Chimney Repointing Cost & Signs You Need It

Updated 14 September 2026 · 4 min read

Chimneys take more weather punishment than almost any other part of a roofline - fully exposed on four sides, at the highest point of the building. Repointing is routine maintenance most owners only think about once mortar has already started falling, which is usually later than ideal.

Signs your chimney needs repointing

• Mortar that’s visibly crumbling, cracked, or missing between the bricks or stones
• Damp patches on a chimney breast inside the house, especially after heavy rain
• Loose or visibly leaning chimney pots
• Vegetation (moss, small plants) growing in the joints - a sign moisture is sitting in the mortar rather than shedding
• Visible daylight or gaps when viewed closely from ground level, not by climbing up

Typical costs

A straightforward repoint on an accessible chimney typically runs from around £500 to £1,200, with scaffolding or tower access usually the biggest variable in that range rather than the pointing work itself. A full rebuild of a badly deteriorated stack costs considerably more - often £1,500-£3,500 - and is a different job entirely from repointing.

Why mortar mix matters more than most homeowners realise

Modern cement-based mortar is harder and less porous than the lime mortar used on most pre-1919 properties, common across Greater Manchester’s Victorian terraces and villas. Repointing an older chimney with modern cement can trap moisture inside the brickwork instead of letting it evaporate out, which accelerates frost damage rather than preventing it. A competent installer will match mortar mix to the age of the property, not just use whatever’s in the van.

Flaunching and flashing - often bundled with repointing

Flaunching (the mortar collar around the base of the chimney pots) and lead flashing (where the chimney meets the roof) both fail through the same freeze-thaw cycles as pointing, and a competent inspection checks all three together. A quote for “repointing” that doesn’t mention flaunching or flashing is worth double-checking - a chimney can be perfectly repointed and still leak from a failed flashing joint at the base.