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Chimney Flashing & Repairs Dublin

Stop leaks around chimneys with professional flashing, leadwork and targeted repairs across Dublin.

Leak-focused chimney repairs

Photo evidence for your records

Clear written quotes

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Signs of a Chimney Leak

Chimney leaks are one of the most common roofing issues in Dublin homes. Here’s what to look for:
Damp patches around chimney breast
Water stains on ceiling near fireplace
Water visible in attic by chimney
Musty or damp smell near chimney
Leaks appearing after wind-driven rain
Dripping sound inside chimney
Peeling paint or wallpaper near chimney
Mould growth on chimney breast walls

What We Fix

Chimney leak repairs and flashing services across Dublin properties.

Lead Flashing Repairs

Repair or replace damaged lead flashing around chimneys.

Step Flashing & Soakers

Fix stepped flashing details on pitched roofs.

Re-Seal Chimney Base

Apply flexible seals around chimney base joints.

Ridge/Abutment Checks

Inspect ridge and abutment details near chimney stacks.

Pointing/Mortar Repairs

Re-point chimney brickwork to stop water ingress.

Chimney Caps & Cowls

Check and repair caps, pots, and cowls.

Chimney Stack Water Ingress

Address porous brickwork and chimney damp.

Storm Damage Make-Safe

Emergency repairs after wind lifts flashing.

Why Chimneys Leak

Chimney leaks in Dublin properties usually stem from a few common causes. Understanding these helps us trace and fix the problem quickly:

Lead Fatigue & Cracking

Lead flashing expands and contracts with temperature changes. Over time, this causes cracks or splits, allowing water in.

Poor Detailing

Flashing installed incorrectly or without proper overlaps and seals will leak when tested by wind-driven rain.

Mortar Failure

Pointing around the chimney base deteriorates over time, creating gaps for water to seep through into the roof space.

Debris & Blocked Gutters

Leaves and moss collect near chimneys, blocking drainage and causing water to back up under flashing.

Wind-Driven Rain

In Dublin's weather, wind pushes rain horizontally into gaps that would otherwise stay dry. Chimneys are particularly exposed.

Our Chimney Flashing Repair Process

Inspect & Locate Entry

We inspect the chimney, flashing, and surrounding roof to identify the exact entry point of the leak. We check lead condition, mortar pointing, and drainage around the chimney base.

Make-Safe If Needed

If possible, we apply a temporary seal or patch to stop active leaks while we prepare materials and a detailed quote for the permanent repair.

Repair & Tidy Finish

We repair or replace the flashing detail using proper leadwork techniques, re-point where needed, and ensure a watertight seal. Photos provided on request.

All work is explained upfront with a clear written quote. No surprises, no pressure.

When It's Not the Flashing

Not every leak near a chimney is caused by the flashing. Sometimes the water is coming from elsewhere — a slipped slate nearby, a damaged valley, a blocked gutter overflowing behind the chimney, or even a roof vent. Water can travel along timbers and appear at the chimney breast even though the actual entry point is metres away.
That’s why we take the time to trace the leak properly. We inspect the chimney flashing, but we also check the surrounding roof, tiles or slates, valleys, and drainage. If we find that the leak isn’t flashing-related, we’ll be honest about it and explain what the real issue is. We’d rather fix the right problem than carry out unnecessary work.

Trust is everything in roofing. If your chimney leak turns out to be a roof leak elsewhere, a slipped tile, or a gutter issue, we’ll tell you — and we’ll fix it properly.

Recent Chimney Repair Work

MJ Roofing Dublin Roof Repair

Lead Flashing Renewal — South Dublin

Complete lead flashing renewal around large chimney stack. Leak stopped, internal drying out advised.
MJ Roofing Roof Repairs Dublin

Chimney Re-Pointing — Drumcondra

Mortar pointing renewed around chimney base. Sealed gaps where water was seeping into attic.
Roofing services across Dublin

Emergency Flashing Repair — Swords

Storm lifted flashing causing active leak. Emergency make-safe applied, permanent repair completed next day.
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Areas We Cover

We provide slate and tile roof repair services across Dublin and surrounding areas, including Dublin City, North Dublin, South Dublin, Swords, Malahide, Portmarnock, Lucan, Tallaght, Dundrum, Blackrock and nearby areas.

Not listed? Call us — we likely cover your area.

Frequently Asked Questions

What causes chimney leaks in Dublin homes?
Chimney leaks in Dublin homes are most commonly caused by failed or damaged lead flashing — the metal seal between the chimney stack and the surrounding roof. Over time, lead can crack, split, or pull away from the brickwork due to thermal expansion, weathering, or poor original installation. Mortar pointing around the chimney base can also deteriorate, allowing water to seep through. In some cases, the chimney stack itself may be porous or have damaged brickwork. Wind-driven rain is particularly problematic in Dublin’s climate, as it pushes water into gaps that would stay dry in calm conditions. We inspect all these areas to identify the exact cause of the leak before recommending a repair.
Yes, in most cases. Chimney flashing repairs rarely require rebuilding the chimney stack itself. If the lead flashing is damaged, we can often patch or replace the affected section without disturbing the brickwork. If the mortar pointing around the chimney base has failed, we can re-point just those areas. Only in cases where the chimney stack is structurally unsound, severely damaged, or actively leaning would a rebuild be necessary — and if that’s the case, we’ll explain why and provide options. Most chimney leaks we fix in Dublin are purely flashing or pointing issues and can be resolved without major structural work.
Yes, absolutely. After inspecting the chimney and identifying the source of the leak, we take photos showing the damaged flashing, pointing, or other issues. These photos are useful for your records, insurance claims, or landlord documentation. We then provide a clear written quote that breaks down the repair work, materials, and costs. If we carry out a temporary make-safe repair during the initial visit, we document that too. Everything is explained upfront before we proceed with permanent repairs — no hidden extras, no surprises.
Yes, we carry full public liability insurance for all roofing work, including chimney flashing repairs, leadwork, and re-pointing. This protects your property while we work at height. Chimney repairs often require ladders, scaffolding, or roof access, and we follow proper health and safety procedures on every job. You can ask to see our insurance documentation at any time. We take safety and professionalism seriously, whether it’s a quick patch repair or a full flashing renewal.
Yes, we offer emergency call-outs for urgent chimney leaks across Dublin. If water is actively coming in around your chimney — especially near electrics or causing ceiling damage — call us directly and we’ll aim to attend as quickly as possible, often on the same day. Where we can, we’ll apply a temporary make-safe repair to stop the leak and prevent further damage while we prepare a quote for the permanent fix. For less urgent leaks (such as old stains or minor damp), we can usually attend within 24-48 hours. See our emergency roof repairs page for more details.
Yes, absolutely. Water can travel along roof timbers, down walls, and appear far from the actual entry point. A leak that shows up on your ceiling near the chimney might actually be coming from a slipped slate, a damaged valley, or even a blocked gutter metres away. That’s why we don’t assume the chimney is always the culprit — we trace the water path properly before diagnosing the issue. If the leak isn’t chimney-related, we’ll be honest about it and explain what the real source is. We’d rather fix the right problem than carry out unnecessary flashing work.
Yes, if tiles or slates around the chimney are damaged, slipped, or contributing to the leak, we can repair those as part of the job. Chimney leaks are sometimes caused by a combination of issues — faulty flashing plus a few missing tiles, for example. We take a holistic approach: if we’re on the roof fixing the flashing, we’ll check the surrounding tiles, ridge details, and drainage to ensure the entire area is watertight. If additional work is needed, we’ll explain it and provide a clear quote before proceeding.
Yes, we carry out chimney flashing and repair work on both domestic and commercial properties across Dublin. Domestic work includes everything from terraced homes to large period properties with multiple chimney stacks. Commercial work includes offices, apartment blocks, schools, and other buildings where chimney leaks are affecting internal spaces or tenants. We have the access equipment and experience to work safely on larger roofs and can schedule work to minimise disruption to your business or residents.

Fix Your Chimney Leak Today

Call us now for chimney flashing repairs, leadwork, or emergency call-outs across Dublin.
Call +353858483439
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