A chimney takes more weather than any other part of your house, and the mortar between the bricks is the first thing to give up. Repointing replaces that worn mortar before water gets in and starts loosening bricks, staining ceilings or rotting timbers. Here is what it usually costs around Hythe, the New Forest and the Dorset coast, and how to know whether your stack really needs it.
Repointing means raking out the old, crumbling mortar joints to a depth of roughly 15 to 20mm and packing in fresh mortar. Done properly it is slow, careful work: the joints are cleaned out by hand or with a small grinder, brushed, dampened, and then filled and finished to match the original profile. The cost is mostly labour and access, not materials.
On older houses across the Waterside, Lymington and Christchurch, the chimney is often built with soft red brick and lime mortar. Using a hard cement mix on those bricks is a common mistake. It traps moisture and the brick faces spall off in frost. A good roofer will match the mortar to the brick, which on pre-1930s properties usually means a lime-based mix.
You can spot most problems from the ground with a pair of binoculars, or from a drone survey if your roofer offers one. Look for the following:
For a typical two-flue stack on a semi or detached house, full repointing usually falls between £600 and £1,400 including scaffolding. A small single-flue bungalow chimney with easy access might come in at £400 to £700. Large stacks on Victorian terraces or exposed coastal properties, where every face needs doing, can reach £1,500 to £2,500.
Scaffolding is the single biggest variable. A chimney on a ridge of a two-storey house needs a proper tower or a scaffold platform, which alone can be £300 to £600. If the stack is accessible from a flat roof or a low single-storey extension, that cost drops sharply. Lime mortar also adds a little, because it needs more skill and cannot be applied in frost or heavy rain, so winter jobs on the coast sometimes wait for a dry spell.
If a roofer is already on the roof for other work, such as replacing lead flashings or a cowl, ask them to quote for repointing at the same time. Sharing the scaffold is the easiest way to keep the price down.
Repointing only makes sense if the bricks are sound. If more than about a third of the bricks are badly spalled, or the stack is leaning, the honest answer is a partial or full rebuild. Rebuilding a stack from the roofline up typically runs £1,500 to £3,500 depending on height and brick matching. It is more money, but repointing a failing chimney is money spent twice.
If the chimney is no longer used, removing it to below the roofline and tiling over is worth considering. It removes the maintenance problem for good and often costs a similar amount to a rebuild. Bear in mind that in the New Forest National Park and in conservation areas around Lymington, Beaulieu and Wimborne, altering a chimney on a listed or protected property may need consent, so check with the council first.
Whatever you decide, ask for photographs before and after. A reputable roofer will show you the raked-out joints and the finished work, because you cannot inspect it yourself from the ground.
Done with the right mortar, repointing should last 25 to 40 years. Coastal stacks facing the Solent or Poole Bay take more salt and wind, so the exposed side may need attention sooner than the sheltered side.
The raking and pointing is straightforward at ground level, but working on a chimney stack without proper scaffolding is one of the most common causes of serious falls at home. The scaffold is most of the cost anyway, so the saving from doing it yourself is smaller than it looks.
Usually not, because it is classed as wear and tear rather than sudden damage. Storm damage that dislodges a pot or part of the stack is often covered, so keep dated photographs of the chimney's condition in case you need to make a claim.
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