Lead Flashing Repairs in Dublin
Flashing is the metalwork that keeps water out wherever a roof meets something else — a chimney, a wall, a dormer or another roof slope. These junctions cannot be weathered by the slates or tiles alone, so the flashing does that job.
When flashing lifts, splits or was poorly detailed in the first place, water gets straight into the structure below, often appearing some distance from the junction itself.
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Where flashing matters most
- Chimney stacks, at the front apron, steps and back gutter
- Wall abutments where a roof runs into brickwork
- Valleys between two roof slopes, where applicable
- Junctions between a main roof and an extension or dormer
- Around openings and penetrations through the covering
How we approach the job
1.Identify what has failed
Age, movement, poor original detailing and previous repairs all cause flashing to fail in different ways, and the fix depends on which it is.
2.Fix into the structure
Flashings are set into the joint and secured rather than stuck to the surface and sealed, so they stay put.
3.Treat the junction as a whole
Aprons, step flashings and back gutters work together. Renewing one element and leaving a failed neighbour usually means the leak returns.
4.Neat, weathered finish
The lead is dressed tidily to the covering, which matters for how the junction performs as well as how it looks.
Why mastic and flashing tape fail
Sealant and self-adhesive tape are often used as a quick fix on a leaking junction. They rarely last long in Irish weather, and they can make the eventual permanent repair more awkward.
Movement and splitting
Flashing expands and contracts with temperature. Long runs without joints eventually fatigue and split along their length, which is why sizing and detailing matter as much as the material itself.
Costs and choices explained
Trying to work out what this might cost, or whether it is the right approach for your roof? These guides explain what the price depends on — without pretending a roof can be priced accurately online.
Not sure this is what you need?
If you know what you can see but not what is causing it, these pages explain the likely causes and what a roofer needs to check.
Coverage
Lead Flashing across Dublin
We work across Dublin city and county, and also cover parts of Kildare, Meath and Wicklow.
FAQ
Lead Flashing — common questions
Can split flashing be repaired, or does it need replacing?
Small isolated splits can sometimes be repaired. Where the lead has fatigued along a run, renewing that section is the reliable option.
How do I know the flashing is the problem?
Damp near a chimney breast, staining on a wall below a roof junction, or a leak that only shows in wind-driven rain all point that way — but the junction needs looking at to be sure.
Is a mortar fillet as good as flashing?
No. Mortar fillets used in place of proper flashing crack as the building moves, and are a common source of water ingress on older properties.
Will new lead look obviously different?
New lead is bright at first and dulls to a grey patina over time. Patination oil is applied to reduce staining on the surfaces below it.
Related
Related services
Chimney Repairs
Roofing repairs around chimney stacks — flashing, junctions, mortar and the surrounding roof covering.
Learn moreChimney Repointing
Raking out and renewing deteriorated mortar joints on chimney stacks, with the surrounding roof detailing checked.
Learn moreVelux & Skylight Repairs
Leaking roof windows investigated and repaired, plus skylight and roof window installation.
Learn moreLeaking Roof Repairs
Tracing the true source of a leak and repairing it properly, rather than patching where the stain appears.
Learn moreRoof Repairs
Repairs to slate, tile and flat roofs — from a handful of slipped slates to recurring leaks.
Learn moreFlat Roofing
Flat roof repairs and replacement on extensions, dormers, garages and porches across Dublin.
Learn moreTalk to a roofer
Need a Roofer in Dublin?
Need help with a roof repair, leak or roofing project? Call Vantage Roofing or request a quotation online. Fully insured, with 24/7 emergency roof repair call-outs.