Chapter one
Seventeenth-century houses and their chimney stacks
Old cottages have prominent stacks, and the lead and pointing around each one decide whether the ceiling below stays clean.
The Victoria County History describes Singleton's houses as unpretentious and mainly of the 17th century, with typical chimney stacks. For a roofer the stack is the main event on a cottage like that. It is brickwork rising through the slope, and where it meets the tiles there are four joints to seal: a back gutter, which is a short lead channel taking water round the upslope side of the stack; an apron across the low side; and stepped flashings, lead let into the mortar courses, up each flank. Any of the four can let rain through, and the water may then run down inside the chimney breast to a ceiling far from the fault.
At a glance
- Village houses are described as mainly 17th-century
- The base of a stack is a common leak point
- Chimney repointing is typically £500 to £2,000

1.1 Pointing, lead and flaunching
Three things age on a stack. The pointing between the bricks loosens as frost and rain work at it. The lead around the base lifts or splits. And at the very top, the flaunching, the sloped mortar collar around the pots, cracks and lets rain run down beside the flues. We start from a ladder and the loft, looking at the stack from outside and from inside, and each fault is recorded in photographs for the written quote. MyJobQuote says lead flashing can last over 80 years, which is why re-using sound lead and repointing round it is often the right call. A stack leaning or with brick faces flaking away is a different conversation, and we say plainly when a rebuild beats another repair.

1.2 Reading the loft
The loft shows what the outside hides. Water tracks along timber, so a dark stain on a rafter or the chimney breast, or daylight at a gap beside the flue, points back to the joint that failed. On a low cottage roof with a large stack, the stack can take up much of the survey, because every course of brick and every fillet of lead gets looked at. Where the rest of the roof is sound, a stack repair is the whole job, and we do not suggest more.
1.3 Chimneys beside thatch
A thatched roof next door changes how a chimney is handled. Approved Document J, which covers flues, asks for larger clearances at a flue outlet near thatch, so a stack beside thatched eaves is not simply rebuilt to the old height by guesswork. Our chimney repairs page explains pointing, flaunching and rebuilds, and our lead roofing page covers the flashings.
Typical UK costs for a chimney stack
- Lead patch repair£150 to £250
- Lead replacement, no scaffold£350 to £460
- Chimney repointing£500 to £2,000
- Stack rebuild£2,000 to £10,000+
After the survey, the figure for your own stack arrives in writing as one total; check whether a quote covers VAT and scaffolding. Source: MyBuilder chimney repair guide, updated 21/08/2026; MyJobQuote lead work guide, 22/09/26.





