Chimney Repair Specialists in North Wales.

Chimney repair in North Wales spans two very different property types. Wrexham Victorian terraces on streets around Queen Street and Bradley Road follow the same dense-stack, party-wall, Code 4 lead pattern we handle across Merseyside: shared chimneys, lime repointing, and flashings that have not been renewed since the 1980s. Coastal properties from Flint through Rhyl and Abergele carry a salt-driven stack repair pattern where the mortar joints erode faster under the combination of sea air and driving rain than any inland equivalent. Flaunching on those coastal stacks cracks through the repeated wetting and drying cycle and admits water into the stack core, which then tracks down the internal breast into the bedroom ceiling. We rebuild flaunching in a polymer-modified mortar rather than OPC on exposed coastal stacks to give the joint better elasticity through the thermal cycle. The Chester Team reaches the coast inside an hour for emergency chimney callouts.

Chimney stacks are the most neglected part of most roofs. They stand above the ridge line and take full exposure on all four faces, but they get inspected last and repaired latest. By the time a chimney is leaking into a bedroom ceiling, the flashing and pointing have usually been failing for two or three years. The repair is then bigger than it needed to be.

We handle the full chimney stack from crown to base: repointing, lead flashing renewal, pot replacement, stack rebuilding where the brickwork has moved beyond repair, and capping off redundant stacks to stop water ingress permanently. A chimney call almost always means scaffold, and scaffold access lets us do a proper four-face inspection of whatever the scaffold is set against.

What we run on chimney work

Flashings come out in Code 4 lead on standard residential chimneys, Code 5 where the pitch is steep or the stack is wide. We cut the lead into the mortar joints at the correct rake rather than using surface-fixed soakers that will lift in the wind. The step and cover flash is formed on site, not off the shelf.

Pointing mortar is matched to the original specification where the property is pre-1919, which usually means a softer lime-sand mix rather than OPC. Hard Portland cement pointing on Victorian brickwork causes spalling as the brick is softer than the joint; a like-for-like lime mix moves with the stack through seasonal temperature change.

Stack caps on redundant chimneys go on as either a purpose-made clay cap or a lead-dressed brick corbel, depending on what the house looks like. We do not leave expanding foam plugs or taped polythene as permanent solutions.

When to rebuild rather than repair

If the stack has moved more than 25mm off plumb, if the brickwork is spalling on more than two courses, or if the flaunching (the sloped cement collar around the pots) has cracked through and is sitting in pieces, rebuilding is the right call. Repointing a stack that has moved does not stop it moving further. A partial rebuild from the flashing line up costs less than people expect and is a permanent fix.

What it costs

Scaffold for chimney access runs between £400 and £800 depending on height and roof pitch. A full lead flashing renewal on a standard residential stack is typically £600 to £900 plus scaffold. Repointing four faces adds £200 to £400. A partial rebuild from scaffold level up is typically £1,200 to £2,200 depending on how many courses are replaced and whether the pots are retained.

What we back it with

Chimney work carries a 5-year workmanship guarantee on repointing and flashing, and a 10-year guarantee on any rebuild work. Lead carries its own material longevity; Code 4 sheet lead dressed correctly will outlast the pointing around it.