar joints of the stack. Chimney repairs is broader — flashings, flaunching, pots, rebuilds and leaks. The two overlap and are often done together, but if your stack's brickwork joints are eroding, repointing is the specific work you need.
On period and conservation property, repointing to keep the stack sound is usually best, since removing it changes the elevation and often needs consent. A disused flue should be ventilated at both ends and capped with a ventilated cowl rather than sealed, which would trap condensation and damp the breast below.
Spring and autumn are ideal, because lime mortar must be protected from frost and from drying too fast in strong sun. We will carry out urgent work in colder conditions with the mix and protection adjusted, but discretionary stack work is best programmed for milder weather.
Yes, and it is almost always worth it. Chimney access is the main cost, and once the tower or scaffold is up, renewing cracked flaunching, replacing a pot and fitting a cowl adds little — far less than mobilising access again for each separately.
A free survey, an honest diagnosis of what is actually causing the damp, and an itemised quote in the correct materials for your stack. No call-out fee.
0148 290 8437